Right after graduating from high school in 1997, Gubman worked for producer C. J. Vanston in Hollywood, and assisted on projects with Michael Bolton, Carole King, and the Christopher Guest's film "Best in Show".
In 2006, after graduating from University, Gubman co-composed, along with composer Jeff Kurtenacker, the soundtrack for the videogame "Pirates of the Burning Sea", a massively multiplayer online role-playing game developed by Flying Lab Software and published by Sony Online Entertainment.
[3] Gubman's notable collaborations include singer Traci Hines,[7] violinist Taylor Davis,[8] composer Austin Wintory and the "Critical Hit band".
[9] As a contract composer, Gubman has written for NBC television broadcasts of the 2012 Winter Olympics, the 2012 Presidential Election and the 2011 Royal Wedding.
In 2013, under the direction of Warner/Chappell Music, Gubman composed a replacement for NBC's Today theme, which has been previously written by John Williams.