After his playing career ended, he was the
manager of the
Salt Lake Stingers from 2002 to 2004, compiling a 202–229 record. From 2005 to 2007 he was the minor league field coordinator for the
Texas Rangers. He was the manager of the
Ogden Raptors for the 2008 season. During 2009, Brumley worked in the
Los Angeles Dodgers system, overseeing all aspects of instruction in the Dodgers minor league system. The Mariners hired him to serve as the team's third-base coach in 2010, replacing
Bruce Hines. Brumley later moved to the first-base coach's box for Seattle. He joined the coaching staff of new Cubs manager
Rick Renteria for 2014 as assistant hitting coach but was dismissed from his position at the end of that season. Brumley was the minor league hitting coordinator for the
Atlanta Braves from 2018 to 2022.
Austin Riley credited Brumley with helping him to make a significant change to the mental aspect of his at bats, learning to recognize where an off-speed pitch would land, and avoid swinging at the
sliders that pitchers had used against him in prior years. Brumley continued to work with Riley on his swing in the years after he stopped working for the Braves. ==Personal life==