From the very well connected Roger Stone:
According to Wikipedia, Manafort is an American lobbyist and political consultant. A former adviser to the presidential campaigns of George W. Bush, Bob Dole, George H.W. Bush, Ronald Reagan, and Gerald Ford, he is a senior partner in the firm Davis, Manafort and Freedman.
DMF does not appear to have a web page. According to SourceWatch, DMF is a Registered Foreign Agent for "Federal Republic of Nigeria".