diff --git a/public/locales/de-DE/translation.json b/public/locales/de-DE/translation.json
index 5f7d6a9..cb77887 100644
--- a/public/locales/de-DE/translation.json
+++ b/public/locales/de-DE/translation.json
@@ -345,6 +345,9 @@
     "jobs": {
       "overriding-job-priority": "Überschriebene Job-Priorität",
       "suspend": "Anhalten",
+      "activate": "Aktivieren",
+      "include-jobs": "Bestehende Jobs einbeziehen",
+      "suspension-updated": "Status der Job-Definition aktualisiert.",
       "change-priority": "Job-Priorität ändern"
     },
     "sort": {
diff --git a/public/locales/en-US/translation.json b/public/locales/en-US/translation.json
index ac20fbe..d521846 100644
--- a/public/locales/en-US/translation.json
+++ b/public/locales/en-US/translation.json
@@ -345,6 +345,9 @@
     "jobs": {
       "overriding-job-priority": "Overriding Job Priority",
       "suspend": "Suspend",
+      "activate": "Activate",
+      "include-jobs": "Include existing jobs",
+      "suspension-updated": "Job definition state updated.",
       "change-priority": "Change Overriding Job Priority"
     },
     "sort": {
diff --git a/src/api/resources/job_definition.js b/src/api/resources/job_definition.js
index 52c2e87..7822943 100644
--- a/src/api/resources/job_definition.js
+++ b/src/api/resources/job_definition.js
@@ -1,12 +1,21 @@
-import { GET } from '../helper.jsx'
+import { GET, PUT } from '../helper.jsx'
 
 const get_job_definitions = (state, definition_id) =>
   GET(`/job-definition?processDefinitionId=${definition_id}`, state, state.api.job_definition.all.by_process_definition)
 
+const set_job_definition_suspended = (state, id, suspended, includeJobs = false) =>
+  PUT(
+    `/job-definition/${id}/suspended`,
+    { suspended, includeJobs },
+    state,
+    state.api.job_definition.update,
+  )
+
 const job_definition = {
   all: {
     by_process_definition: get_job_definitions
-  }
+  },
+  set_suspended: set_job_definition_suspended,
 }
 
-export default job_definition
\ No newline at end of file
+export default job_definition
diff --git a/src/api/resources/job_definition.test.js b/src/api/resources/job_definition.test.js
index dde29f3..32c1d3c 100644
--- a/src/api/resources/job_definition.test.js
+++ b/src/api/resources/job_definition.test.js
@@ -2,9 +2,10 @@ import { describe, it, vi, beforeEach } from "vitest";
 
 vi.mock("../helper.jsx", () => ({
   GET: vi.fn(),
+  PUT: vi.fn(),
 }));
 
-import { GET } from "../helper.jsx";
+import { GET, PUT } from "../helper.jsx";
 import { create_mock_state, expect_api_call } from "../../test/helpers.js";
 import job_definition from "./job_definition.js";
 
@@ -22,4 +23,14 @@ describe("api/resources/job_definition", () => {
       signal: state.api.job_definition.all.by_process_definition,
     });
   });
+
+  it("set_suspended() PUTs the suspended state for a job definition", () => {
+    job_definition.set_suspended(state, "job-def-1", true, true);
+    expect_api_call(PUT, {
+      url: "/job-definition/job-def-1/suspended",
+      body: { suspended: true, includeJobs: true },
+      state,
+      signal: state.api.job_definition.update,
+    });
+  });
 });
diff --git a/src/css/components.css b/src/css/components.css
index 5bed3e4..31de438 100644
--- a/src/css/components.css
+++ b/src/css/components.css
@@ -869,6 +869,25 @@ div.accordion {
   color: var(--text-2);
 }
 
+/* process job definitions */
+
+.job-definition-actions {
+  display: flex;
+  align-items: center;
+  gap: var(--spacing-1);
+  margin-bottom: var(--spacing-1);
+}
+
+.job-definition-actions label {
+  display: flex;
+  align-items: center;
+  gap: var(--spacing-half);
+}
+
+.job-definition-actions input[type="checkbox"] {
+  width: auto;
+}
+
 /* task detail cards */
 
 .task-cards {
diff --git a/src/pages/Processes.jsx b/src/pages/Processes.jsx
index d6ac79e..c71fe8e 100644
--- a/src/pages/Processes.jsx
+++ b/src/pages/Processes.jsx
@@ -686,7 +686,7 @@ const DefinitionsEmpty = () => {
       <a
         href="https://docs.operaton.org/manual/latest/installation/full/tomcat/manual/"
         target="_blank"
-        rel="noopener"
+        rel="noreferrer"
       >
         {t("processes.empty.how-to")}
       </a>
@@ -928,8 +928,7 @@ const InstanceDetails = () => {
       params: { selection_id, definition_id, panel },
       query,
     } = useRoute(),
-    history_mode = query.history === "true",
-    [t] = useTranslation();
+    history_mode = query.history === "true";
 
   if (selection_id) {
     if (
@@ -1043,20 +1042,16 @@ const InstanceVariables = () => {
             ? !history_mode
               ? Object.entries(
                   state.api.process.instance.variables.value.data,
-                ).map(
-                  // eslint-disable-next-line react/jsx-key
-                  ([name, { type, value }]) => (
-                    <tr>
-                      <td>{name}</td>
-                      <td>{type}</td>
-                      <td>{value}</td>
-                    </tr>
-                  ),
-                )
+                ).map(([name, { type, value }]) => (
+                  <tr key={name}>
+                    <td>{name}</td>
+                    <td>{type}</td>
+                    <td>{value}</td>
+                  </tr>
+                ))
               : state.api.process.instance.variables.value.data.map(
-                  // eslint-disable-next-line react/jsx-key
                   ({ name, type, value }) => (
-                    <tr>
+                    <tr key={name}>
                       <td>{name}</td>
                       <td>{type}</td>
                       <td>{value}</td>
@@ -1407,7 +1402,9 @@ const JobDefinitions = () => {
   const state = useContext(AppState),
     { definition_id, query } = useRoute(),
     history_mode = query?.history === "true",
-    [t] = useTranslation();
+    [t] = useTranslation(),
+    include_jobs = useSignal(false),
+    update = state.api.job_definition.update;
 
   useEffect(() => {
     void engine_rest.job_definition.all.by_process_definition(
@@ -1417,6 +1414,19 @@ const JobDefinitions = () => {
     // eslint-disable-next-line react-hooks/exhaustive-deps
   }, [definition_id]);
 
+  const set_suspended = async (id, suspended) => {
+    await engine_rest.job_definition.set_suspended(
+      state,
+      id,
+      suspended,
+      include_jobs.value,
+    );
+    void engine_rest.job_definition.all.by_process_definition(
+      state,
+      definition_id,
+    );
+  };
+
   /** @namespace state.api.job_definition.all.by_process_definition.value.data **/
   /** @namespace definition.jobType **/
   /** @namespace definition.jobConfiguration **/
@@ -1426,6 +1436,23 @@ const JobDefinitions = () => {
       {history_mode && (
         <small class="history-na">{t("processes.history-mode-na")}</small>
       )}
+      <div class="job-definition-actions">
+        <label>
+          <input
+            type="checkbox"
+            checked={include_jobs.value}
+            onChange={(e) => (include_jobs.value = e.currentTarget.checked)}
+          />
+          {t("processes.jobs.include-jobs")}
+        </label>
+      </div>
+      <RequestState
+        signal={update}
+        on_nothing={() => null}
+        on_success={() => (
+          <p class="info-box">{t("processes.jobs.suspension-updated")}</p>
+        )}
+      />
       <table>
         <thead>
           <tr>
@@ -1452,8 +1479,21 @@ const JobDefinitions = () => {
                 <td>{definition.jobConfiguration}</td>
                 <td>{definition.overridingJobPriority ?? "-"}</td>
                 <td>
-                  <button>{t("processes.jobs.suspend")}</button>
-                  <button>{t("processes.jobs.change-priority")}</button>
+                  {definition.suspended ? (
+                    <button
+                      type="button"
+                      onClick={() => set_suspended(definition.id, false)}
+                    >
+                      {t("processes.jobs.activate")}
+                    </button>
+                  ) : (
+                    <button
+                      type="button"
+                      onClick={() => set_suspended(definition.id, true)}
+                    >
+                      {t("processes.jobs.suspend")}
+                    </button>
+                  )}
                 </td>
               </tr>
             ),
@@ -1464,13 +1504,6 @@ const JobDefinitions = () => {
   );
 };
 
-const BackToListBtn = ({ url, title, className }) => (
-  <a className={`tabs-back ${className || ""}`} href={url} title={title}>
-    <Icons.arrow_left />
-    <Icons.list />
-  </a>
-);
-
 const DefinitionsManage = () => {
   const state = useContext(AppState),
     { route } = useLocation(),
diff --git a/src/pages/Processes.test.jsx b/src/pages/Processes.test.jsx
index 60c4b48..b38368e 100644
--- a/src/pages/Processes.test.jsx
+++ b/src/pages/Processes.test.jsx
@@ -356,6 +356,59 @@ describe("ProcessesPage — definition tabs", () => {
     expect(getByText("timer")).toBeTruthy();
     expect(getByText("R/PT5M")).toBeTruthy();
   });
+
+  it("jobs tab suspends an active job definition", async () => {
+    mockParams = { definition_id: "proc:1", panel: "jobs" };
+    signal_response(state.api.job_definition.all.by_process_definition, [
+      {
+        id: "jd1",
+        suspended: false,
+        jobType: "timer",
+        jobConfiguration: "R/PT5M",
+      },
+    ]);
+    engine_rest.job_definition.set_suspended.mockResolvedValue(undefined);
+    const { container, getByText } = renderPage(state);
+    fireEvent.click(
+      container.querySelector(
+        '.job-definition-actions input[type="checkbox"]',
+      ),
+    );
+    fireEvent.click(getByText("processes.jobs.suspend"));
+    await Promise.resolve();
+    await Promise.resolve();
+    expect(engine_rest.job_definition.set_suspended).toHaveBeenCalled();
+    expect(engine_rest.job_definition.set_suspended.mock.lastCall).toEqual([
+      state,
+      "jd1",
+      true,
+      true,
+    ]);
+  });
+
+  it("jobs tab activates a suspended job definition", async () => {
+    mockParams = { definition_id: "proc:1", panel: "jobs" };
+    signal_response(state.api.job_definition.all.by_process_definition, [
+      {
+        id: "jd1",
+        suspended: true,
+        jobType: "timer",
+        jobConfiguration: "R/PT5M",
+      },
+    ]);
+    engine_rest.job_definition.set_suspended.mockResolvedValue(undefined);
+    const { getByText } = renderPage(state);
+    fireEvent.click(getByText("processes.jobs.activate"));
+    await Promise.resolve();
+    await Promise.resolve();
+    expect(engine_rest.job_definition.set_suspended).toHaveBeenCalled();
+    expect(engine_rest.job_definition.set_suspended.mock.lastCall).toEqual([
+      state,
+      "jd1",
+      false,
+      false,
+    ]);
+  });
 });
 
 describe("ProcessesPage — instance details", () => {
diff --git a/src/state.js b/src/state.js
index f63ad2e..4a90f14 100644
--- a/src/state.js
+++ b/src/state.js
@@ -183,6 +183,7 @@ const createAppState = () => {
       all: {
         by_process_definition: signal(null),
       },
+      update: signal(null),
     },
   };
 
diff --git a/src/state.test.js b/src/state.test.js
index c6b9968..86a2ac1 100644
--- a/src/state.test.js
+++ b/src/state.test.js
@@ -57,6 +57,7 @@ describe("state", () => {
       expect(api.authorization.all.value).toBeNull();
       expect(api.batch.list.value).toBeNull();
       expect(api.batch.one.value).toBeNull();
+      expect(api.job_definition.update.value).toBeNull();
     });
   });
 });