Thomas Eimermacher started his road racing career by earning his CMRA racing license in June of 2012. The 37-year old biologist and college instructor had only been doing track days since April of 2011, and was following his passion to see if he could live up to the challenge of racing motorcycles. Thomas joined team BTO Racing and competed in the CMRA mini endurance series on a Kawasaki Ninja EX250 in Formula 4, where the team finished the season with a 21st place of 34 teams in class.
In 2013, he continued to race with BTO Racing as the team captain, and also sprint raced his Suzuki SV650 in Formula 2, Lightweight Twins, and Superbike D. He progressed quickly, and finished the season with one win, nine podiums and 14 top-5 finishes. This led him to a 2nd place overall in Lightweight Twins, and a 3rd place overall in both Formula 2 and Superbike D. His team BTO Racing finished the season with a 13th place out of 46 teams overall in the mini endurance series.
In 2014, Thomas joined the CMRA big bike endurance team Full Tilt Racing, with which he achieved seven podium finishes, earning them a 3rd place overall in Modern Classic. He also sprint raced his Suzuki SV650 in Formula 2 and Lightweight Twins, and a Yamaha YZF-R6 in Superbike B, Superbike C, and Team 60 with Brandie Cox. He completed the sprint season with a total of 18 podium finishes, including six wins, which earned him two overall podiums, including the 2014 championship in Formula 2.