diff --git common/includes/slack/announce/config.php common/includes/slack/announce/config.php
index 3c9571a2b..8ce9c0e7d 100644
--- common/includes/slack/announce/config.php
+++ common/includes/slack/announce/config.php
@@ -297,13 +297,16 @@ function get_whitelist() {
 
 function get_committers() {
 	return array(
-		'dd32', 'nacin', 'helen', 'azaozz', 'westi',
+		'matt', 'dd32', 'nacin', 'helen', 'azaozz', 'westi',
 		'ocean90', 'wonderboymusic', 'johnbillion',
-		'jorbin', 'jeremyfelt', 'pento', 'obenland', 'iseulde',
+		'jorbin', 'jeremyfelt', 'pento', 'obenland',
 		'westonruter', 'afercia', 'karmatosed', 'rmccue', 'michaelarestad',
 		'swissspidy', 'rachelbaker', 'joehoyle', 'melchoyce',
 		'peterwilsoncc', 'joemcgill', 'davidakennedy', 'adamsilverstein',
-		'flixos90', 'iandunn', 'kadamwhite',
+		'flixos90', 'iandunn', 'kadamwhite', 'jrf', 'atimmer', 'laurelfulford',
+		'allendav', 'omarreiss', 'allancole', 'lonelyvegan', 'antpb', 'mcsf',
+		'herregroen', 'youknowriad', 'gziolo', 'aduth', 'jorgefilipecosta',
+		'bpayton', 'noisysocks', 'desrosj', 'tellyworth',
 
 		'markjaquith',    // @mark on Slack
 		'nbachiyski',     // @nb on Slack
@@ -314,6 +317,8 @@ function get_committers() {
 		'mikeschroder',   // @mike on Slack
 		'jnylen0',        // @jnylen on Slack
 		'matveb',         // @matias on Slack
+		'iseulde',        // @ella on Slack
+		'johnjamesjacoby' // @JJJ on Slack
 	);
 }
 
diff --git common/includes/slack/announce/lib.php common/includes/slack/announce/lib.php
index 6f78a9d44..68853d487 100644
--- common/includes/slack/announce/lib.php
+++ common/includes/slack/announce/lib.php
@@ -83,18 +83,7 @@ function run( $data ) {
 		return;
 	}
 
-	if ( $data['command'] === '/committers' ) {
-		// This command seems to not be used actively, in preference for the slack @committers group pings.
-		$committers = get_committers();
-		if ( ! in_array( $user, $committers, true ) ) {
-			return;
-		}
-
-		// TODO: Note that pinging users by `@username` is deprecated, and we now have WordPress.org usernames in the above list.
-		// This should be upadted to ping users by the `<@U.....>` format.
-
-		$text = sprintf( "*@committers:* %s\n_(cc: %s)_", $data['text'], '@' . implode( ', @', $committers ) );
-	} elseif ( $data['command'] === '/deputies' ) {
+	if ( $data['command'] === '/deputies' ) {
 		$pingable_deputies = get_pingable_wordcamp_deputies();
 
 		if ( ! in_array( $user, $pingable_deputies, true ) ) {