Tour du Colorado
Dombrowski began mountain biking in 2006, cyclo-cross in 2007 and road racing in 2009, racing for local Virginia team Haymarket Bicycles. He competed with , a UCI Continental team, for the 2011 and 2012 seasons. During the 2012 season, Dombrowski garnered significant results. He won the Girobio, finished fourth at the Tour of Utah, and placed tenth at the USA Pro Cycling Challenge.