diff --git a/.github/workflows/db-migration.yml b/.github/workflows/db-migration.yml
index e618a7f..9eef53d 100644
--- a/.github/workflows/db-migration.yml
+++ b/.github/workflows/db-migration.yml
@@ -4,6 +4,7 @@ on:
   pull_request:
     paths:
       - 'prisma/schema.prisma'
+      - 'prisma.config.ts'
       - 'prisma/migrations/**'
 
 permissions:
diff --git a/prisma.config.ts b/prisma.config.ts
index 5a946fe..3bb4f68 100644
--- a/prisma.config.ts
+++ b/prisma.config.ts
@@ -1,3 +1,14 @@
+
+import { defineConfig } from "prisma/config";
+
+const databaseUrl =
+  process.env.DATABASE_URL ??
+  "postgresql://test_user:test_password@localhost:5432/test_db";
+
+export default defineConfig({
+  schema: "prisma/schema.prisma",
+  datasource: {
+    url: databaseUrl,
 import { defineConfig } from '@prisma/config';
 
 export default defineConfig({
diff --git a/prisma/migrations/20260622080500_create_organization_entity/migration.sql b/prisma/migrations/20260622080500_create_organization_entity/migration.sql
new file mode 100644
index 0000000..809a0dd
--- /dev/null
+++ b/prisma/migrations/20260622080500_create_organization_entity/migration.sql
@@ -0,0 +1,44 @@
+-- CreateTable
+CREATE TABLE "organizations" (
+    "id" TEXT NOT NULL,
+    "name" TEXT NOT NULL,
+    "slug" TEXT NOT NULL,
+    "ownerId" TEXT NOT NULL,
+    "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "updatedAt" TIMESTAMP(3) NOT NULL,
+
+    CONSTRAINT "organizations_pkey" PRIMARY KEY ("id")
+);
+
+-- CreateTable
+CREATE TABLE "organization_members" (
+    "id" TEXT NOT NULL,
+    "organizationId" TEXT NOT NULL,
+    "userId" TEXT NOT NULL,
+    "role" TEXT NOT NULL DEFAULT 'member',
+    "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "updatedAt" TIMESTAMP(3) NOT NULL,
+
+    CONSTRAINT "organization_members_pkey" PRIMARY KEY ("id")
+);
+
+-- CreateIndex
+CREATE UNIQUE INDEX "organizations_slug_key" ON "organizations"("slug");
+
+-- CreateIndex
+CREATE INDEX "organizations_ownerId_idx" ON "organizations"("ownerId");
+
+-- CreateIndex
+CREATE INDEX "organization_members_userId_idx" ON "organization_members"("userId");
+
+-- CreateIndex
+CREATE UNIQUE INDEX "organization_members_organizationId_userId_key" ON "organization_members"("organizationId", "userId");
+
+-- AddForeignKey
+ALTER TABLE "organizations" ADD CONSTRAINT "organizations_ownerId_fkey" FOREIGN KEY ("ownerId") REFERENCES "users"("id") ON DELETE RESTRICT ON UPDATE CASCADE;
+
+-- AddForeignKey
+ALTER TABLE "organization_members" ADD CONSTRAINT "organization_members_organizationId_fkey" FOREIGN KEY ("organizationId") REFERENCES "organizations"("id") ON DELETE CASCADE ON UPDATE CASCADE;
+
+-- AddForeignKey
+ALTER TABLE "organization_members" ADD CONSTRAINT "organization_members_userId_fkey" FOREIGN KEY ("userId") REFERENCES "users"("id") ON DELETE CASCADE ON UPDATE CASCADE;
diff --git a/prisma/schema.prisma b/prisma/schema.prisma
index 79988ca..342f900 100644
--- a/prisma/schema.prisma
+++ b/prisma/schema.prisma
@@ -7,25 +7,58 @@ datasource db {
 }
 
 model User {
-  id        String   @id @default(cuid())
-  email     String   @unique
-  createdAt DateTime @default(now())
-  alerts    Alert[]
-  watchlist Watchlist[]
+  id                      String                   @id @default(cuid())
+  email                   String                   @unique
+  createdAt               DateTime                 @default(now())
+  alerts                  Alert[]
+  watchlist               Watchlist[]
   notificationPreferences NotificationPreference[]
   auditLogs               AuditLog[]
+  ownedOrganizations      Organization[]           @relation("OrganizationOwner")
+  organizationMemberships OrganizationMember[]
 
   @@map("users")
 }
 
+model Organization {
+  id        String   @id @default(cuid())
+  name      String
+  slug      String   @unique
+  ownerId   String
+  createdAt DateTime @default(now())
+  updatedAt DateTime @updatedAt
+
+  owner   User                 @relation("OrganizationOwner", fields: [ownerId], references: [id])
+  members OrganizationMember[]
+
+  @@index([ownerId])
+  @@map("organizations")
+}
+
+model OrganizationMember {
+  id             String   @id @default(cuid())
+  organizationId String
+  userId         String
+  role           String   @default("member")
+  createdAt      DateTime @default(now())
+  updatedAt      DateTime @updatedAt
+
+  organization Organization @relation(fields: [organizationId], references: [id], onDelete: Cascade)
+  user         User         @relation(fields: [userId], references: [id], onDelete: Cascade)
+
+  @@unique([organizationId, userId])
+  @@index([userId])
+  @@map("organization_members")
+}
+
 model Alert {
-  id        String      @id @default(cuid())
+  id        String   @id @default(cuid())
   userId    String
   message   String
   severity  String
-  status    String      @default("open")
-  createdAt DateTime    @default(now())
-  updatedAt DateTime    @updatedAt
+  status    String   @default("open")
+  createdAt DateTime @default(now())
+  updatedAt DateTime @updatedAt
 
   acknowledgedAt DateTime?
   acknowledgedBy String?
@@ -86,8 +119,8 @@ model Proposal {
   createdAt   DateTime @default(now())
   updatedAt   DateTime @updatedAt
 
-  votes       Vote[]
-  events      GovernanceEvent[]
+  votes  Vote[]
+  events GovernanceEvent[]
 
   @@map("proposals")
 }
@@ -96,25 +129,25 @@ model Vote {
   id         String   @id @default(cuid())
   proposalId String
   voter      String
-  choice     String   // "yes", "no", "abstain"
+  choice     String // "yes", "no", "abstain"
   weight     String
   createdAt  DateTime @default(now())
 
-  proposal   Proposal @relation(fields: [proposalId], references: [id])
+  proposal Proposal @relation(fields: [proposalId], references: [id])
 
   @@map("votes")
 }
 
 model GovernanceEvent {
   id              String   @id @default(cuid())
-  eventType       String   // "proposal_created", "vote_cast"
+  eventType       String // "proposal_created", "vote_cast"
   proposalId      String?
   voter           String?
   transactionHash String   @unique
   metadata        Json?
   createdAt       DateTime @default(now())
 
-  proposal        Proposal? @relation(fields: [proposalId], references: [id])
+  proposal Proposal? @relation(fields: [proposalId], references: [id])
 
   @@map("governance_events")
 }
@@ -124,17 +157,17 @@ model GovernanceEvent {
 // ---------------------------------------------------------------------------
 
 model InvestigationNote {
-  id         String   @id @default(cuid())
+  id         String    @id @default(cuid())
   caseId     String
   authorId   String
   authorName String
   title      String?
   content    String
   tags       String[]
-  deleted    Boolean  @default(false)
+  deleted    Boolean   @default(false)
   deletedAt  DateTime?
-  createdAt  DateTime @default(now())
-  updatedAt  DateTime @updatedAt
+  createdAt  DateTime  @default(now())
+  updatedAt  DateTime  @updatedAt
 
   auditEntries NoteAuditLog[]
 
@@ -145,7 +178,7 @@ model InvestigationNote {
 model NoteAuditLog {
   id             String   @id @default(cuid())
   noteId         String
-  action         String   // "created" | "updated" | "deleted"
+  action         String // "created" | "updated" | "deleted"
   actorId        String
   actorName      String
   previousValues Json?
@@ -156,4 +189,4 @@ model NoteAuditLog {
 
   @@index([noteId])
   @@map("note_audit_logs")
-}
\ No newline at end of file
+}