His company, The KNB EFX Group (KNB) was co-founded by Greg & Howard Berger in 1988 and has contributed special make-up and creature effects on over 700 film and television projects such as Sin City, Inglourious Basterds, This is The End, Dances with Wolves, The Amazing Spiderman 2, The Grey and Pulp Fiction, to The Green Mile, The Book of Eli and Piranha.