diff --git a/.github/CODEOWNERS b/.github/CODEOWNERS
new file mode 100644
index 00000000..e21eb977
--- /dev/null
+++ b/.github/CODEOWNERS
@@ -0,0 +1,5 @@
+# Request CDM Maintainers review for every pull request.
+* @ClouGence/cdm-maintainers
+
+# Protect reviewer routing changes.
+/.github/CODEOWNERS @ClouGence/cdm-maintainers