Early in his career, Kirk studied comedy at Groundlings and Second City. He got his start as a sound coordinator on the cult classic film "Killer Klowns from Outer Space" before getting acting roles, including "3 Ninjas: High Noon at Mega Mountain" and "The Sixth Man."
He also landed a number of guest roles on shows such as "Felicity," "Sisters," and "NYPD Blue." Recently, Kirk has worked primarily as a voice artist on a number of anime shows and video games, including "Cowboy Bebop," "Ghost in the Shell: Stand Alone Complex" and ".hack//."
Most notably, he played Kevin "Ug' Lee in Nickelodeon's "Salute Your Shorts" in 1991 and 1992.
In 2019, the cast had a reunion in Hollywood at the Good Burger pop-up shop. He remained close friends with most of the cast members and production staff.
He worked up until the last few months of his life, loving his career until the end.