diff --git a/Common/Server/Services/AlertEpisodeOwnerTeamService.ts b/Common/Server/Services/AlertEpisodeOwnerTeamService.ts
index 6ee3790148..4bc6b1d735 100644
--- a/Common/Server/Services/AlertEpisodeOwnerTeamService.ts
+++ b/Common/Server/Services/AlertEpisodeOwnerTeamService.ts
@@ -1,10 +1,199 @@
+import ObjectID from "../../Types/ObjectID";
+import { OnCreate, OnDelete } from "../Types/Database/Hooks";
 import DatabaseService from "./DatabaseService";
 import Model from "../../Models/DatabaseModels/AlertEpisodeOwnerTeam";
+import AlertEpisodeFeedService from "./AlertEpisodeFeedService";
+import { AlertEpisodeFeedEventType } from "../../Models/DatabaseModels/AlertEpisodeFeed";
+import { Gray500, Red500 } from "../../Types/BrandColors";
+import TeamService from "./TeamService";
+import Team from "../../Models/DatabaseModels/Team";
+import DeleteBy from "../Types/Database/DeleteBy";
+import AlertEpisodeService from "./AlertEpisodeService";
+import AlertEpisode from "../../Models/DatabaseModels/AlertEpisode";
+import WorkspaceNotificationRuleService from "./WorkspaceNotificationRuleService";
+import NotificationRuleEventType from "../../Types/Workspace/NotificationRules/EventType";
+import WorkspaceNotificationRule from "../../Models/DatabaseModels/WorkspaceNotificationRule";
+import logger from "../Utils/Logger";
+import CaptureSpan from "../Utils/Telemetry/CaptureSpan";
 
 export class Service extends DatabaseService<Model> {
   public constructor() {
     super(Model);
   }
+
+  @CaptureSpan()
+  protected override async onBeforeDelete(
+    deleteBy: DeleteBy<Model>,
+  ): Promise<OnDelete<Model>> {
+    const itemsToDelete: Model[] = await this.findBy({
+      query: deleteBy.query,
+      limit: deleteBy.limit,
+      skip: deleteBy.skip,
+      props: {
+        isRoot: true,
+      },
+      select: {
+        alertEpisodeId: true,
+        projectId: true,
+        teamId: true,
+      },
+    });
+
+    return {
+      carryForward: {
+        itemsToDelete: itemsToDelete,
+      },
+      deleteBy: deleteBy,
+    };
+  }
+
+  @CaptureSpan()
+  protected override async onDeleteSuccess(
+    onDelete: OnDelete<Model>,
+    _itemIdsBeforeDelete: Array<ObjectID>,
+  ): Promise<OnDelete<Model>> {
+    const deleteByUserId: ObjectID | undefined =
+      onDelete.deleteBy.deletedByUser?.id || onDelete.deleteBy.props.userId;
+
+    const itemsToDelete: Model[] = onDelete.carryForward.itemsToDelete;
+
+    for (const item of itemsToDelete) {
+      const alertEpisodeId: ObjectID | undefined = item.alertEpisodeId;
+      const projectId: ObjectID | undefined = item.projectId;
+      const teamId: ObjectID | undefined = item.teamId;
+
+      if (alertEpisodeId && teamId && projectId) {
+        const team: Team | null = await TeamService.findOneById({
+          id: teamId,
+          select: {
+            name: true,
+          },
+          props: {
+            isRoot: true,
+          },
+        });
+
+        const episodeNumberResult: {
+          number: number | null;
+          numberWithPrefix: string | null;
+        } = await AlertEpisodeService.getEpisodeNumber({
+          episodeId: alertEpisodeId,
+        });
+        const episodeNumberDisplay: string =
+          episodeNumberResult.numberWithPrefix ||
+          "#" + episodeNumberResult.number;
+
+        if (team && team.name) {
+          await AlertEpisodeFeedService.createAlertEpisodeFeedItem({
+            alertEpisodeId: alertEpisodeId,
+            projectId: projectId,
+            alertEpisodeFeedEventType:
+              AlertEpisodeFeedEventType.OwnerTeamRemoved,
+            displayColor: Red500,
+            feedInfoInMarkdown: `👨🏻‍👩🏻‍👦🏻 Removed team **${team.name}** from the [Episode ${episodeNumberDisplay}](${(await AlertEpisodeService.getEpisodeLinkInDashboard(projectId!, alertEpisodeId!)).toString()}) as the owner.`,
+            userId: deleteByUserId || undefined,
+            workspaceNotification: {
+              sendWorkspaceNotification: true,
+              notifyUserId: deleteByUserId || undefined,
+            },
+          });
+        }
+      }
+    }
+
+    return onDelete;
+  }
+
+  @CaptureSpan()
+  public override async onCreateSuccess(
+    onCreate: OnCreate<Model>,
+    createdItem: Model,
+  ): Promise<Model> {
+    const alertEpisodeId: ObjectID | undefined = createdItem.alertEpisodeId;
+    const projectId: ObjectID | undefined = createdItem.projectId;
+    const teamId: ObjectID | undefined = createdItem.teamId;
+    const createdByUserId: ObjectID | undefined =
+      createdItem.createdByUserId || onCreate.createBy.props.userId;
+
+    if (alertEpisodeId && teamId && projectId) {
+      const team: Team | null = await TeamService.findOneById({
+        id: teamId,
+        select: {
+          name: true,
+        },
+        props: {
+          isRoot: true,
+        },
+      });
+
+      if (team && team.name) {
+        const episodeNumberResult: {
+          number: number | null;
+          numberWithPrefix: string | null;
+        } = await AlertEpisodeService.getEpisodeNumber({
+          episodeId: alertEpisodeId,
+        });
+        const episodeNumberDisplay: string =
+          episodeNumberResult.numberWithPrefix ||
+          "#" + episodeNumberResult.number;
+
+        await AlertEpisodeFeedService.createAlertEpisodeFeedItem({
+          alertEpisodeId: alertEpisodeId,
+          projectId: projectId,
+          alertEpisodeFeedEventType:
+            AlertEpisodeFeedEventType.OwnerTeamAdded,
+          displayColor: Gray500,
+          feedInfoInMarkdown: `👨🏻‍👩🏻‍👦🏻 Added team **${team.name}** to the [Episode ${episodeNumberDisplay}](${(await AlertEpisodeService.getEpisodeLinkInDashboard(projectId!, alertEpisodeId!)).toString()}) as the owner.`,
+          userId: createdByUserId || undefined,
+          workspaceNotification: {
+            sendWorkspaceNotification: true,
+            notifyUserId: createdByUserId || undefined,
+          },
+        });
+      }
+
+      // get notification rule where inviteOwners is true.
+      const notificationRules: Array<WorkspaceNotificationRule> =
+        await WorkspaceNotificationRuleService.getNotificationRulesWhereInviteOwnersIsTrue(
+          {
+            projectId: projectId,
+            notificationFor: {
+              alertEpisodeId: alertEpisodeId,
+            },
+            notificationRuleEventType:
+              NotificationRuleEventType.AlertEpisode,
+          },
+        );
+
+      // Fetch episode to get workspace channels
+      const episode: AlertEpisode | null =
+        await AlertEpisodeService.findOneById({
+          id: alertEpisodeId,
+          select: {
+            postUpdatesToWorkspaceChannels: true,
+          },
+          props: {
+            isRoot: true,
+          },
+        });
+
+      if (episode) {
+        WorkspaceNotificationRuleService.inviteTeamsBasedOnRulesAndWorkspaceChannels(
+          {
+            notificationRules: notificationRules,
+            projectId: projectId,
+            workspaceChannels:
+              episode.postUpdatesToWorkspaceChannels || [],
+            teamIds: [teamId],
+          },
+        ).catch((error: Error) => {
+          logger.error(error);
+        });
+      }
+    }
+
+    return createdItem;
+  }
 }
 
 export default new Service();
diff --git a/Common/Server/Services/AlertEpisodeOwnerUserService.ts b/Common/Server/Services/AlertEpisodeOwnerUserService.ts
index e1b3a92798..7a27b95782 100644
--- a/Common/Server/Services/AlertEpisodeOwnerUserService.ts
+++ b/Common/Server/Services/AlertEpisodeOwnerUserService.ts
@@ -1,10 +1,192 @@
+import ObjectID from "../../Types/ObjectID";
 import DatabaseService from "./DatabaseService";
 import Model from "../../Models/DatabaseModels/AlertEpisodeOwnerUser";
+import AlertEpisodeFeedService from "./AlertEpisodeFeedService";
+import { AlertEpisodeFeedEventType } from "../../Models/DatabaseModels/AlertEpisodeFeed";
+import { Gray500, Red500 } from "../../Types/BrandColors";
+import User from "../../Models/DatabaseModels/User";
+import UserService from "./UserService";
+import { OnCreate, OnDelete } from "../Types/Database/Hooks";
+import DeleteBy from "../Types/Database/DeleteBy";
+import AlertEpisodeService from "./AlertEpisodeService";
+import AlertEpisode from "../../Models/DatabaseModels/AlertEpisode";
+import WorkspaceNotificationRuleService from "./WorkspaceNotificationRuleService";
+import NotificationRuleEventType from "../../Types/Workspace/NotificationRules/EventType";
+import WorkspaceNotificationRule from "../../Models/DatabaseModels/WorkspaceNotificationRule";
+import logger from "../Utils/Logger";
+import CaptureSpan from "../Utils/Telemetry/CaptureSpan";
 
 export class Service extends DatabaseService<Model> {
   public constructor() {
     super(Model);
   }
+
+  @CaptureSpan()
+  protected override async onBeforeDelete(
+    deleteBy: DeleteBy<Model>,
+  ): Promise<OnDelete<Model>> {
+    const itemsToDelete: Model[] = await this.findBy({
+      query: deleteBy.query,
+      limit: deleteBy.limit,
+      skip: deleteBy.skip,
+      props: {
+        isRoot: true,
+      },
+      select: {
+        alertEpisodeId: true,
+        projectId: true,
+        userId: true,
+      },
+    });
+
+    return {
+      carryForward: {
+        itemsToDelete: itemsToDelete,
+      },
+      deleteBy: deleteBy,
+    };
+  }
+
+  @CaptureSpan()
+  protected override async onDeleteSuccess(
+    onDelete: OnDelete<Model>,
+    _itemIdsBeforeDelete: Array<ObjectID>,
+  ): Promise<OnDelete<Model>> {
+    const deleteByUserId: ObjectID | undefined =
+      onDelete.deleteBy.deletedByUser?.id || onDelete.deleteBy.props.userId;
+
+    const itemsToDelete: Model[] = onDelete.carryForward.itemsToDelete;
+
+    for (const item of itemsToDelete) {
+      const alertEpisodeId: ObjectID | undefined = item.alertEpisodeId;
+      const projectId: ObjectID | undefined = item.projectId;
+      const userId: ObjectID | undefined = item.userId;
+
+      if (alertEpisodeId && userId && projectId) {
+        const user: User | null = await UserService.findOneById({
+          id: userId,
+          select: {
+            name: true,
+            email: true,
+          },
+          props: {
+            isRoot: true,
+          },
+        });
+
+        const episodeNumberResult: {
+          number: number | null;
+          numberWithPrefix: string | null;
+        } = await AlertEpisodeService.getEpisodeNumber({
+          episodeId: alertEpisodeId,
+        });
+        const episodeNumberDisplay: string =
+          episodeNumberResult.numberWithPrefix ||
+          "#" + episodeNumberResult.number;
+
+        if (user && user.name) {
+          await AlertEpisodeFeedService.createAlertEpisodeFeedItem({
+            alertEpisodeId: alertEpisodeId,
+            projectId: projectId,
+            alertEpisodeFeedEventType:
+              AlertEpisodeFeedEventType.OwnerUserRemoved,
+            displayColor: Red500,
+            feedInfoInMarkdown: `👨🏻‍💻 Removed **${user.name.toString()}** (${user.email?.toString()}) from the [Episode ${episodeNumberDisplay}](${(await AlertEpisodeService.getEpisodeLinkInDashboard(projectId!, alertEpisodeId!)).toString()}) as the owner.`,
+            userId: deleteByUserId || undefined,
+            workspaceNotification: {
+              sendWorkspaceNotification: true,
+              notifyUserId: userId || undefined,
+            },
+          });
+        }
+      }
+    }
+
+    return onDelete;
+  }
+
+  @CaptureSpan()
+  public override async onCreateSuccess(
+    onCreate: OnCreate<Model>,
+    createdItem: Model,
+  ): Promise<Model> {
+    const alertEpisodeId: ObjectID | undefined = createdItem.alertEpisodeId;
+    const projectId: ObjectID | undefined = createdItem.projectId;
+    const userId: ObjectID | undefined = createdItem.userId;
+    const createdByUserId: ObjectID | undefined =
+      createdItem.createdByUserId || onCreate.createBy.props.userId;
+
+    if (alertEpisodeId && userId && projectId) {
+      const episodeNumberResult: {
+        number: number | null;
+        numberWithPrefix: string | null;
+      } = await AlertEpisodeService.getEpisodeNumber({
+        episodeId: alertEpisodeId,
+      });
+      const episodeNumberDisplay: string =
+        episodeNumberResult.numberWithPrefix ||
+        "#" + episodeNumberResult.number;
+
+      await AlertEpisodeFeedService.createAlertEpisodeFeedItem({
+        alertEpisodeId: alertEpisodeId,
+        projectId: projectId,
+        alertEpisodeFeedEventType: AlertEpisodeFeedEventType.OwnerUserAdded,
+        displayColor: Gray500,
+        feedInfoInMarkdown: `👨🏻‍💻 Added **${await UserService.getUserMarkdownString(
+          {
+            userId: userId,
+            projectId: projectId,
+          },
+        )}** to the [Episode ${episodeNumberDisplay}](${(await AlertEpisodeService.getEpisodeLinkInDashboard(projectId!, alertEpisodeId!)).toString()}) as the owner.`,
+        userId: createdByUserId || undefined,
+        workspaceNotification: {
+          sendWorkspaceNotification: true,
+          notifyUserId: userId || undefined,
+        },
+      });
+
+      // get notification rule where inviteOwners is true.
+      const notificationRules: Array<WorkspaceNotificationRule> =
+        await WorkspaceNotificationRuleService.getNotificationRulesWhereInviteOwnersIsTrue(
+          {
+            projectId: projectId,
+            notificationFor: {
+              alertEpisodeId: alertEpisodeId,
+            },
+            notificationRuleEventType:
+              NotificationRuleEventType.AlertEpisode,
+          },
+        );
+
+      // Fetch episode to get workspace channels
+      const episode: AlertEpisode | null =
+        await AlertEpisodeService.findOneById({
+          id: alertEpisodeId,
+          select: {
+            postUpdatesToWorkspaceChannels: true,
+          },
+          props: {
+            isRoot: true,
+          },
+        });
+
+      if (episode) {
+        WorkspaceNotificationRuleService.inviteUsersBasedOnRulesAndWorkspaceChannels(
+          {
+            notificationRules: notificationRules,
+            projectId: projectId,
+            workspaceChannels:
+              episode.postUpdatesToWorkspaceChannels || [],
+            userIds: [userId],
+          },
+        ).catch((error: Error) => {
+          logger.error(error);
+        });
+      }
+    }
+
+    return createdItem;
+  }
 }
 
 export default new Service();
diff --git a/Common/Server/Services/AlertEpisodeStateTimelineService.ts b/Common/Server/Services/AlertEpisodeStateTimelineService.ts
index 9c31385070..c8b207b526 100644
--- a/Common/Server/Services/AlertEpisodeStateTimelineService.ts
+++ b/Common/Server/Services/AlertEpisodeStateTimelineService.ts
@@ -374,6 +374,11 @@ export class Service extends DatabaseService<AlertEpisodeStateTimeline> {
         ? `**Cause:** \n${createdItem.rootCause}`
         : undefined,
       userId: createdItem.createdByUserId || onCreate.createBy.props.userId,
+      workspaceNotification: {
+        sendWorkspaceNotification: true,
+        notifyUserId:
+          createdItem.createdByUserId || onCreate.createBy.props.userId,
+      },
     });
 
     return createdItem;
diff --git a/Common/Server/Services/IncidentEpisodeInternalNoteService.ts b/Common/Server/Services/IncidentEpisodeInternalNoteService.ts
index fdd95d1677..a171f4eae8 100644
--- a/Common/Server/Services/IncidentEpisodeInternalNoteService.ts
+++ b/Common/Server/Services/IncidentEpisodeInternalNoteService.ts
@@ -1,8 +1,16 @@
 import ObjectID from "../../Types/ObjectID";
 import DatabaseService from "./DatabaseService";
 import Model from "../../Models/DatabaseModels/IncidentEpisodeInternalNote";
+import { OnCreate, OnUpdate } from "../Types/Database/Hooks";
+import IncidentEpisodeFeedService from "./IncidentEpisodeFeedService";
+import { IncidentEpisodeFeedEventType } from "../../Models/DatabaseModels/IncidentEpisodeFeed";
+import { Blue500 } from "../../Types/BrandColors";
+import { LIMIT_PER_PROJECT } from "../../Types/Database/LimitMax";
+import IncidentEpisodeService from "./IncidentEpisodeService";
+import IncidentEpisode from "../../Models/DatabaseModels/IncidentEpisode";
 import CaptureSpan from "../Utils/Telemetry/CaptureSpan";
 import File from "../../Models/DatabaseModels/File";
+import FileAttachmentMarkdownUtil from "../Utils/FileAttachmentMarkdownUtil";
 
 export class Service extends DatabaseService<Model> {
   public constructor() {
@@ -66,6 +74,161 @@ export class Service extends DatabaseService<Model> {
 
     return existingNote !== null;
   }
+
+  @CaptureSpan()
+  public override async onCreateSuccess(
+    _onCreate: OnCreate<Model>,
+    createdItem: Model,
+  ): Promise<Model> {
+    const userId: ObjectID | null | undefined =
+      createdItem.createdByUserId || createdItem.createdByUser?.id;
+
+    const incidentEpisodeId: ObjectID = createdItem.incidentEpisodeId!;
+
+    const episodeNumberResult: {
+      number: number | null;
+      numberWithPrefix: string | null;
+    } = await IncidentEpisodeService.getEpisodeNumber({
+      episodeId: incidentEpisodeId,
+    });
+    const episodeNumberDisplay: string =
+      episodeNumberResult.numberWithPrefix ||
+      "#" + episodeNumberResult.number;
+
+    const attachmentsMarkdown: string = await this.getAttachmentsMarkdown(
+      createdItem.id!,
+      "/incident-episode-internal-note/attachment",
+    );
+
+    await IncidentEpisodeFeedService.createIncidentEpisodeFeedItem({
+      incidentEpisodeId: createdItem.incidentEpisodeId!,
+      projectId: createdItem.projectId!,
+      incidentEpisodeFeedEventType: IncidentEpisodeFeedEventType.PrivateNote,
+      displayColor: Blue500,
+      userId: userId || undefined,
+      feedInfoInMarkdown: `📄 posted **private note** for this [Episode ${episodeNumberDisplay}](${(await IncidentEpisodeService.getEpisodeLinkInDashboard(createdItem.projectId!, incidentEpisodeId)).toString()}):
+
+${(createdItem.note || "") + attachmentsMarkdown}
+          `,
+      workspaceNotification: {
+        sendWorkspaceNotification: true,
+        notifyUserId: userId || undefined,
+      },
+    });
+
+    return createdItem;
+  }
+
+  @CaptureSpan()
+  public override async onUpdateSuccess(
+    onUpdate: OnUpdate<Model>,
+    _updatedItemIds: Array<ObjectID>,
+  ): Promise<OnUpdate<Model>> {
+    if (onUpdate.updateBy.data.note) {
+      const updatedItems: Array<Model> = await this.findBy({
+        query: onUpdate.updateBy.query,
+        limit: LIMIT_PER_PROJECT,
+        skip: 0,
+        props: {
+          isRoot: true,
+        },
+        select: {
+          incidentEpisodeId: true,
+          incidentEpisode: {
+            projectId: true,
+            episodeNumber: true,
+            episodeNumberWithPrefix: true,
+          },
+          projectId: true,
+          note: true,
+          createdByUserId: true,
+          createdByUser: {
+            _id: true,
+          },
+        },
+      });
+
+      const userId: ObjectID | null | undefined =
+        onUpdate.updateBy.props.userId;
+
+      for (const updatedItem of updatedItems) {
+        const episode: IncidentEpisode = updatedItem.incidentEpisode!;
+
+        const attachmentsMarkdown: string = await this.getAttachmentsMarkdown(
+          updatedItem.id!,
+          "/incident-episode-internal-note/attachment",
+        );
+
+        await IncidentEpisodeFeedService.createIncidentEpisodeFeedItem({
+          incidentEpisodeId: updatedItem.incidentEpisodeId!,
+          projectId: updatedItem.projectId!,
+          incidentEpisodeFeedEventType: IncidentEpisodeFeedEventType.PrivateNote,
+          displayColor: Blue500,
+          userId: userId || undefined,
+          feedInfoInMarkdown: `📄 updated **Private Note** for this [Episode ${episode.episodeNumberWithPrefix || "#" + episode.episodeNumber}](${(await IncidentEpisodeService.getEpisodeLinkInDashboard(episode.projectId!, episode.id!)).toString()})
+
+${(updatedItem.note || "") + attachmentsMarkdown}
+          `,
+          workspaceNotification: {
+            sendWorkspaceNotification: true,
+            notifyUserId: userId || undefined,
+          },
+        });
+      }
+    }
+    return onUpdate;
+  }
+
+  private async getAttachmentsMarkdown(
+    modelId: ObjectID,
+    attachmentApiPath: string,
+  ): Promise<string> {
+    if (!modelId) {
+      return "";
+    }
+
+    const noteWithAttachments: Model | null = await this.findOneById({
+      id: modelId,
+      select: {
+        attachments: {
+          _id: true,
+        },
+      },
+      props: {
+        isRoot: true,
+      },
+    });
+
+    if (!noteWithAttachments || !noteWithAttachments.attachments) {
+      return "";
+    }
+
+    const attachmentIds: Array<ObjectID> = noteWithAttachments.attachments
+      .map((file: File) => {
+        if (file.id) {
+          return file.id;
+        }
+
+        if (file._id) {
+          return new ObjectID(file._id);
+        }
+
+        return null;
+      })
+      .filter((id: ObjectID | null): id is ObjectID => {
+        return Boolean(id);
+      });
+
+    if (!attachmentIds.length) {
+      return "";
+    }
+
+    return await FileAttachmentMarkdownUtil.buildAttachmentMarkdown({
+      modelId,
+      attachmentIds,
+      attachmentApiPath,
+    });
+  }
 }
 
 export default new Service();
diff --git a/Common/Server/Services/IncidentEpisodeOwnerTeamService.ts b/Common/Server/Services/IncidentEpisodeOwnerTeamService.ts
index a88cf45cc2..b13178627b 100644
--- a/Common/Server/Services/IncidentEpisodeOwnerTeamService.ts
+++ b/Common/Server/Services/IncidentEpisodeOwnerTeamService.ts
@@ -1,10 +1,200 @@
+import ObjectID from "../../Types/ObjectID";
+import { OnCreate, OnDelete } from "../Types/Database/Hooks";
 import DatabaseService from "./DatabaseService";
 import Model from "../../Models/DatabaseModels/IncidentEpisodeOwnerTeam";
+import IncidentEpisodeFeedService from "./IncidentEpisodeFeedService";
+import { IncidentEpisodeFeedEventType } from "../../Models/DatabaseModels/IncidentEpisodeFeed";
+import { Gray500, Red500 } from "../../Types/BrandColors";
+import TeamService from "./TeamService";
+import Team from "../../Models/DatabaseModels/Team";
+import DeleteBy from "../Types/Database/DeleteBy";
+import IncidentEpisodeService from "./IncidentEpisodeService";
+import IncidentEpisode from "../../Models/DatabaseModels/IncidentEpisode";
+import WorkspaceNotificationRuleService from "./WorkspaceNotificationRuleService";
+import NotificationRuleEventType from "../../Types/Workspace/NotificationRules/EventType";
+import WorkspaceNotificationRule from "../../Models/DatabaseModels/WorkspaceNotificationRule";
+import logger from "../Utils/Logger";
+import CaptureSpan from "../Utils/Telemetry/CaptureSpan";
 
 export class Service extends DatabaseService<Model> {
   public constructor() {
     super(Model);
   }
+
+  @CaptureSpan()
+  protected override async onBeforeDelete(
+    deleteBy: DeleteBy<Model>,
+  ): Promise<OnDelete<Model>> {
+    const itemsToDelete: Model[] = await this.findBy({
+      query: deleteBy.query,
+      limit: deleteBy.limit,
+      skip: deleteBy.skip,
+      props: {
+        isRoot: true,
+      },
+      select: {
+        incidentEpisodeId: true,
+        projectId: true,
+        teamId: true,
+      },
+    });
+
+    return {
+      carryForward: {
+        itemsToDelete: itemsToDelete,
+      },
+      deleteBy: deleteBy,
+    };
+  }
+
+  @CaptureSpan()
+  protected override async onDeleteSuccess(
+    onDelete: OnDelete<Model>,
+    _itemIdsBeforeDelete: Array<ObjectID>,
+  ): Promise<OnDelete<Model>> {
+    const deleteByUserId: ObjectID | undefined =
+      onDelete.deleteBy.deletedByUser?.id || onDelete.deleteBy.props.userId;
+
+    const itemsToDelete: Model[] = onDelete.carryForward.itemsToDelete;
+
+    for (const item of itemsToDelete) {
+      const incidentEpisodeId: ObjectID | undefined = item.incidentEpisodeId;
+      const projectId: ObjectID | undefined = item.projectId;
+      const teamId: ObjectID | undefined = item.teamId;
+
+      if (incidentEpisodeId && teamId && projectId) {
+        const team: Team | null = await TeamService.findOneById({
+          id: teamId,
+          select: {
+            name: true,
+          },
+          props: {
+            isRoot: true,
+          },
+        });
+
+        const episodeNumberResult: {
+          number: number | null;
+          numberWithPrefix: string | null;
+        } = await IncidentEpisodeService.getEpisodeNumber({
+          episodeId: incidentEpisodeId,
+        });
+        const episodeNumberDisplay: string =
+          episodeNumberResult.numberWithPrefix ||
+          "#" + episodeNumberResult.number;
+
+        if (team && team.name) {
+          await IncidentEpisodeFeedService.createIncidentEpisodeFeedItem({
+            incidentEpisodeId: incidentEpisodeId,
+            projectId: projectId,
+            incidentEpisodeFeedEventType:
+              IncidentEpisodeFeedEventType.OwnerTeamRemoved,
+            displayColor: Red500,
+            feedInfoInMarkdown: `👨🏻‍👩🏻‍👦🏻 Removed team **${team.name}** from the [Episode ${episodeNumberDisplay}](${(await IncidentEpisodeService.getEpisodeLinkInDashboard(projectId!, incidentEpisodeId!)).toString()}) as the owner.`,
+            userId: deleteByUserId || undefined,
+            workspaceNotification: {
+              sendWorkspaceNotification: true,
+              notifyUserId: deleteByUserId || undefined,
+            },
+          });
+        }
+      }
+    }
+
+    return onDelete;
+  }
+
+  @CaptureSpan()
+  public override async onCreateSuccess(
+    onCreate: OnCreate<Model>,
+    createdItem: Model,
+  ): Promise<Model> {
+    const incidentEpisodeId: ObjectID | undefined =
+      createdItem.incidentEpisodeId;
+    const projectId: ObjectID | undefined = createdItem.projectId;
+    const teamId: ObjectID | undefined = createdItem.teamId;
+    const createdByUserId: ObjectID | undefined =
+      createdItem.createdByUserId || onCreate.createBy.props.userId;
+
+    if (incidentEpisodeId && teamId && projectId) {
+      const team: Team | null = await TeamService.findOneById({
+        id: teamId,
+        select: {
+          name: true,
+        },
+        props: {
+          isRoot: true,
+        },
+      });
+
+      if (team && team.name) {
+        const episodeNumberResult: {
+          number: number | null;
+          numberWithPrefix: string | null;
+        } = await IncidentEpisodeService.getEpisodeNumber({
+          episodeId: incidentEpisodeId,
+        });
+        const episodeNumberDisplay: string =
+          episodeNumberResult.numberWithPrefix ||
+          "#" + episodeNumberResult.number;
+
+        await IncidentEpisodeFeedService.createIncidentEpisodeFeedItem({
+          incidentEpisodeId: incidentEpisodeId,
+          projectId: projectId,
+          incidentEpisodeFeedEventType:
+            IncidentEpisodeFeedEventType.OwnerTeamAdded,
+          displayColor: Gray500,
+          feedInfoInMarkdown: `👨🏻‍👩🏻‍👦🏻 Added team **${team.name}** to the [Episode ${episodeNumberDisplay}](${(await IncidentEpisodeService.getEpisodeLinkInDashboard(projectId!, incidentEpisodeId!)).toString()}) as the owner.`,
+          userId: createdByUserId || undefined,
+          workspaceNotification: {
+            sendWorkspaceNotification: true,
+            notifyUserId: createdByUserId || undefined,
+          },
+        });
+      }
+
+      // get notification rule where inviteOwners is true.
+      const notificationRules: Array<WorkspaceNotificationRule> =
+        await WorkspaceNotificationRuleService.getNotificationRulesWhereInviteOwnersIsTrue(
+          {
+            projectId: projectId,
+            notificationFor: {
+              incidentEpisodeId: incidentEpisodeId,
+            },
+            notificationRuleEventType:
+              NotificationRuleEventType.IncidentEpisode,
+          },
+        );
+
+      // Fetch episode to get workspace channels
+      const episode: IncidentEpisode | null =
+        await IncidentEpisodeService.findOneById({
+          id: incidentEpisodeId,
+          select: {
+            postUpdatesToWorkspaceChannels: true,
+          },
+          props: {
+            isRoot: true,
+          },
+        });
+
+      if (episode) {
+        WorkspaceNotificationRuleService.inviteTeamsBasedOnRulesAndWorkspaceChannels(
+          {
+            notificationRules: notificationRules,
+            projectId: projectId,
+            workspaceChannels:
+              episode.postUpdatesToWorkspaceChannels || [],
+            teamIds: [teamId],
+          },
+        ).catch((error: Error) => {
+          logger.error(error);
+        });
+      }
+    }
+
+    return createdItem;
+  }
 }
 
 export default new Service();
diff --git a/Common/Server/Services/IncidentEpisodeOwnerUserService.ts b/Common/Server/Services/IncidentEpisodeOwnerUserService.ts
index beb125b683..3b854fd3b4 100644
--- a/Common/Server/Services/IncidentEpisodeOwnerUserService.ts
+++ b/Common/Server/Services/IncidentEpisodeOwnerUserService.ts
@@ -1,10 +1,194 @@
+import ObjectID from "../../Types/ObjectID";
 import DatabaseService from "./DatabaseService";
 import Model from "../../Models/DatabaseModels/IncidentEpisodeOwnerUser";
+import IncidentEpisodeFeedService from "./IncidentEpisodeFeedService";
+import { IncidentEpisodeFeedEventType } from "../../Models/DatabaseModels/IncidentEpisodeFeed";
+import { Gray500, Red500 } from "../../Types/BrandColors";
+import User from "../../Models/DatabaseModels/User";
+import UserService from "./UserService";
+import { OnCreate, OnDelete } from "../Types/Database/Hooks";
+import DeleteBy from "../Types/Database/DeleteBy";
+import IncidentEpisodeService from "./IncidentEpisodeService";
+import IncidentEpisode from "../../Models/DatabaseModels/IncidentEpisode";
+import WorkspaceNotificationRuleService from "./WorkspaceNotificationRuleService";
+import NotificationRuleEventType from "../../Types/Workspace/NotificationRules/EventType";
+import WorkspaceNotificationRule from "../../Models/DatabaseModels/WorkspaceNotificationRule";
+import logger from "../Utils/Logger";
+import CaptureSpan from "../Utils/Telemetry/CaptureSpan";
 
 export class Service extends DatabaseService<Model> {
   public constructor() {
     super(Model);
   }
+
+  @CaptureSpan()
+  protected override async onBeforeDelete(
+    deleteBy: DeleteBy<Model>,
+  ): Promise<OnDelete<Model>> {
+    const itemsToDelete: Model[] = await this.findBy({
+      query: deleteBy.query,
+      limit: deleteBy.limit,
+      skip: deleteBy.skip,
+      props: {
+        isRoot: true,
+      },
+      select: {
+        incidentEpisodeId: true,
+        projectId: true,
+        userId: true,
+      },
+    });
+
+    return {
+      carryForward: {
+        itemsToDelete: itemsToDelete,
+      },
+      deleteBy: deleteBy,
+    };
+  }
+
+  @CaptureSpan()
+  protected override async onDeleteSuccess(
+    onDelete: OnDelete<Model>,
+    _itemIdsBeforeDelete: Array<ObjectID>,
+  ): Promise<OnDelete<Model>> {
+    const deleteByUserId: ObjectID | undefined =
+      onDelete.deleteBy.deletedByUser?.id || onDelete.deleteBy.props.userId;
+
+    const itemsToDelete: Model[] = onDelete.carryForward.itemsToDelete;
+
+    for (const item of itemsToDelete) {
+      const incidentEpisodeId: ObjectID | undefined = item.incidentEpisodeId;
+      const projectId: ObjectID | undefined = item.projectId;
+      const userId: ObjectID | undefined = item.userId;
+
+      if (incidentEpisodeId && userId && projectId) {
+        const user: User | null = await UserService.findOneById({
+          id: userId,
+          select: {
+            name: true,
+            email: true,
+          },
+          props: {
+            isRoot: true,
+          },
+        });
+
+        const episodeNumberResult: {
+          number: number | null;
+          numberWithPrefix: string | null;
+        } = await IncidentEpisodeService.getEpisodeNumber({
+          episodeId: incidentEpisodeId,
+        });
+        const episodeNumberDisplay: string =
+          episodeNumberResult.numberWithPrefix ||
+          "#" + episodeNumberResult.number;
+
+        if (user && user.name) {
+          await IncidentEpisodeFeedService.createIncidentEpisodeFeedItem({
+            incidentEpisodeId: incidentEpisodeId,
+            projectId: projectId,
+            incidentEpisodeFeedEventType:
+              IncidentEpisodeFeedEventType.OwnerUserRemoved,
+            displayColor: Red500,
+            feedInfoInMarkdown: `👨🏻‍💻 Removed **${user.name.toString()}** (${user.email?.toString()}) from the [Episode ${episodeNumberDisplay}](${(await IncidentEpisodeService.getEpisodeLinkInDashboard(projectId!, incidentEpisodeId!)).toString()}) as the owner.`,
+            userId: deleteByUserId || undefined,
+            workspaceNotification: {
+              sendWorkspaceNotification: true,
+              notifyUserId: userId || undefined,
+            },
+          });
+        }
+      }
+    }
+
+    return onDelete;
+  }
+
+  @CaptureSpan()
+  public override async onCreateSuccess(
+    onCreate: OnCreate<Model>,
+    createdItem: Model,
+  ): Promise<Model> {
+    const incidentEpisodeId: ObjectID | undefined =
+      createdItem.incidentEpisodeId;
+    const projectId: ObjectID | undefined = createdItem.projectId;
+    const userId: ObjectID | undefined = createdItem.userId;
+    const createdByUserId: ObjectID | undefined =
+      createdItem.createdByUserId || onCreate.createBy.props.userId;
+
+    if (incidentEpisodeId && userId && projectId) {
+      const episodeNumberResult: {
+        number: number | null;
+        numberWithPrefix: string | null;
+      } = await IncidentEpisodeService.getEpisodeNumber({
+        episodeId: incidentEpisodeId,
+      });
+      const episodeNumberDisplay: string =
+        episodeNumberResult.numberWithPrefix ||
+        "#" + episodeNumberResult.number;
+
+      await IncidentEpisodeFeedService.createIncidentEpisodeFeedItem({
+        incidentEpisodeId: incidentEpisodeId,
+        projectId: projectId,
+        incidentEpisodeFeedEventType:
+          IncidentEpisodeFeedEventType.OwnerUserAdded,
+        displayColor: Gray500,
+        feedInfoInMarkdown: `👨🏻‍💻 Added **${await UserService.getUserMarkdownString(
+          {
+            userId: userId,
+            projectId: projectId,
+          },
+        )}** to the [Episode ${episodeNumberDisplay}](${(await IncidentEpisodeService.getEpisodeLinkInDashboard(projectId!, incidentEpisodeId!)).toString()}) as the owner.`,
+        userId: createdByUserId || undefined,
+        workspaceNotification: {
+          sendWorkspaceNotification: true,
+          notifyUserId: userId || undefined,
+        },
+      });
+
+      // get notification rule where inviteOwners is true.
+      const notificationRules: Array<WorkspaceNotificationRule> =
+        await WorkspaceNotificationRuleService.getNotificationRulesWhereInviteOwnersIsTrue(
+          {
+            projectId: projectId,
+            notificationFor: {
+              incidentEpisodeId: incidentEpisodeId,
+            },
+            notificationRuleEventType:
+              NotificationRuleEventType.IncidentEpisode,
+          },
+        );
+
+      // Fetch episode to get workspace channels
+      const episode: IncidentEpisode | null =
+        await IncidentEpisodeService.findOneById({
+          id: incidentEpisodeId,
+          select: {
+            postUpdatesToWorkspaceChannels: true,
+          },
+          props: {
+            isRoot: true,
+          },
+        });
+
+      if (episode) {
+        WorkspaceNotificationRuleService.inviteUsersBasedOnRulesAndWorkspaceChannels(
+          {
+            notificationRules: notificationRules,
+            projectId: projectId,
+            workspaceChannels:
+              episode.postUpdatesToWorkspaceChannels || [],
+            userIds: [userId],
+          },
+        ).catch((error: Error) => {
+          logger.error(error);
+        });
+      }
+    }
+
+    return createdItem;
+  }
 }
 
 export default new Service();
diff --git a/Common/Server/Services/IncidentEpisodePublicNoteService.ts b/Common/Server/Services/IncidentEpisodePublicNoteService.ts
index 23e146940d..522d5fa53f 100644
--- a/Common/Server/Services/IncidentEpisodePublicNoteService.ts
+++ b/Common/Server/Services/IncidentEpisodePublicNoteService.ts
@@ -140,6 +140,10 @@ export class Service extends DatabaseService<Model> {
 
 ${(createdItem.note || "") + attachmentsMarkdown}
           `,
+      workspaceNotification: {
+        sendWorkspaceNotification: true,
+        notifyUserId: userId || undefined,
+      },
     });
 
     return createdItem;
@@ -196,6 +200,10 @@ ${(createdItem.note || "") + attachmentsMarkdown}
 
 ${(updatedItem.note || "") + attachmentsMarkdown}
                   `,
+          workspaceNotification: {
+            sendWorkspaceNotification: true,
+            notifyUserId: userId || undefined,
+          },
         });
       }
     }
diff --git a/Common/Server/Services/IncidentEpisodeStateTimelineService.ts b/Common/Server/Services/IncidentEpisodeStateTimelineService.ts
index 566fecfe32..632a273967 100644
--- a/Common/Server/Services/IncidentEpisodeStateTimelineService.ts
+++ b/Common/Server/Services/IncidentEpisodeStateTimelineService.ts
@@ -383,6 +383,11 @@ export class Service extends DatabaseService<IncidentEpisodeStateTimeline> {
         ? `**Cause:** \n${createdItem.rootCause}`
         : undefined,
       userId: createdItem.createdByUserId || onCreate.createBy.props.userId,
+      workspaceNotification: {
+        sendWorkspaceNotification: true,
+        notifyUserId:
+          createdItem.createdByUserId || onCreate.createBy.props.userId,
+      },
     });
 
     return createdItem;