diff --git a/.github/CODEOWNERS b/.github/CODEOWNERS
index d45d5454544..e07cd99de9a 100644
--- a/.github/CODEOWNERS
+++ b/.github/CODEOWNERS
@@ -3,5 +3,7 @@
 # repository as the source of truth for module ownership.
 /**/OWNERS @markdroth @nicolasnoble @a11r
 /bazel/** @nicolasnoble @dgquintas @a11r @vjpai
+/cmake/** @jtattermusch @nicolasnoble @matt-kwong
 /src/core/ext/filters/client_channel/** @markdroth @dgquintas @a11r
+/tools/dockerfile/** @jtattermusch @matt-kwong @nicolasnoble
 /tools/run_tests/performance/** @ncteisen @matt-kwong @ctiller