diff --git a/apps/server/src/api/v2/users/index.ts b/apps/server/src/api/v2/users/index.ts
index a4fdeb5dc..c57880799 100644
--- a/apps/server/src/api/v2/users/index.ts
+++ b/apps/server/src/api/v2/users/index.ts
@@ -7,6 +7,8 @@ const app = new Hono()
   // Apply authentication globally to ALL routes in this router
   .use('*', requireAuth)
   .get('/', (c) => {
+    const _user = c.get('busterUser');
+
     // Stub data for user listing (only accessible to authenticated users)
     const stubUsers = [
       { id: '1', name: 'John Doe', email: 'john@example.com', role: 'admin' },
diff --git a/packages/database/src/queries/users/index.ts b/packages/database/src/queries/users/index.ts
index e5abc8565..6e4f8a7e4 100644
--- a/packages/database/src/queries/users/index.ts
+++ b/packages/database/src/queries/users/index.ts
@@ -1 +1,2 @@
 export * from './user';
+export * from './users-to-organizations';
diff --git a/packages/database/src/queries/users/users-to-organizations.test.ts b/packages/database/src/queries/users/users-to-organizations.test.ts
new file mode 100644
index 000000000..41c5f502c
--- /dev/null
+++ b/packages/database/src/queries/users/users-to-organizations.test.ts
@@ -0,0 +1,133 @@
+import { beforeEach, describe, expect, test, vi } from 'vitest';
+import { getUserOrganizationId } from '../organizations/organizations';
+import { getUserToOrganization } from './users-to-organizations';
+
+// Mock the organizations module
+vi.mock('../organizations/organizations', () => ({
+  getUserOrganizationId: vi.fn(),
+}));
+
+// Mock the database connection
+vi.mock('../../connection', () => ({
+  db: {
+    select: vi.fn(() => ({
+      from: vi.fn(() => ({
+        innerJoin: vi.fn(() => ({
+          where: vi.fn(() => Promise.resolve([])),
+        })),
+      })),
+    })),
+  },
+}));
+
+describe('getUserToOrganization', () => {
+  const mockGetUserOrganizationId = vi.mocked(getUserOrganizationId);
+
+  beforeEach(() => {
+    vi.clearAllMocks();
+  });
+
+  test('should throw error when user is not found in any organization', async () => {
+    // Arrange
+    mockGetUserOrganizationId.mockResolvedValue(null);
+
+    // Act & Assert
+    await expect(
+      getUserToOrganization({ userId: '123e4567-e89b-12d3-a456-426614174000' })
+    ).rejects.toThrow('User not found in any organization');
+  });
+
+  test('should return users in the same organization without filters', async () => {
+    // Arrange
+    const mockUsers = [
+      {
+        id: '123e4567-e89b-12d3-a456-426614174000',
+        name: 'John Doe',
+        email: 'john@example.com',
+        avatarUrl: null,
+        role: 'querier',
+        status: 'active',
+      },
+      {
+        id: '123e4567-e89b-12d3-a456-426614174001',
+        name: 'Jane Smith',
+        email: 'jane@example.com',
+        avatarUrl: 'https://example.com/avatar.jpg',
+        role: 'workspace_admin',
+        status: 'active',
+      },
+    ];
+
+    mockGetUserOrganizationId.mockResolvedValue({
+      organizationId: 'org-123',
+      role: 'querier',
+    });
+
+    const { db } = await import('../../connection');
+    const mockDb = vi.mocked(db);
+
+    mockDb.select.mockReturnValue({
+      from: vi.fn().mockReturnValue({
+        innerJoin: vi.fn().mockReturnValue({
+          where: vi.fn().mockResolvedValue(mockUsers),
+        }),
+      }),
+    } as unknown as ReturnType<typeof db.select>);
+
+    // Act
+    const result = await getUserToOrganization({
+      userId: '123e4567-e89b-12d3-a456-426614174000',
+    });
+
+    // Assert
+    expect(result).toEqual(mockUsers);
+    expect(mockGetUserOrganizationId).toHaveBeenCalledWith('123e4567-e89b-12d3-a456-426614174000');
+  });
+
+  test('should apply userName filter when provided', async () => {
+    // Arrange
+    const mockUsers = [
+      {
+        id: '123e4567-e89b-12d3-a456-426614174000',
+        name: 'John Doe',
+        email: 'john@example.com',
+        avatarUrl: null,
+        role: 'querier',
+        status: 'active',
+      },
+    ];
+
+    mockGetUserOrganizationId.mockResolvedValue({
+      organizationId: 'org-123',
+      role: 'querier',
+    });
+
+    const { db } = await import('../../connection');
+    const mockDb = vi.mocked(db);
+
+    mockDb.select.mockReturnValue({
+      from: vi.fn().mockReturnValue({
+        innerJoin: vi.fn().mockReturnValue({
+          where: vi.fn().mockResolvedValue(mockUsers),
+        }),
+      }),
+    } as unknown as ReturnType<typeof db.select>);
+
+    // Act
+    const result = await getUserToOrganization({
+      userId: '123e4567-e89b-12d3-a456-426614174000',
+      filters: { userName: 'John' },
+    });
+
+    // Assert
+    expect(result).toEqual(mockUsers);
+    expect(mockGetUserOrganizationId).toHaveBeenCalledWith('123e4567-e89b-12d3-a456-426614174000');
+  });
+
+  test('should validate input with invalid UUID', async () => {
+    // Act & Assert
+    await expect(getUserToOrganization({ userId: 'invalid-uuid' })).rejects.toThrow(
+      'User ID must be a valid UUID'
+    );
+  });
+});
diff --git a/packages/database/src/queries/users/users-to-organizations.ts b/packages/database/src/queries/users/users-to-organizations.ts
new file mode 100644
index 000000000..d4798b14e
--- /dev/null
+++ b/packages/database/src/queries/users/users-to-organizations.ts
@@ -0,0 +1,90 @@
+import { and, eq, isNull, like } from 'drizzle-orm';
+import { z } from 'zod';
+import { db } from '../../connection';
+import { users, usersToOrganizations } from '../../schema';
+import { getUserOrganizationId } from '../organizations/organizations';
+
+// Input schema for type safety
+const GetUserToOrganizationInputSchema = z.object({
+  userId: z.string().uuid('User ID must be a valid UUID'),
+  filters: z
+    .object({
+      userName: z.string().optional(),
+      email: z.string().optional(),
+    })
+    .optional(),
+});
+
+export type GetUserToOrganizationInput = z.infer<typeof GetUserToOrganizationInputSchema>;
+
+// Output schema for type safety
+export const UserOutputSchema = z.object({
+  id: z.string().uuid(),
+  name: z.string().nullable(),
+  email: z.string(),
+  avatarUrl: z.string().nullable(),
+  role: z.string(),
+  status: z.string(),
+});
+
+export type UserWithRole = z.infer<typeof UserOutputSchema>;
+
+export const getUserToOrganization = async ({
+  userId,
+  filters,
+}: GetUserToOrganizationInput): Promise<UserWithRole[]> => {
+  // Validate input
+  const validated = GetUserToOrganizationInputSchema.parse({ userId, filters });
+
+  try {
+    // First, get the user's organization ID using the existing function
+    const userOrg = await getUserOrganizationId(validated.userId);
+
+    if (!userOrg) {
+      throw new Error('User not found in any organization');
+    }
+
+    const organizationId = userOrg.organizationId;
+
+    // Build the where conditions for the join
+    const joinConditions = and(
+      eq(users.id, usersToOrganizations.userId),
+      eq(usersToOrganizations.organizationId, organizationId),
+      isNull(usersToOrganizations.deletedAt)
+    );
+
+    // Build the where conditions for filtering
+    const conditions = [];
+    if (validated.filters?.userName) {
+      conditions.push(like(users.name, `%${validated.filters.userName}%`));
+    }
+    if (validated.filters?.email) {
+      conditions.push(like(users.email, `%${validated.filters.email}%`));
+    }
+
+    const baseQuery = db
+      .select({
+        id: users.id,
+        name: users.name,
+        email: users.email,
+        avatarUrl: users.avatarUrl,
+        role: usersToOrganizations.role,
+        status: usersToOrganizations.status,
+      })
+      .from(users)
+      .innerJoin(usersToOrganizations, joinConditions);
+
+    const results =
+      conditions.length > 0
+        ? await baseQuery.where(conditions.length === 1 ? conditions[0] : and(...conditions))
+        : await baseQuery;
+
+    // Validate and return results
+    return results.map((user) => UserOutputSchema.parse(user));
+  } catch (error) {
+    if (error instanceof z.ZodError) {
+      throw new Error(`Invalid input: ${error.errors.map((e) => e.message).join(', ')}`);
+    }
+    throw error;
+  }
+};