diff --git a/vndk/tools/OWNERS b/vndk/tools/OWNERS
index 0a14ed43b..980fc754b 100644
--- a/vndk/tools/OWNERS
+++ b/vndk/tools/OWNERS
@@ -1,2 +1,2 @@
-per-file * = andrewhsieh@google.com, loganchien@google.com
+per-file * = andrewhsieh@google.com, hsinyichen@google.com, loganchien@google.com, tyanh@google.com
 per-file build_mixed = schwartzmi@google.com, justinyun@google.com
diff --git a/vndk/tools/definition-tool/OWNERS b/vndk/tools/definition-tool/OWNERS
index 402c92833..759c8dadf 100644
--- a/vndk/tools/definition-tool/OWNERS
+++ b/vndk/tools/definition-tool/OWNERS
@@ -1,2 +1,4 @@
 andrewhsieh@google.com
+hsinyichen@google.com
 loganchien@google.com
+tyanh@google.com
diff --git a/vndk/tools/header-checker/OWNERS b/vndk/tools/header-checker/OWNERS
index aeeae9cf2..50e9fd37e 100644
--- a/vndk/tools/header-checker/OWNERS
+++ b/vndk/tools/header-checker/OWNERS
@@ -2,3 +2,4 @@ andrewhsieh@google.com
 hsinyichen@google.com
 jchowdhary@google.com
 loganchien@google.com
+tyanh@google.com