diff --git a/.env.example b/.env.example
index 142c3a2..7a89d74 100644
--- a/.env.example
+++ b/.env.example
@@ -20,6 +20,13 @@ XRAY_REPORT_URL=https://xray.example.com/report/123
 SONAR_REPORT_URL=https://sonar.example.com/dashboard?id=project
 JIRA_DRY_RUN=false
 
+# Optional: Mehrfachangabe von Tickets, die geschlossen werden sollen (CSV)
+JIRA_CLOSE_ISSUE_KEYS=SRC-101,SRC-102
+# Optional: Nur Tickets mit diesen aktuellen Status werden geschlossen (CSV)
+JIRA_CLOSE_ALLOWED_STATUSES=Done,Resolved
+# Optional: Name der Jira Transition in Richtung "geschlossen"
+JIRA_CLOSE_TRANSITION_NAME=Geschlossen
+
 # Atlassian Wiki / Confluence (optional)
 ATLASSIAN_WIKI_ENABLED=false
 # Optional, faellt auf JIRA_BASE_URL zurueck:
diff --git a/README.md b/README.md
index 297811b..e90acb8 100644
--- a/README.md
+++ b/README.md
@@ -51,6 +51,9 @@ Empfohlen:
 - `SONAR_REPORT_URL` (optional)
 - `JIRA_DRY_RUN` (`true`/`false`)
 - `OUTPUT_HTML_PATH` (Default: `report-output/report.html`)
+- `JIRA_CLOSE_ISSUE_KEYS` (CSV, optional; z. B. `ABC-1,ABC-2`)
+- `JIRA_CLOSE_ALLOWED_STATUSES` (CSV, optional; z. B. `Done,Resolved`)
+- `JIRA_CLOSE_TRANSITION_NAME` (optional; Default: `Geschlossen`)
 
 Atlassian Wiki / Confluence optional:
 
@@ -103,6 +106,9 @@ Lege in TeamCity die Variablen als Parameter vom Typ `env.*` an, z. B.:
 - `env.SOLUTION_VERSION`
 - `env.XRAY_REPORT_URL`
 - `env.SONAR_REPORT_URL`
+- `env.JIRA_CLOSE_ISSUE_KEYS`
+- `env.JIRA_CLOSE_ALLOWED_STATUSES`
+- `env.JIRA_CLOSE_TRANSITION_NAME`
 - `env.ATLASSIAN_WIKI_ENABLED`
 - `env.ATLASSIAN_WIKI_SPACE_KEY`
 - `env.ATLASSIAN_WIKI_PARENT_PAGE_ID`
diff --git a/src/config.js b/src/config.js
index 6bd9329..1170d20 100644
--- a/src/config.js
+++ b/src/config.js
@@ -76,6 +76,13 @@ function getConfig() {
       xrayReportUrl: (process.env.XRAY_REPORT_URL || "").trim(),
       sonarReportUrl: (process.env.SONAR_REPORT_URL || "").trim(),
       dryRun: parseBoolean(process.env.JIRA_DRY_RUN, false),
+      issueClose: {
+        issueKeys: parseList(process.env.JIRA_CLOSE_ISSUE_KEYS),
+        allowedStatuses: parseList(process.env.JIRA_CLOSE_ALLOWED_STATUSES),
+        transitionName:
+          (process.env.JIRA_CLOSE_TRANSITION_NAME || "Geschlossen").trim() ||
+          "Geschlossen",
+      },
     },
     smtp: {
       enabled: parseBoolean(process.env.SMTP_ENABLED, false),
@@ -140,6 +147,9 @@ Wichtige ENV Variablen:
   SOLUTION_VERSION
   XRAY_REPORT_URL
   SONAR_REPORT_URL
+  JIRA_CLOSE_ISSUE_KEYS
+  JIRA_CLOSE_ALLOWED_STATUSES
+  JIRA_CLOSE_TRANSITION_NAME
   ATLASSIAN_WIKI_ENABLED=true|false
   ATLASSIAN_WIKI_SPACE_KEY
   SMTP_ENABLED=true|false
diff --git a/src/index.js b/src/index.js
index 9676d54..848a79c 100644
--- a/src/index.js
+++ b/src/index.js
@@ -39,7 +39,7 @@ async function run() {
     }`
   );
   logStep(
-    `Optionen: Wiki=${config.wiki.enabled}, SMTP=${config.smtp.enabled}, Output=${config.outputHtmlPath}`
+    `Optionen: Wiki=${config.wiki.enabled}, SMTP=${config.smtp.enabled}, Output=${config.outputHtmlPath}, CloseKeys=${config.jira.issueClose.issueKeys.length}`
   );
 
   const jira = createJiraClient(config.jira);
@@ -129,6 +129,54 @@ async function run() {
     logStep("Wiki-Seite deaktiviert (ATLASSIAN_WIKI_ENABLED=false).");
   }
 
+  let issueCloseResult = null;
+  if (config.jira.issueClose.issueKeys.length > 0 && !dryRun) {
+    logStep(
+      `Starte Ticket-Schliessung fuer ${config.jira.issueClose.issueKeys.length} Tickets (Transition: ${config.jira.issueClose.transitionName})...`
+    );
+    if (config.jira.issueClose.allowedStatuses.length > 0) {
+      logStep(
+        `Ticket-Schliessung nur aus Status: ${config.jira.issueClose.allowedStatuses.join(
+          ", "
+        )}`
+      );
+    }
+
+    issueCloseResult = await jira.closeIssues({
+      issueKeys: config.jira.issueClose.issueKeys,
+      allowedStatuses: config.jira.issueClose.allowedStatuses,
+      transitionName: config.jira.issueClose.transitionName,
+    });
+
+    logStep(
+      `Ticket-Schliessung abgeschlossen: geschlossen=${issueCloseResult.closed.length}, uebersprungenStatus=${issueCloseResult.skippedByStatus.length}, uebersprungenTransition=${issueCloseResult.skippedByMissingTransition.length}, fehler=${issueCloseResult.errors.length}`
+    );
+
+    for (const item of issueCloseResult.closed) {
+      logStep(
+        `Ticket geschlossen: ${item.issueKey} (${item.fromStatus} -> ${item.transition})`
+      );
+    }
+    for (const item of issueCloseResult.skippedByStatus) {
+      logStep(
+        `Ticket uebersprungen (Status nicht erlaubt): ${item.issueKey} (aktuell: ${item.currentStatus || "-"})`
+      );
+    }
+    for (const item of issueCloseResult.skippedByMissingTransition) {
+      logStep(
+        `Ticket uebersprungen (Transition nicht gefunden): ${item.issueKey} (gewuenscht: ${item.requestedTransition})`
+      );
+    }
+    for (const item of issueCloseResult.errors) {
+      logStep(`Ticket Fehler: ${item.issueKey}`);
+      console.error(item.message);
+    }
+  } else if (config.jira.issueClose.issueKeys.length > 0) {
+    logStep("Ticket-Schliessung uebersprungen (Dry-Run).");
+  } else {
+    logStep("Ticket-Schliessung nicht konfiguriert.");
+  }
+
   logStep("Erzeuge HTML-Zusammenfassung...");
   const html = buildHtmlSummary(report, createdIssueUrl);
   const outputDir = path.dirname(config.outputHtmlPath);
@@ -151,12 +199,24 @@ async function run() {
     createdIssueUrl || "nicht erstellt (Dry-Run)"
   }\nWiki Seite: ${wikiStatusText}`;
 
+  let issueCloseText = "\nTicket-Schliessung: nicht konfiguriert.";
+  if (config.jira.issueClose.issueKeys.length > 0) {
+    if (dryRun) {
+      issueCloseText =
+        "\nTicket-Schliessung: nicht ausgefuehrt (Dry-Run).";
+    } else if (issueCloseResult) {
+      issueCloseText = `\nTicket-Schliessung: geschlossen=${issueCloseResult.closed.length}, uebersprungenStatus=${issueCloseResult.skippedByStatus.length}, uebersprungenTransition=${issueCloseResult.skippedByMissingTransition.length}, fehler=${issueCloseResult.errors.length}`;
+    }
+  }
+
+  const mailTextWithIssueClose = `${mailText}${issueCloseText}`;
+
   logStep("Starte E-Mail-Versand...");
   const mailResult = await sendReportMail({
     smtpConfig: config.smtp,
     subject: mailSubject,
     html,
-    text: mailText,
+    text: mailTextWithIssueClose,
   });
   logStep("E-Mail-Versand abgeschlossen.");
 
@@ -187,6 +247,12 @@ async function run() {
   } else {
     console.log(`E-Mail Versand: erfolgreich (Message-ID ${mailResult.messageId})`);
   }
+
+  if (issueCloseResult) {
+    console.log(
+      `Ticket-Schliessung: geschlossen=${issueCloseResult.closed.length}, uebersprungenStatus=${issueCloseResult.skippedByStatus.length}, uebersprungenTransition=${issueCloseResult.skippedByMissingTransition.length}, fehler=${issueCloseResult.errors.length}`
+    );
+  }
 }
 
 run().catch((error) => {
diff --git a/src/jira.js b/src/jira.js
index 7be8609..63b03a0 100644
--- a/src/jira.js
+++ b/src/jira.js
@@ -77,10 +77,98 @@ function createJiraClient(config) {
     return response.data;
   }
 
+  async function getIssueStatus(issueKey) {
+    const encodedIssueKey = encodeURIComponent(issueKey);
+    const response = await api.get(`/issue/${encodedIssueKey}`, {
+      params: { fields: "status" },
+    });
+    return response.data?.fields?.status?.name || "";
+  }
+
+  async function getTransitions(issueKey) {
+    const encodedIssueKey = encodeURIComponent(issueKey);
+    const response = await api.get(`/issue/${encodedIssueKey}/transitions`);
+    return response.data?.transitions || [];
+  }
+
+  async function transitionIssueById(issueKey, transitionId) {
+    const encodedIssueKey = encodeURIComponent(issueKey);
+    await api.post(`/issue/${encodedIssueKey}/transitions`, {
+      transition: { id: String(transitionId) },
+    });
+  }
+
+  async function closeIssues({
+    issueKeys,
+    allowedStatuses = [],
+    transitionName = "Geschlossen",
+  }) {
+    const uniqueKeys = Array.from(
+      new Set((issueKeys || []).map((key) => String(key).trim()).filter(Boolean))
+    );
+
+    const allowedSet = new Set(
+      (allowedStatuses || []).map((status) => status.toLowerCase())
+    );
+
+    const transitionNameNormalized = transitionName.trim().toLowerCase();
+    const result = {
+      closed: [],
+      skippedByStatus: [],
+      skippedByMissingTransition: [],
+      errors: [],
+    };
+
+    for (const issueKey of uniqueKeys) {
+      try {
+        const currentStatus = await getIssueStatus(issueKey);
+
+        if (
+          allowedSet.size > 0 &&
+          !allowedSet.has(String(currentStatus).toLowerCase())
+        ) {
+          result.skippedByStatus.push({ issueKey, currentStatus });
+          continue;
+        }
+
+        const transitions = await getTransitions(issueKey);
+        const closeTransition = transitions.find(
+          (transition) =>
+            String(transition.name || "").trim().toLowerCase() ===
+            transitionNameNormalized
+        );
+
+        if (!closeTransition) {
+          result.skippedByMissingTransition.push({
+            issueKey,
+            currentStatus,
+            requestedTransition: transitionName,
+          });
+          continue;
+        }
+
+        await transitionIssueById(issueKey, closeTransition.id);
+        result.closed.push({
+          issueKey,
+          fromStatus: currentStatus,
+          transition: closeTransition.name,
+        });
+      } catch (error) {
+        result.errors.push({
+          issueKey,
+          message: error?.response?.data || error.message || String(error),
+        });
+      }
+    }
+
+    return result;
+  }
+
   return {
     getRecentIssues,
     resolveProjectKeyFromBoardId,
     createIssue,
+    closeIssues,
   };
 }
 
diff --git a/teamcity/run-workflow.ps1 b/teamcity/run-workflow.ps1
index 1b2a3db..39b266b 100644
--- a/teamcity/run-workflow.ps1
+++ b/teamcity/run-workflow.ps1
@@ -9,7 +9,7 @@ Write-Host "Builde Docker Image $imageName"
 docker build -t $imageName .
 
 Write-Host "Starte Workflow Container"
-Write-Host "Kontext: IMAGE_TAG=$imageTag, JIRA_DRY_RUN=$($env:JIRA_DRY_RUN), ATLASSIAN_WIKI_ENABLED=$($env:ATLASSIAN_WIKI_ENABLED), SMTP_ENABLED=$($env:SMTP_ENABLED)"
+Write-Host "Kontext: IMAGE_TAG=$imageTag, JIRA_DRY_RUN=$($env:JIRA_DRY_RUN), JIRA_CLOSE_ISSUE_KEYS=$($env:JIRA_CLOSE_ISSUE_KEYS), ATLASSIAN_WIKI_ENABLED=$($env:ATLASSIAN_WIKI_ENABLED), SMTP_ENABLED=$($env:SMTP_ENABLED)"
 Write-Host "Volume Mapping: $hostReportDir -> $containerReportDir"
 docker run --rm `
   -e JIRA_BASE_URL `
@@ -25,6 +25,9 @@ docker run --rm `
   -e SOLUTION_VERSION `
   -e XRAY_REPORT_URL `
   -e SONAR_REPORT_URL `
+  -e JIRA_CLOSE_ISSUE_KEYS `
+  -e JIRA_CLOSE_ALLOWED_STATUSES `
+  -e JIRA_CLOSE_TRANSITION_NAME `
   -e ATLASSIAN_WIKI_ENABLED `
   -e ATLASSIAN_WIKI_BASE_URL `
   -e ATLASSIAN_WIKI_USER_EMAIL `
diff --git a/teamcity/run-workflow.sh b/teamcity/run-workflow.sh
index da96637..bd6968e 100644
--- a/teamcity/run-workflow.sh
+++ b/teamcity/run-workflow.sh
@@ -10,7 +10,7 @@ echo "Builde Docker Image ${IMAGE_NAME}"
 docker build -t "${IMAGE_NAME}" .
 
 echo "Starte Workflow Container"
-echo "Kontext: IMAGE_TAG=${IMAGE_TAG}, JIRA_DRY_RUN=${JIRA_DRY_RUN:-false}, ATLASSIAN_WIKI_ENABLED=${ATLASSIAN_WIKI_ENABLED:-false}, SMTP_ENABLED=${SMTP_ENABLED:-false}"
+echo "Kontext: IMAGE_TAG=${IMAGE_TAG}, JIRA_DRY_RUN=${JIRA_DRY_RUN:-false}, JIRA_CLOSE_ISSUE_KEYS=${JIRA_CLOSE_ISSUE_KEYS:-}, ATLASSIAN_WIKI_ENABLED=${ATLASSIAN_WIKI_ENABLED:-false}, SMTP_ENABLED=${SMTP_ENABLED:-false}"
 echo "Volume Mapping: ${HOST_REPORT_DIR} -> ${CONTAINER_REPORT_DIR}"
 docker run --rm \
   -e JIRA_BASE_URL \
@@ -26,6 +26,9 @@ docker run --rm \
   -e SOLUTION_VERSION \
   -e XRAY_REPORT_URL \
   -e SONAR_REPORT_URL \
+  -e JIRA_CLOSE_ISSUE_KEYS \
+  -e JIRA_CLOSE_ALLOWED_STATUSES \
+  -e JIRA_CLOSE_TRANSITION_NAME \
   -e ATLASSIAN_WIKI_ENABLED \
   -e ATLASSIAN_WIKI_BASE_URL \
   -e ATLASSIAN_WIKI_USER_EMAIL \