diff --git a/packages/catalog-model/src/EntityPolicies.ts b/packages/catalog-model/src/EntityPolicies.ts
index 3dc7deae7c..120de5152e 100644
--- a/packages/catalog-model/src/EntityPolicies.ts
+++ b/packages/catalog-model/src/EntityPolicies.ts
@@ -24,6 +24,7 @@ import {
 } from './entity';
 import {
   ComponentEntityV1alpha1Policy,
+  GroupEntityV1alpha1Policy,
   LocationEntityV1alpha1Policy,
   TemplateEntityV1alpha1Policy,
 } from './kinds';
@@ -74,6 +75,7 @@ export class EntityPolicies implements EntityPolicy {
       ]),
       EntityPolicies.anyOf([
         new ComponentEntityV1alpha1Policy(),
+        new GroupEntityV1alpha1Policy(),
         new LocationEntityV1alpha1Policy(),
         new TemplateEntityV1alpha1Policy(),
       ]),
diff --git a/packages/catalog-model/src/kinds/GroupEntityV1alpha1.test.ts b/packages/catalog-model/src/kinds/GroupEntityV1alpha1.test.ts
new file mode 100644
index 0000000000..c0a98685e9
--- /dev/null
+++ b/packages/catalog-model/src/kinds/GroupEntityV1alpha1.test.ts
@@ -0,0 +1,116 @@
+/*
+ * Copyright 2020 Spotify AB
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import { EntityPolicy } from '../types';
+import {
+  GroupEntityV1alpha1,
+  GroupEntityV1alpha1Policy,
+} from './GroupEntityV1alpha1';
+
+describe('GroupV1alpha1Policy', () => {
+  let entity: GroupEntityV1alpha1;
+  let policy: EntityPolicy;
+
+  beforeEach(() => {
+    entity = {
+      apiVersion: 'backstage.io/v1alpha1',
+      kind: 'Group',
+      metadata: {
+        name: 'doe-squad',
+        title: 'Doe Squad',
+        description: 'A squad for John and Jane',
+      },
+      spec: {
+        type: 'squad',
+        owner: 'me',
+        parent: ['group a'],
+        ancestors: ['group-a', 'global-synergies', 'acme-corp'],
+        children: [],
+        grandchildren: [],
+      },
+    };
+    policy = new GroupEntityV1alpha1Policy();
+  });
+
+  it('happy path: accepts valid data', async () => {
+    await expect(policy.enforce(entity)).resolves.toBe(entity);
+  });
+
+  it('silently accepts v1beta1 as well', async () => {
+    (entity as any).apiVersion = 'backstage.io/v1beta1';
+    await expect(policy.enforce(entity)).resolves.toBe(entity);
+  });
+
+  it('rejects unknown apiVersion', async () => {
+    (entity as any).apiVersion = 'backstage.io/v1beta0';
+    await expect(policy.enforce(entity)).rejects.toThrow(/apiVersion/);
+  });
+
+  it('rejects unknown kind', async () => {
+    (entity as any).kind = 'Wizard';
+    await expect(policy.enforce(entity)).rejects.toThrow(/kind/);
+  });
+
+  it('rejects missing type', async () => {
+    delete (entity as any).spec.type;
+    await expect(policy.enforce(entity)).rejects.toThrow(/type/);
+  });
+
+  it('rejects wrong type', async () => {
+    (entity as any).spec.type = 7;
+    await expect(policy.enforce(entity)).rejects.toThrow(/type/);
+  });
+
+  it('rejects empty type', async () => {
+    (entity as any).spec.type = '';
+    await expect(policy.enforce(entity)).rejects.toThrow(/type/);
+  });
+
+  it('rejects missing owner', async () => {
+    delete (entity as any).spec.owner;
+    await expect(policy.enforce(entity)).rejects.toThrow(/owner/);
+  });
+
+  it('rejects wrong owner', async () => {
+    (entity as any).spec.owner = 7;
+    await expect(policy.enforce(entity)).rejects.toThrow(/owner/);
+  });
+
+  it('rejects empty owner', async () => {
+    (entity as any).spec.owner = '';
+    await expect(policy.enforce(entity)).rejects.toThrow(/owner/);
+  });
+
+  it('accepts missing parent', async () => {
+    delete (entity as any).spec.parent;
+    await expect(policy.enforce(entity)).resolves.toBe(entity);
+  });
+
+  it('accepts missing ancestors', async () => {
+    delete (entity as any).spec.ancestors;
+    await expect(policy.enforce(entity)).resolves.toBe(entity);
+  });
+
+  it('accepts missing children', async () => {
+    delete (entity as any).spec.children;
+    await expect(policy.enforce(entity)).resolves.toBe(entity);
+  });
+
+  it('accepts missing grandchildren', async () => {
+    delete (entity as any).spec.grandchildren;
+    await expect(policy.enforce(entity)).resolves.toBe(entity);
+  });
+});
diff --git a/packages/catalog-model/src/kinds/GroupEntityV1alpha1.ts b/packages/catalog-model/src/kinds/GroupEntityV1alpha1.ts
new file mode 100644
index 0000000000..f7902dbd86
--- /dev/null
+++ b/packages/catalog-model/src/kinds/GroupEntityV1alpha1.ts
@@ -0,0 +1,60 @@
+/*
+ * Copyright 2020 Spotify AB
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import * as yup from 'yup';
+import type { Entity } from '../entity/Entity';
+import type { EntityPolicy } from '../types';
+
+const API_VERSION = ['backstage.io/v1alpha1', 'backstage.io/v1beta1'] as const;
+const KIND = 'Group' as const;
+
+export interface GroupEntityV1alpha1 extends Entity {
+  apiVersion: typeof API_VERSION[number];
+  kind: typeof KIND;
+  spec: {
+    type: string;
+    owner: string;
+    parent?: string[];
+    ancestors?: string[];
+    children?: string[];
+    grandchildren?: string[];
+  };
+}
+
+export class GroupEntityV1alpha1Policy implements EntityPolicy {
+  private schema: yup.Schema<any>;
+
+  constructor() {
+    this.schema = yup.object<Partial<GroupEntityV1alpha1>>({
+      apiVersion: yup.string().required().oneOf(API_VERSION),
+      kind: yup.string().required().equals([KIND]),
+      spec: yup
+        .object({
+          type: yup.string().required().min(1),
+          owner: yup.string().required().min(1),
+          parent: yup.array(yup.string()).notRequired(),
+          ancestors: yup.array(yup.string()).notRequired(),
+          children: yup.array(yup.string()).notRequired(),
+          grandchildren: yup.array(yup.string()).notRequired(),
+        })
+        .required(),
+    });
+  }
+
+  async enforce(envelope: Entity): Promise<Entity> {
+    return await this.schema.validate(envelope, { strict: true });
+  }
+}
diff --git a/packages/catalog-model/src/kinds/index.ts b/packages/catalog-model/src/kinds/index.ts
index b5fad184d4..4526e99da4 100644
--- a/packages/catalog-model/src/kinds/index.ts
+++ b/packages/catalog-model/src/kinds/index.ts
@@ -19,6 +19,11 @@ export type {
   ComponentEntityV1alpha1 as ComponentEntity,
   ComponentEntityV1alpha1,
 } from './ComponentEntityV1alpha1';
+export { GroupEntityV1alpha1Policy } from './GroupEntityV1alpha1';
+export type {
+  GroupEntityV1alpha1 as GroupEntity,
+  GroupEntityV1alpha1,
+} from './GroupEntityV1alpha1';
 export { LocationEntityV1alpha1Policy } from './LocationEntityV1alpha1';
 export type {
   LocationEntityV1alpha1 as LocationEntity,