diff --git a/apps/admin/src/App.tsx b/apps/admin/src/App.tsx
index 34fceda..6156417 100644
--- a/apps/admin/src/App.tsx
+++ b/apps/admin/src/App.tsx
@@ -4,6 +4,7 @@ import Login from './screens/Login';
 import Sidebar from './components/Sidebar';
 import Live from './screens/Live';
 import Activities from './screens/Activities';
+import Sessions from './screens/Sessions';
 
 function AuthedShell() {
   return (
@@ -14,6 +15,7 @@ function AuthedShell() {
           <Routes>
             <Route path="/" element={<Live />} />
             <Route path="/handelingen" element={<Activities />} />
+            <Route path="/sessies" element={<Sessions />} />
           </Routes>
         </main>
       </div>
diff --git a/apps/admin/src/api/admin-sessions.ts b/apps/admin/src/api/admin-sessions.ts
index 2dfb022..81adf96 100644
--- a/apps/admin/src/api/admin-sessions.ts
+++ b/apps/admin/src/api/admin-sessions.ts
@@ -1,5 +1,9 @@
-import { useQuery } from '@tanstack/react-query';
-import type { WorkSession } from '@solelog/shared';
+import { useMutation, useQuery, useQueryClient } from '@tanstack/react-query';
+import type {
+  AdminUpdateSessionInput,
+  CreateManualSessionInput,
+  WorkSession,
+} from '@solelog/shared';
 import { apiFetch } from '../lib/api';
 
 // Active work sessions across all workers (admin cross-user view).
@@ -11,3 +15,69 @@ export function useActiveSessions() {
     refetchInterval: 5000,
   });
 }
+
+// Every session (newest first) for the Sessies management screen.
+export function useAllSessions() {
+  return useQuery({
+    queryKey: ['admin', 'sessions', 'all'],
+    queryFn: () => apiFetch<WorkSession[]>('/api/admin/sessions'),
+  });
+}
+
+// Roster for the create-form worker picker.
+export function useAdminUsers() {
+  return useQuery({
+    queryKey: ['admin', 'users'],
+    queryFn: () => apiFetch<{ id: string; name: string; email: string }[]>('/api/admin/users'),
+  });
+}
+
+export function useCreateManualSession() {
+  const queryClient = useQueryClient();
+  return useMutation({
+    mutationFn: (input: CreateManualSessionInput) =>
+      apiFetch<WorkSession>('/api/admin/sessions', {
+        method: 'POST',
+        body: JSON.stringify(input),
+      }),
+    onSuccess: () => {
+      queryClient.invalidateQueries({ queryKey: ['admin', 'sessions'] });
+    },
+  });
+}
+
+export function useUpdateSession() {
+  const queryClient = useQueryClient();
+  return useMutation({
+    mutationFn: ({ id, input }: { id: number; input: AdminUpdateSessionInput }) =>
+      apiFetch<WorkSession>(`/api/admin/sessions/${id}`, {
+        method: 'PUT',
+        body: JSON.stringify(input),
+      }),
+    onSuccess: () => {
+      queryClient.invalidateQueries({ queryKey: ['admin', 'sessions'] });
+    },
+  });
+}
+
+export function useAdminStopSession() {
+  const queryClient = useQueryClient();
+  return useMutation({
+    mutationFn: (id: number) =>
+      apiFetch<WorkSession>(`/api/admin/sessions/${id}/stop`, { method: 'POST' }),
+    onSuccess: () => {
+      queryClient.invalidateQueries({ queryKey: ['admin', 'sessions'] });
+    },
+  });
+}
+
+export function useAdminDiscardSession() {
+  const queryClient = useQueryClient();
+  return useMutation({
+    mutationFn: (id: number) =>
+      apiFetch<WorkSession>(`/api/admin/sessions/${id}/discard`, { method: 'POST' }),
+    onSuccess: () => {
+      queryClient.invalidateQueries({ queryKey: ['admin', 'sessions'] });
+    },
+  });
+}
diff --git a/apps/admin/src/components/Sidebar.tsx b/apps/admin/src/components/Sidebar.tsx
index 863c2e2..86b4a52 100644
--- a/apps/admin/src/components/Sidebar.tsx
+++ b/apps/admin/src/components/Sidebar.tsx
@@ -5,10 +5,11 @@ import { useMe } from '../api/me';
 const navItems = [
   { to: '/', label: 'Live' },
   { to: '/handelingen', label: 'Handelingen' },
+  { to: '/sessies', label: 'Sessies' },
 ] as const;
 
 // Sections planned for Phase 3b — shown muted/disabled as a hint of what's coming.
-const soonItems = ['Rapporten', 'Gebruikers', 'Handmatig'] as const;
+const soonItems = ['Rapporten', 'Gebruikers'] as const;
 
 export default function Sidebar() {
   const { signOut } = useAuth();
diff --git a/apps/admin/src/screens/Sessions.test.tsx b/apps/admin/src/screens/Sessions.test.tsx
new file mode 100644
index 0000000..6cb0c83
--- /dev/null
+++ b/apps/admin/src/screens/Sessions.test.tsx
@@ -0,0 +1,195 @@
+import { render, screen, waitFor, within } from '@testing-library/react';
+import userEvent from '@testing-library/user-event';
+import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest';
+import { QueryClient, QueryClientProvider } from '@tanstack/react-query';
+import type { WorkSession } from '@solelog/shared';
+import Sessions from './Sessions';
+import { apiFetch } from '../lib/api';
+
+vi.mock('../lib/api', () => ({
+  apiFetch: vi.fn(),
+}));
+
+const mockApiFetch = vi.mocked(apiFetch);
+
+function makeSession(over: Partial<WorkSession>): WorkSession {
+  return {
+    id: 1,
+    user_id: 'u1',
+    activity_id: 10,
+    activity_name: 'Frezen',
+    user_name: 'Jan',
+    insole_type: 'Kurk',
+    pair_count: 4,
+    start_time: new Date('2026-06-17T08:00:00Z').toISOString(),
+    end_time: new Date('2026-06-17T09:00:00Z').toISOString(),
+    duration_seconds: 3000,
+    paused_seconds: 600,
+    paused_at: null,
+    status: 'completed',
+    source: 'manual',
+    notes: null,
+    created_at: new Date('2026-06-17T09:00:00Z').toISOString(),
+    ...over,
+  };
+}
+
+const SESSIONS: WorkSession[] = [
+  makeSession({
+    id: 1,
+    user_name: 'Jan',
+    activity_name: 'Frezen',
+    status: 'completed',
+    duration_seconds: 3000,
+    paused_seconds: 600,
+    end_time: new Date('2026-06-17T09:00:00Z').toISOString(),
+  }),
+  makeSession({
+    id: 2,
+    user_name: 'Piet',
+    activity_name: 'Lijmen',
+    status: 'active',
+    duration_seconds: null,
+    paused_seconds: 0,
+    end_time: null,
+    start_time: new Date(Date.now() - 120_000).toISOString(),
+  }),
+  makeSession({
+    id: 3,
+    user_name: 'Klaas',
+    activity_name: 'Snijden',
+    status: 'discarded',
+    duration_seconds: null,
+    paused_seconds: 0,
+    end_time: new Date('2026-06-17T07:00:00Z').toISOString(),
+  }),
+];
+
+// Route any non-sessions call (users roster, activities) to an empty list.
+function mockEndpoints(sessions: WorkSession[]) {
+  mockApiFetch.mockImplementation((path: string) => {
+    if (path === '/api/admin/sessions') return Promise.resolve(sessions as never);
+    return Promise.resolve([] as never);
+  });
+}
+
+function renderSessions() {
+  const queryClient = new QueryClient({ defaultOptions: { queries: { retry: false } } });
+  return render(
+    <QueryClientProvider client={queryClient}>
+      <Sessions />
+    </QueryClientProvider>,
+  );
+}
+
+describe('Sessions', () => {
+  beforeEach(() => {
+    mockApiFetch.mockReset();
+  });
+
+  afterEach(() => {
+    vi.clearAllMocks();
+  });
+
+  it('renders a row per session with worker, activity and worked time', async () => {
+    mockEndpoints(SESSIONS);
+    renderSessions();
+
+    expect(await screen.findByText('Sessies')).toBeInTheDocument();
+    expect(await screen.findByText('Jan')).toBeInTheDocument();
+    expect(screen.getByText('Frezen')).toBeInTheDocument();
+    expect(screen.getByText('Piet')).toBeInTheDocument();
+    expect(screen.getByText('Klaas')).toBeInTheDocument();
+    // worked for the completed manual session = 3000s = 00:50:00
+    expect(screen.getByText('00:50:00')).toBeInTheDocument();
+    // pause shown when paused_seconds > 0 (600s = 00:10:00)
+    expect(screen.getByText(/Pauze 00:10:00/)).toBeInTheDocument();
+  });
+
+  it('narrows the list when the status filter changes', async () => {
+    mockEndpoints(SESSIONS);
+    renderSessions();
+
+    expect(await screen.findByText('Jan')).toBeInTheDocument();
+
+    await userEvent.selectOptions(screen.getByLabelText('Status'), 'active');
+
+    expect(screen.getByText('Piet')).toBeInTheDocument();
+    expect(screen.queryByText('Jan')).not.toBeInTheDocument();
+    expect(screen.queryByText('Klaas')).not.toBeInTheDocument();
+  });
+
+  it('shows Stop/Annuleer only on active rows and ✎ on all rows', async () => {
+    mockEndpoints(SESSIONS);
+    renderSessions();
+
+    expect(await screen.findByText('Jan')).toBeInTheDocument();
+
+    // ✎ edit on every row.
+    expect(screen.getAllByRole('button', { name: /Bewerk/ })).toHaveLength(3);
+    // Stop/Annuleer only on the single active row.
+    expect(screen.getAllByRole('button', { name: 'Stop' })).toHaveLength(1);
+    expect(screen.getAllByRole('button', { name: 'Annuleer' })).toHaveLength(1);
+  });
+
+  it('Stop on an active row calls the stop endpoint', async () => {
+    mockEndpoints(SESSIONS);
+    renderSessions();
+
+    expect(await screen.findByText('Piet')).toBeInTheDocument();
+    await userEvent.click(screen.getByRole('button', { name: 'Stop' }));
+
+    await waitFor(() =>
+      expect(mockApiFetch).toHaveBeenCalledWith(
+        '/api/admin/sessions/2/stop',
+        expect.objectContaining({ method: 'POST' }),
+      ),
+    );
+  });
+
+  it('Annuleer on an active row calls the discard endpoint', async () => {
+    mockEndpoints(SESSIONS);
+    renderSessions();
+
+    expect(await screen.findByText('Piet')).toBeInTheDocument();
+    await userEvent.click(screen.getByRole('button', { name: 'Annuleer' }));
+
+    await waitFor(() =>
+      expect(mockApiFetch).toHaveBeenCalledWith(
+        '/api/admin/sessions/2/discard',
+        expect.objectContaining({ method: 'POST' }),
+      ),
+    );
+  });
+
+  it('+ Nieuwe registratie opens the create form (worker picker visible)', async () => {
+    mockEndpoints(SESSIONS);
+    renderSessions();
+
+    expect(await screen.findByText('Jan')).toBeInTheDocument();
+    await userEvent.click(screen.getByRole('button', { name: '+ Nieuwe registratie' }));
+
+    // Task 4 fills the form; for now we assert the create panel/region opens.
+    expect(await screen.findByTestId('session-form')).toBeInTheDocument();
+  });
+
+  it('shows the empty state when there are no sessions', async () => {
+    mockEndpoints([]);
+    renderSessions();
+
+    expect(await screen.findByText('Nog geen sessies.')).toBeInTheDocument();
+  });
+
+  it('keeps the discarded row hidden when filtering to voltooid', async () => {
+    mockEndpoints(SESSIONS);
+    renderSessions();
+
+    expect(await screen.findByText('Jan')).toBeInTheDocument();
+    await userEvent.selectOptions(screen.getByLabelText('Status'), 'completed');
+
+    const list = screen.getByRole('list', { name: 'Sessies' });
+    expect(within(list).getByText('Jan')).toBeInTheDocument();
+    expect(within(list).queryByText('Piet')).not.toBeInTheDocument();
+    expect(within(list).queryByText('Klaas')).not.toBeInTheDocument();
+  });
+});
diff --git a/apps/admin/src/screens/Sessions.tsx b/apps/admin/src/screens/Sessions.tsx
new file mode 100644
index 0000000..d249893
--- /dev/null
+++ b/apps/admin/src/screens/Sessions.tsx
@@ -0,0 +1,177 @@
+import { useState } from 'react';
+import type { SessionStatus, WorkSession } from '@solelog/shared';
+import { useAdminDiscardSession, useAdminStopSession, useAllSessions } from '../api/admin-sessions';
+import { formatTime } from '../lib/elapsed';
+
+type StatusFilter = 'all' | SessionStatus;
+
+const STATUS_OPTIONS: { value: StatusFilter; label: string }[] = [
+  { value: 'all', label: 'Alle' },
+  { value: 'active', label: 'Actief' },
+  { value: 'completed', label: 'Voltooid' },
+  { value: 'discarded', label: 'Geannuleerd' },
+];
+
+const STATUS_LABEL: Record<SessionStatus, string> = {
+  active: 'Actief',
+  completed: 'Voltooid',
+  discarded: 'Geannuleerd',
+};
+
+// Worked seconds for a row: completed/discarded use the server-derived duration;
+// an active session counts from start − paused (frozen at the pause moment when paused).
+function workedSeconds(session: WorkSession): number {
+  if (session.status === 'active') {
+    const base = session.paused_at ? Date.parse(session.paused_at) : Date.now();
+    return Math.max(
+      0,
+      Math.floor((base - Date.parse(session.start_time)) / 1000) - session.paused_seconds,
+    );
+  }
+  return session.duration_seconds ?? 0;
+}
+
+function formatDate(iso: string): string {
+  const d = new Date(iso);
+  if (Number.isNaN(d.getTime())) return '';
+  return d.toLocaleDateString('nl-NL', { day: '2-digit', month: '2-digit', year: 'numeric' });
+}
+
+export default function Sessions() {
+  const { data, isLoading, isError } = useAllSessions();
+  const stopSession = useAdminStopSession();
+  const discardSession = useAdminDiscardSession();
+
+  const [filter, setFilter] = useState<StatusFilter>('all');
+  // Task 4 replaces this stub with the real create/edit form.
+  const [formOpen, setFormOpen] = useState(false);
+
+  if (isError) {
+    return (
+      <div className="screen">
+        <h1 className="screen-title">Sessies</h1>
+        <p className="muted">Kon sessies niet laden.</p>
+      </div>
+    );
+  }
+
+  const sessions = Array.isArray(data) ? data : [];
+  const visible = filter === 'all' ? sessions : sessions.filter((s) => s.status === filter);
+
+  return (
+    <div className="screen">
+      <div className="sessions-head">
+        <h1 className="screen-title">Sessies</h1>
+        <button type="button" className="btn-primary" onClick={() => setFormOpen(true)}>
+          + Nieuwe registratie
+        </button>
+      </div>
+
+      <div className="sessions-toolbar">
+        <label className="sessions-filter">
+          Status
+          <select
+            value={filter}
+            onChange={(e) => setFilter(e.target.value as StatusFilter)}
+            aria-label="Status"
+          >
+            {STATUS_OPTIONS.map((opt) => (
+              <option key={opt.value} value={opt.value}>
+                {opt.label}
+              </option>
+            ))}
+          </select>
+        </label>
+      </div>
+
+      {formOpen && (
+        <section className="card" data-testid="session-form">
+          <h2 className="section-label">Nieuwe registratie</h2>
+          {/* Task 4 fills in the full create/edit form. */}
+          <label className="sessions-filter">
+            Medewerker
+            <select aria-label="Medewerker" disabled>
+              <option>—</option>
+            </select>
+          </label>
+          <button type="button" className="btn-cancel" onClick={() => setFormOpen(false)}>
+            Annuleren
+          </button>
+        </section>
+      )}
+
+      {isLoading ? (
+        <p className="muted">Laden…</p>
+      ) : visible.length === 0 ? (
+        <p className="muted">
+          {sessions.length === 0 ? 'Nog geen sessies.' : 'Geen sessies in dit filter.'}
+        </p>
+      ) : (
+        <ul className="sessions-list" aria-label="Sessies">
+          {visible.map((session) => (
+            <SessionRow
+              key={session.id}
+              session={session}
+              onStop={() => stopSession.mutate(session.id)}
+              onDiscard={() => discardSession.mutate(session.id)}
+            />
+          ))}
+        </ul>
+      )}
+    </div>
+  );
+}
+
+function SessionRow({
+  session,
+  onStop,
+  onDiscard,
+}: {
+  session: WorkSession;
+  onStop: () => void;
+  onDiscard: () => void;
+}) {
+  const worked = workedSeconds(session);
+  const isActive = session.status === 'active';
+
+  return (
+    <li className="sessions-row">
+      <div className="sessions-cell sessions-worker">{session.user_name ?? 'Onbekend'}</div>
+      <div className="sessions-cell sessions-activity">
+        {session.activity_name ?? 'Onbekende handeling'}
+        {session.insole_type && <span className="sessions-type">{session.insole_type}</span>}
+      </div>
+      <div className="sessions-cell sessions-worked">
+        <span className="sessions-time">{formatTime(worked)}</span>
+        {session.paused_seconds > 0 && (
+          <span className="sessions-pause">Pauze {formatTime(session.paused_seconds)}</span>
+        )}
+      </div>
+      <div className="sessions-cell sessions-date">{formatDate(session.start_time)}</div>
+      <div className="sessions-cell sessions-status">
+        <span className={`sessions-badge sessions-badge-${session.status}`}>
+          {STATUS_LABEL[session.status]}
+        </span>
+      </div>
+      <div className="sessions-cell sessions-actions">
+        <button
+          type="button"
+          className="icon-btn icon-edit"
+          aria-label={`Bewerk sessie van ${session.user_name ?? 'onbekend'}`}
+        >
+          ✎
+        </button>
+        {isActive && (
+          <>
+            <button type="button" className="btn-row-stop" onClick={onStop}>
+              Stop
+            </button>
+            <button type="button" className="btn-row-cancel" onClick={onDiscard}>
+              Annuleer
+            </button>
+          </>
+        )}
+      </div>
+    </li>
+  );
+}
diff --git a/apps/admin/src/styles.css b/apps/admin/src/styles.css
index 8b6e3da..d461bc9 100644
--- a/apps/admin/src/styles.css
+++ b/apps/admin/src/styles.css
@@ -420,3 +420,160 @@ body {
   color: var(--text-muted);
   font-variant-numeric: tabular-nums;
 }
+
+/* ---- Sessions management (Sessies) ---- */
+.sessions-head {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  gap: 16px;
+  margin-bottom: 16px;
+}
+
+.sessions-head .screen-title {
+  margin: 0;
+}
+
+.sessions-head .btn-primary {
+  width: auto;
+  white-space: nowrap;
+}
+
+.sessions-toolbar {
+  display: flex;
+  align-items: center;
+  gap: 16px;
+  margin-bottom: 20px;
+}
+
+.sessions-filter {
+  display: flex;
+  align-items: center;
+  gap: 8px;
+  font-size: 14px;
+  font-weight: 600;
+  color: var(--text-muted);
+}
+
+.sessions-filter select {
+  padding: 8px 12px;
+  font-size: 15px;
+  border: 1px solid var(--border);
+  border-radius: 12px;
+  background: #ffffff;
+  color: var(--text);
+}
+
+.sessions-list {
+  list-style: none;
+  margin: 0;
+  padding: 0;
+  display: flex;
+  flex-direction: column;
+  gap: 8px;
+}
+
+.sessions-row {
+  display: grid;
+  grid-template-columns: 1.2fr 1.6fr 1fr 0.8fr 0.8fr auto;
+  align-items: center;
+  gap: 12px;
+  padding: 14px 16px;
+  background: #ffffff;
+  border: 1px solid var(--border);
+  border-radius: 12px;
+}
+
+.sessions-worker {
+  font-weight: 600;
+  color: var(--text);
+}
+
+.sessions-activity {
+  display: flex;
+  align-items: center;
+  gap: 8px;
+  color: var(--text);
+}
+
+.sessions-type {
+  font-size: 12px;
+  font-weight: 600;
+  color: var(--primary);
+  background: var(--primary-light);
+  border-radius: 999px;
+  padding: 2px 10px;
+}
+
+.sessions-worked {
+  display: flex;
+  flex-direction: column;
+  gap: 2px;
+}
+
+.sessions-time {
+  font-variant-numeric: tabular-nums;
+  font-weight: 600;
+}
+
+.sessions-pause {
+  font-size: 12px;
+  color: var(--text-muted);
+  font-variant-numeric: tabular-nums;
+}
+
+.sessions-date {
+  font-size: 14px;
+  color: var(--text-muted);
+}
+
+.sessions-badge {
+  font-size: 12px;
+  font-weight: 600;
+  border-radius: 999px;
+  padding: 4px 10px;
+}
+
+.sessions-badge-active {
+  color: #166534;
+  background: #dcfce7;
+}
+
+.sessions-badge-completed {
+  color: var(--text-muted);
+  background: #f3f4f6;
+}
+
+.sessions-badge-discarded {
+  color: var(--danger);
+  background: #fee2e2;
+}
+
+.sessions-actions {
+  display: flex;
+  align-items: center;
+  gap: 8px;
+  justify-content: flex-end;
+}
+
+.btn-row-stop {
+  padding: 8px 14px;
+  font-size: 14px;
+  font-weight: 600;
+  color: #166534;
+  background: #dcfce7;
+  border: 1px solid #86efac;
+  border-radius: 12px;
+  cursor: pointer;
+}
+
+.btn-row-cancel {
+  padding: 8px 14px;
+  font-size: 14px;
+  font-weight: 600;
+  color: var(--danger);
+  background: #fee2e2;
+  border: 1px solid #fecaca;
+  border-radius: 12px;
+  cursor: pointer;
+}