diff --git a/.github/PULL_REQUEST_TEMPLATE.md b/.github/PULL_REQUEST_TEMPLATE.md
index bdf535eb9..f3d9d9514 100644
--- a/.github/PULL_REQUEST_TEMPLATE.md
+++ b/.github/PULL_REQUEST_TEMPLATE.md
@@ -2,6 +2,8 @@
 ## Summary
 <!-- 1-3 sentences: what this PR does and why. -->
 
+Signed-off-by: Your Name <your-email@example.com>
+
 ## Related Issue
 <!-- Link to the issue: Fixes #NNN or Closes #NNN. Remove this section if none. -->
 
diff --git a/.github/workflows/dco-check.yaml b/.github/workflows/dco-check.yaml
new file mode 100644
index 000000000..a9981ce91
--- /dev/null
+++ b/.github/workflows/dco-check.yaml
@@ -0,0 +1,34 @@
+# SPDX-FileCopyrightText: Copyright (c) 2026 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+# SPDX-License-Identifier: Apache-2.0
+
+name: dco-check
+
+on:
+  pull_request:
+    types: [opened, edited, synchronize, reopened]
+
+permissions:
+  contents: read
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  dco-check:
+    runs-on: ubuntu-latest
+    timeout-minutes: 5
+    steps:
+      - name: Check PR body for Signed-off-by
+        env:
+          PR_BODY: ${{ github.event.pull_request.body }}
+        run: |
+          normalized_body="$(printf '%s\n' "$PR_BODY" | tr -d '\r')"
+
+          if ! printf '%s\n' "$normalized_body" | grep -qP '^Signed-off-by:\s+.+\s+<[^<>]+>$'; then
+            echo "::error::PR description must contain a DCO sign-off line."
+            echo "::error::Expected format: Signed-off-by: Your Name <your-email@example.com>"
+            exit 1
+          fi
+
+          echo "PR description contains a DCO sign-off."