Allegany County Miner, Merchant and Banker, Democrat
Comptroller - 1916-1920
Western Maryland's one representative in the Comptroller's office, Mc Mullen was a highly successful local businessman. He was a miner and a prospector in Colorado for a time. Returning home, he and two brothers became merchants and opened the first department store in Cumberland, the town's first bank, and two coal mines, one in West Virginia and another in Kentucky. As Comptroller, McMullen was best remembered for getting Marylanders to concentrate on emergency needs created by World War I.