After graduation, Bach moved to Cincinnati, Ohio, where he conducted business for a few years before returning to Colorado Springs. He stated that moving away from Colorado Springs was "The hardest day of my life. I know what it’s like to leave." He succeeded in selling real estate in the community, and founded his own brokerage firm.
Bach was one of at least 11 mayoral candidates who ran in the April 2011 election to determine the candidates for runoff. He campaigned in the non-partisan election on a platform of "shaking up City Hall" and bringing jobs to the city. Bach ran numerous television spots in both the primary round of voting and the runoff. The runoff election, held May 17, 2011, was between Bach and former City Councilman Richard Skorman, a downtown businessman and community Democrat. When the final results were calculated the next day, Bach had received 56,466 votes to Skorman's 42,315. The turnout was 64%, a high number for a local election in an off-year.
Bach was sworn in on June 7, 2011, at the city's historic Pioneers Museum downtown.