ハワイ・ウィンターリーグ
Meulens began his coaching career with the Bluefield Orioles for the 2003 and 2004 seasons. From -, he was the hitting coach of the Indianapolis Indians, the Triple-A affiliate of the Pittsburgh Pirates, also coaching in the Arizona Fall League for the Peoria Saguaros in 2005 and the Hawaii Winter Baseball league for the Honolulu Sharks in the 2006 off-season. In 2009, Meulens served as hitting coach for the Fresno Grizzlies, the AAA affiliate of the San Francisco Giants of the Pacific Coast League. Meulens reached the Major League ranks as batting coach in 2010, serving as hitting coach for the San Francisco Giants following the firing of previous hitting coach Carney Lansford.