diff --git a/cmd/gopherbot/gopherbot.go b/cmd/gopherbot/gopherbot.go
index 3033646..31a2c86 100644
--- a/cmd/gopherbot/gopherbot.go
+++ b/cmd/gopherbot/gopherbot.go
@@ -1709,6 +1709,12 @@
 	return false
 }
 
+// assignReviewersOptOut lists contributors who have opted out from
+// having reviewers automatically added to their CLs.
+var assignReviewersOptOut = map[string]bool{
+	"mdempsky@google.com": true,
+}
+
 // assignReviewersToCLs looks for CLs with no humans in the reviewer or cc fields
 // that have been open for a short amount of time (enough of a signal that the
 // author does not intend to add anyone to the review), then assigns reviewers/ccs
@@ -1723,6 +1729,9 @@
 			if cl.Private || cl.WorkInProgress() || time.Since(cl.Created) < 10*time.Minute {
 				return nil
 			}
+			if assignReviewersOptOut[cl.Owner().Email()] {
+				return nil
+			}
 
 			// Don't auto-assign reviewers to CLs on shared branches;
 			// the presumption is that developers there will know which