Michael Tremain Sinterniklaas (born August 13, 1972) is an American voice actor, ADR director and script writer who has provided voices for a number of English-language versions of Japanese anime films and television series, as well as video games and cartoons. He has worked for Studiopolis, Funimation, 4Kids Entertainment, Central Park Media, Bandai Entertainment, Viz Media and Media Blasters. He is the founder and owner of NYAV Post, a Bi-coastal studio located in New York City and Los Angeles, which dubbed many different anime titles and recorded several original prelay works.

He is best known for his roles as Leonardo in 2003 series of Teenage Mutant Ninja Turtles and Dean Venture in The Venture Bros.