Ahern is one of the few white comics to perform on both Comic View and Showtime at the Apollo. He wrote for several years for US Weekly´s fashion police and has sold jokes to the Tonight Show. His numerous commercial credits include a 7-Up spot directed by Ridley Scott. In addition to being an in demand standup comic he also improvises and performs sketch regularly at ACME Comedy Theatre in Los Angeles. He has performed with the Second City in Detroit as well as the Improv Olympic house team Inside Vladimir Jeff can also be heard on Sirius/XM Raw Dog comedy channel.