On TV, Behr puppeteered and did voices in Stargate SG-1. He also provides narration for documentaries on TV and voice-overs for commercials and films. He has won 6 Cannes Lions,Voiced 2 Clio Award winning commercials, 2 D&AD In-book Award and Voiced 2 Grands Prix, numerous Gold, Silver, 2 Bronze-winning campaigns in the Loerie Advertising Awards, as well as the Gold Apex Award-winner for 2012, and has Voiced the Gold Loerie Award-winning campaign , for "Frank.net" and is the ongoing voice of the company. He is also the signature voice of many products and companies worldwide, and the station ID voice for several international radio stations. He voices movie and video game trailers, and also characters for animation, and is one of the voice artists on the political satire puppet series zanews.
He has worked as a puppeteer and effects artist on several projects, including Cats and Dogs, Cats and Dogs 2: The revenge of Kitty Galore, I, Robot, Alien vs Predator 2, Snakes on a Plane, Slither, The Santa Clause 2, Scary Movie 3, The Sixth Day, and Willard, among others and TV credits include, The X-Files, Millennium, Stargate SG-1, The Outer Limits, Poltergeist: The Legacy, The New Addams Family, Teenage Mutant Ninja Turtles: The Next Mutation, and many more.
He has also done voice-over work in other languages including Zulu, Afrikaans, and Swahili. He is the signature voice for various broadcast channels, and cartoon characters for both television and feature films, including prominent animation voice roles in Jim Henson's Dinosaur Train, Land of the Lost, the feature film with Will Ferrell, the voice of the lead villain, "Titanium Chef" in CBS's Sushi Pack, and many more.