Parker has held his current position at MARTA for nearly fives years.
Agency leaders are expected to announce an interim general manager in upcoming meetings and will soon launch a search for a permanent CEO.
Separately, the agency recently named Arthur “Rob” Troupe, a former Washington Metropolitan Area Transit Authority executive, as its executive deputy general manager. Starting Sept. 18, Troupe will report to the interim general manager.
Since joining the agency, Parker has helped balance the authority’s budget, improve efficiencies, increase rail service, and enhance customer experience. The agency currently has cash reserves in excess of $240 million.
The new leader will also be responsible for carrying through a 2016 ballot measure that could generate an estimated $2.5 billion in the next 40 years for high-capacity rail improvements, additional rail stations, and other adjustments.
See the news release online.