Wittenberg voices Kakashi Hatake in Naruto, Michael Lee in Witch Hunter Robin. Bash Johnson in Randy Cunningham: 9th Grade Ninja, Franz’s singing voice in the Disney animated film Planes, Vision in Marvel Heroes, Lang Rangler in JoJo’s Bizarre Adventure: Stone Ocean, and Time Baby in Gravity Falls. In video games, he voices Trigger Happy from the Skylanders series, Mad Doctor from Epic Mickey, and Buddy Alexander from Resident Evil: Damnation.

He is also an adaptive scriptwriter for English dubs of anime whose work includes episodes of Digimon. Wittenberg also narrates many documentaries and specials for the Travel Channel and Food Network.