diff --git a/frontend/tests/EngagementDetailPage.test.tsx b/frontend/tests/EngagementDetailPage.test.tsx
new file mode 100644
index 0000000..741beb6
--- /dev/null
+++ b/frontend/tests/EngagementDetailPage.test.tsx
@@ -0,0 +1,94 @@
+import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest';
+import { screen, waitFor } from '@testing-library/react';
+import { Route, Routes } from 'react-router-dom';
+import MockAdapter from 'axios-mock-adapter';
+import { apiClient } from '@/api/client';
+import { EngagementDetailPage } from '@/pages/EngagementDetailPage';
+import { renderWithProviders } from './utils';
+import type { Engagement } from '@/api/types';
+
+vi.mock('@/api/exports', () => ({
+  downloadEngagementExport: vi.fn(),
+}));
+
+const ENGAGEMENT: Engagement = {
+  id: 1,
+  name: 'Test Engagement',
+  description: 'A test engagement',
+  start_date: '2026-06-01',
+  end_date: null,
+  status: 'active',
+  created_at: '2026-06-01T08:00:00',
+  created_by: { id: 1, username: 'alice' },
+};
+
+type MockRole = 'admin' | 'redteam' | 'soc';
+let mockRole: MockRole = 'admin';
+
+function DetailPage() {
+  return (
+    <Routes>
+      <Route path="/engagements/:id" element={<EngagementDetailPage />} />
+    </Routes>
+  );
+}
+
+vi.mock('@/hooks/useAuth', () => ({
+  useAuth: () => ({
+    user: { id: 1, username: 'alice', role: mockRole, created_at: '2026-01-01' },
+    status: 'authenticated',
+    login: vi.fn(),
+    logout: vi.fn(),
+    isAdmin: mockRole === 'admin',
+    isRedteam: mockRole === 'redteam',
+    isSoc: mockRole === 'soc',
+    canEditEngagements: mockRole === 'admin' || mockRole === 'redteam',
+  }),
+}));
+
+describe('EngagementDetailPage — RBAC for Export button', () => {
+  let mock: MockAdapter;
+
+  beforeEach(() => {
+    mock = new MockAdapter(apiClient);
+    mock.onGet('/engagements/1').reply(200, ENGAGEMENT);
+    mock.onGet('/engagements/1/simulations').reply(200, []);
+  });
+
+  afterEach(() => {
+    mock.restore();
+  });
+
+  it('admin sees Export button', async () => {
+    mockRole = 'admin';
+    renderWithProviders(<DetailPage />, {
+      routerProps: { initialEntries: ['/engagements/1'] },
+    });
+    await waitFor(() => {
+      expect(screen.getByText('Test Engagement')).toBeInTheDocument();
+    });
+    expect(screen.getByTestId('export-dropdown')).toBeInTheDocument();
+  });
+
+  it('redteam sees Export button', async () => {
+    mockRole = 'redteam';
+    renderWithProviders(<DetailPage />, {
+      routerProps: { initialEntries: ['/engagements/1'] },
+    });
+    await waitFor(() => {
+      expect(screen.getByText('Test Engagement')).toBeInTheDocument();
+    });
+    expect(screen.getByTestId('export-dropdown')).toBeInTheDocument();
+  });
+
+  it('soc does NOT see Export button', async () => {
+    mockRole = 'soc';
+    renderWithProviders(<DetailPage />, {
+      routerProps: { initialEntries: ['/engagements/1'] },
+    });
+    await waitFor(() => {
+      expect(screen.getByText('Test Engagement')).toBeInTheDocument();
+    });
+    expect(screen.queryByTestId('export-dropdown')).toBeNull();
+  });
+});
diff --git a/frontend/tests/ExportEngagementButton.test.tsx b/frontend/tests/ExportEngagementButton.test.tsx
new file mode 100644
index 0000000..a139ff3
--- /dev/null
+++ b/frontend/tests/ExportEngagementButton.test.tsx
@@ -0,0 +1,133 @@
+import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest';
+import { screen, waitFor } from '@testing-library/react';
+import userEvent from '@testing-library/user-event';
+import { ExportEngagementButton } from '@/components/ExportEngagementButton';
+import { ToastViewport } from '@/components/Toast';
+import { renderWithProviders } from './utils';
+
+function ExportButtonWithToast({ engagementId }: { engagementId: number }) {
+  return (
+    <>
+      <ExportEngagementButton engagementId={engagementId} />
+      <ToastViewport />
+    </>
+  );
+}
+
+vi.mock('@/api/exports', () => ({
+  downloadEngagementExport: vi.fn(),
+}));
+
+import { downloadEngagementExport } from '@/api/exports';
+const mockDownload = downloadEngagementExport as ReturnType<typeof vi.fn>;
+
+vi.mock('@/hooks/useAuth', () => ({
+  useAuth: () => ({
+    user: { id: 1, username: 'alice', role: 'admin', created_at: '2026-01-01' },
+    status: 'authenticated',
+    login: vi.fn(),
+    logout: vi.fn(),
+    isAdmin: true,
+    isRedteam: false,
+    isSoc: false,
+    canEditEngagements: true,
+  }),
+}));
+
+describe('ExportEngagementButton', () => {
+  beforeEach(() => {
+    vi.clearAllMocks();
+  });
+
+  afterEach(() => {
+    vi.clearAllMocks();
+  });
+
+  it('renders Export button with chevron', () => {
+    renderWithProviders(<ExportEngagementButton engagementId={1} />);
+    expect(screen.getByTestId('export-btn')).toBeInTheDocument();
+    expect(screen.getByTestId('export-dropdown-toggle')).toBeInTheDocument();
+    expect(screen.getByText('Export')).toBeInTheDocument();
+  });
+
+  it('clicking primary opens dropdown with three formats', async () => {
+    const user = userEvent.setup();
+    renderWithProviders(<ExportEngagementButton engagementId={1} />);
+    await user.click(screen.getByTestId('export-btn'));
+    expect(screen.getByText('Markdown')).toBeInTheDocument();
+    expect(screen.getByText('CSV')).toBeInTheDocument();
+    expect(screen.getByText('PDF')).toBeInTheDocument();
+  });
+
+  it('clicking outside closes dropdown', async () => {
+    const user = userEvent.setup();
+    renderWithProviders(<ExportEngagementButton engagementId={1} />);
+    await user.click(screen.getByTestId('export-btn'));
+    expect(screen.getByText('Markdown')).toBeInTheDocument();
+    await user.click(document.body);
+    expect(screen.queryByText('Markdown')).toBeNull();
+  });
+
+  it('Escape closes dropdown', async () => {
+    const user = userEvent.setup();
+    renderWithProviders(<ExportEngagementButton engagementId={1} />);
+    await user.click(screen.getByTestId('export-dropdown-toggle'));
+    expect(screen.getByText('Markdown')).toBeInTheDocument();
+    await user.keyboard('{Escape}');
+    expect(screen.queryByText('Markdown')).toBeNull();
+  });
+
+  it('clicking Markdown triggers download with format=md', async () => {
+    mockDownload.mockResolvedValue(undefined);
+    const user = userEvent.setup();
+    renderWithProviders(<ExportEngagementButton engagementId={42} />);
+    await user.click(screen.getByTestId('export-btn'));
+    await user.click(screen.getByTestId('export-format-md'));
+    expect(mockDownload).toHaveBeenCalledWith(42, 'md');
+  });
+
+  it('clicking CSV triggers download with format=csv', async () => {
+    mockDownload.mockResolvedValue(undefined);
+    const user = userEvent.setup();
+    renderWithProviders(<ExportEngagementButton engagementId={42} />);
+    await user.click(screen.getByTestId('export-btn'));
+    await user.click(screen.getByTestId('export-format-csv'));
+    expect(mockDownload).toHaveBeenCalledWith(42, 'csv');
+  });
+
+  it('clicking PDF triggers download with format=pdf', async () => {
+    mockDownload.mockResolvedValue(undefined);
+    const user = userEvent.setup();
+    renderWithProviders(<ExportEngagementButton engagementId={42} />);
+    await user.click(screen.getByTestId('export-btn'));
+    await user.click(screen.getByTestId('export-format-pdf'));
+    expect(mockDownload).toHaveBeenCalledWith(42, 'pdf');
+  });
+
+  it('loading state disables items during in-flight', async () => {
+    let resolve!: () => void;
+    mockDownload.mockReturnValue(new Promise<void>((r) => { resolve = r; }));
+    const user = userEvent.setup();
+    renderWithProviders(<ExportEngagementButton engagementId={1} />);
+    await user.click(screen.getByTestId('export-btn'));
+    await user.click(screen.getByTestId('export-format-md'));
+    // Items should be disabled while in-flight
+    await waitFor(() => {
+      expect(screen.getByTestId('export-format-csv')).toBeDisabled();
+      expect(screen.getByTestId('export-format-pdf')).toBeDisabled();
+    });
+    resolve();
+  });
+
+  it('error response shows toast', async () => {
+    mockDownload.mockRejectedValue(new Error('Export failed: 403 Forbidden'));
+    const user = userEvent.setup();
+    renderWithProviders(<ExportButtonWithToast engagementId={1} />);
+    await user.click(screen.getByTestId('export-btn'));
+    await user.click(screen.getByTestId('export-format-md'));
+    await waitFor(() => {
+      expect(screen.getByTestId('toast')).toBeInTheDocument();
+      expect(screen.getByTestId('toast')).toHaveTextContent('Export failed: 403 Forbidden');
+    });
+  });
+});