Dellorusso joined the Dynamo in 2017 after serving under Cabrera in the same role in 2015 for the Rio Grande Valley FC Toros, the Dynamo's hybrid USL affiliate. The Toros finished in second place in the Western Conference in their debut season in 2015. Dellorusso was head coach of Arizona United SC (USL) for two seasons, 2014-15. Before the head coach role, he was an assistant coach at the University of Maryland under Sasho Cirovski from 2010-13 as the Terrapins won two Atlantic Athletic Conference regular-season titles and three ACC tournaments. The team also reached the NCAA College Cup in two straight seasons (2012-13), with an appearance in the national title game in 2013.
As a player, Dellorusso helped Maryland reach four consecutive NCAA College Cups (2002-05) and was captain as the Terrapins won the 2005 National Championship. The Columbia, Maryland native was drafted by FC Dallas in 2006 and spent four seasons with the club and joined the Minnesota Thunder (USL) and Austin Aztex (USL) for loan spells.