diff --git a/services/domain/Big.Application/Ports.cs b/services/domain/Big.Application/Ports.cs
index 4a26dd5..8e74b72 100644
--- a/services/domain/Big.Application/Ports.cs
+++ b/services/domain/Big.Application/Ports.cs
@@ -86,3 +86,10 @@ public interface IRegistrationStore
 /// it) and the registration id it carries as a process variable.
 /// </summary>
 public sealed record OpenZaakJob(string JobId, RegistrationId RegistrationId);
+
+/// <summary>
+/// An acquired <c>BeoordelingEscaleren</c> escalation job (S-14): the Flowable job id and the process
+/// instance whose still-open <c>Beoordelen</c> task must be reassigned from behandelaar to teamlead
+/// once the 14-day boundary timer fires (ADR-0015).
+/// </summary>
+public sealed record EscalatieJob(string JobId, string ProcessInstanceId);
diff --git a/services/domain/Big.Infrastructure/FlowableWorkflowClient.cs b/services/domain/Big.Infrastructure/FlowableWorkflowClient.cs
index 6a723c8..5f886d4 100644
--- a/services/domain/Big.Infrastructure/FlowableWorkflowClient.cs
+++ b/services/domain/Big.Infrastructure/FlowableWorkflowClient.cs
@@ -106,6 +106,15 @@ public sealed class FlowableWorkflowClient(HttpClient http, FlowableOptions opti
         response.EnsureSuccessStatusCode();
     }
 
+    public Task<IReadOnlyList<EscalatieJob>> AcquireBeoordelingEscalatieJobsAsync(int maxJobs, CancellationToken ct = default)
+        => throw new NotImplementedException();
+
+    public Task ReassignBeoordelingToTeamleadAsync(string processInstanceId, CancellationToken ct = default)
+        => throw new NotImplementedException();
+
+    public Task CompleteBeoordelingEscalatieJobAsync(string jobId, CancellationToken ct = default)
+        => throw new NotImplementedException();
+
     private async Task<TResponse?> GetAsync<TResponse>(string path, CancellationToken ct)
     {
         var message = new HttpRequestMessage(HttpMethod.Get, new Uri(options.BaseUrl, path));
diff --git a/services/domain/Big.Tests/FlowableWorkflowClientTests.cs b/services/domain/Big.Tests/FlowableWorkflowClientTests.cs
index aff3bf3..d852e11 100644
--- a/services/domain/Big.Tests/FlowableWorkflowClientTests.cs
+++ b/services/domain/Big.Tests/FlowableWorkflowClientTests.cs
@@ -306,4 +306,108 @@ public class FlowableWorkflowClientTests
         await Assert.ThrowsAsync<HttpRequestException>(
             () => client.CompleteBeoordelingAsync("task-1", BeoordelingsBesluit.Goedkeuren));
     }
+
+    // ── S-14 (#15): 14-day beoordeling escalation → reassign to teamlead (ADR-0015) ───────────────
+    // The BPMN parks a parallel escalation token on a non-interrupting P14D boundary timer, surfaced as
+    // an external-worker job on the BeoordelingEscaleren topic. The worker reassigns the still-open
+    // Beoordelen task from the behandelaar group to teamlead, then completes the escalation job.
+
+    [Fact]
+    public async Task Acquire_escalation_jobs_posts_the_escalation_topic_and_parses_the_process_instance()
+    {
+        var capture = new RequestCapture();
+        var client = Client(capture.Responds(HttpStatusCode.OK,
+            """[{"id":"job-9","processInstanceId":"pi-1"}]"""));
+
+        var jobs = await client.AcquireBeoordelingEscalatieJobsAsync(3);
+
+        var job = Assert.Single(jobs);
+        Assert.Equal("job-9", job.JobId);
+        Assert.Equal("pi-1", job.ProcessInstanceId);
+        Assert.Equal("http://flowable/flowable-rest/external-job-api/acquire/jobs",
+            capture.Seen!.RequestUri!.ToString());
+        Assert.Contains("\"topic\":\"BeoordelingEscaleren\"", capture.Body);
+        Assert.Contains("\"numberOfTasks\":3", capture.Body);
+        Assert.Contains("\"workerId\":\"worker-x\"", capture.Body);
+    }
+
+    [Theory]
+    [InlineData("[]")]
+    [InlineData("null")]
+    public async Task Acquire_escalation_jobs_returns_empty_when_none_are_parked(string body)
+    {
+        var capture = new RequestCapture();
+        var client = Client(capture.Responds(HttpStatusCode.OK, body));
+
+        Assert.Empty(await client.AcquireBeoordelingEscalatieJobsAsync(1));
+        Assert.NotNull(capture.Seen);
+    }
+
+    [Fact]
+    public async Task Reassign_moves_the_open_beoordelen_task_from_behandelaar_to_teamlead()
+    {
+        var requests = new List<(HttpMethod Method, string Url, string? Body)>();
+        var client = Client(new StubHandler(async req =>
+        {
+            requests.Add((req.Method, req.RequestUri!.ToString(),
+                req.Content is null ? null : await req.Content.ReadAsStringAsync()));
+            // The task query returns the still-open Beoordelen task parked in this instance.
+            return req.RequestUri!.AbsoluteUri.EndsWith("service/query/tasks")
+                ? new HttpResponseMessage(HttpStatusCode.OK)
+                {
+                    Content = new StringContent("""{"data":[{"id":"task-7"}],"total":1}""",
+                        Encoding.UTF8, "application/json"),
+                }
+                : new HttpResponseMessage(HttpStatusCode.OK);
+        }));
+
+        await client.ReassignBeoordelingToTeamleadAsync("pi-1");
+
+        // 1. Find the still-open Beoordelen task in this process instance.
+        var query = requests.Single(r => r.Url.EndsWith("service/query/tasks"));
+        Assert.Equal(HttpMethod.Post, query.Method);
+        Assert.Contains("\"processInstanceId\":\"pi-1\"", query.Body);
+        Assert.Contains("\"taskDefinitionKey\":\"Beoordelen\"", query.Body);
+        // 2. Add teamlead as a candidate group on that task.
+        var add = requests.Single(r => r.Method == HttpMethod.Post
+            && r.Url.EndsWith("service/runtime/tasks/task-7/identitylinks"));
+        Assert.Contains("\"group\":\"teamlead\"", add.Body);
+        Assert.Contains("\"type\":\"candidate\"", add.Body);
+        // 3. Remove behandelaar as a candidate group — the task now belongs to teamlead.
+        Assert.Contains(requests, r => r.Method == HttpMethod.Delete
+            && r.Url.EndsWith("service/runtime/tasks/task-7/identitylinks/groups/behandelaar/candidate"));
+    }
+
+    [Fact]
+    public async Task Reassign_is_a_no_op_when_the_beoordelen_task_is_no_longer_open()
+    {
+        // The behandelaar completed it just before the timer fired: nothing to reassign, no throw.
+        var methods = new List<HttpMethod>();
+        var client = Client(new StubHandler(req =>
+        {
+            methods.Add(req.Method);
+            return Task.FromResult(new HttpResponseMessage(HttpStatusCode.OK)
+            {
+                Content = new StringContent("""{"data":[],"total":0}""", Encoding.UTF8, "application/json"),
+            });
+        }));
+
+        await client.ReassignBeoordelingToTeamleadAsync("pi-1");
+
+        Assert.DoesNotContain(HttpMethod.Delete, methods);
+    }
+
+    [Fact]
+    public async Task Complete_escalation_job_posts_to_the_job_complete_endpoint()
+    {
+        var capture = new RequestCapture();
+        var client = Client(capture.Responds(HttpStatusCode.NoContent));
+
+        await client.CompleteBeoordelingEscalatieJobAsync("job-9");
+
+        Assert.Equal(HttpMethod.Post, capture.Seen!.Method);
+        Assert.Equal("http://flowable/flowable-rest/external-job-api/acquire/jobs/job-9/complete",
+            capture.Seen.RequestUri!.ToString());
+        Assert.Contains("\"workerId\":\"worker-x\"", capture.Body);
+    }
 }