Roy Clark, a Nationals assistant general manager and vice president of player personnel who helped overhaul the organization’s drafting and farm system, has left the team, according to General Manager Mike Rizzo. Clark has been hired by the Los Angeles Dodgers, according to an ESPN report. The move reunites Clark once again with Dodgers president and part-owner Stan Kasten, who was the Nationals’ president when Clark was hired in 2009.

Clark joined the Nationals four years ago as part of the team’s front office rebuild under Rizzo before the 2010 season. The Nationals lured Clark away from the Atlanta Braves, where he spent 11 years as their scouting director and help develop them into a perennial contender through the draft. Kasten left the Braves for the Nationals after the 2003 season and Clark later followed.

Clark, known for his sharp eye for talent, helped improve the Nationals farm system through the draft and player development. He oversaw the drafting of Bryce Harper, Anthony Rendon, Alex Meyer (traded for Denard Span), Brian Goodwin and Lucas Giolito, and the less-heralded draft picks that have helped transform the Nationals minor leagues. Before the Gio Gonzalez trade, the Nationals were recognized in 2012 as the best farm system in all of baseball just five years after being ranked dead last.

Now, the Nationals will be need to make some tweaks in their front office. Rizzo said the Nationals would later announce the changes. The move was first reported by ESPN. The move to Los Angeles is a potentially revealing one for the Dodgers, who have spent lavishly to build a contender but could also be focused on drafting and developing well with Clark in the fold. Adam Kilgore contributed to this report.