Matt Gelman is a lobbyist employed by Microsoft with the title Director of Federal Government Affairs. He manages Microsoft's relationship with Democrats in the House of Representatives. Previously he worked at the lobbying and public relations firm PodestaMattoon. Before that he worked on the House Democratic leadership staff. 
In a review of Washington D.C.-based lobbyists The Hill wrote, "Gelman took a hiatus to help Rep. James Clyburn (D-S.C.) build his whip team, but is now back." 
- Jeffrey H. Birnbaum, "The Gelman Update", Washington Post, January 23, 2007.