Tubert's introduction to theatre came at the age of three, in Garcia Lorca's Yerma, when a child actor in a visiting troupe became ill.
As those roles grew larger, he was also proving his versatility, establishing himself in theatre and with commercial and voiceover work.
Tubert's recurring and guest-starring appearances include such shows as Prison Break, NCIS, Jane the Virgin, New Girl CSI:Miami, Supah Ninjas, Without a Trace, ER, The War At Home, Monk, George Lopez, JAG, Frasier, L.A. Law, Seinfeld, Star Trek: The Next Generation, The Golden Girls and Star Trek: Picard.
Tubert's numerous film roles include parts in the films Miss Congeniality 2: Armed and Fabulous, Tremors 2: Aftershocks, Postcards from the Edge, and the 1989 Roger Corman-produced remake of The Masque of the Red Death.
He has also contributed additional voices to Kung Fu Panda 2, Madagascar: Escape 2 Africa, Over the Hedge, Shrek 2, Shark Tale, Apocalypto, and The Passion of the Christ.