Former Treasury Secretary Timothy Geithner has, predictably, cashed in his favors to Wall Street by joining a financial services firm, Warburg Pincus. According to a press release from the private equity firm, Geithner will be President of the company and a Managing Director as well as a member of the Executive Management Group. In other words, Geithner will be well compensated at Warburg Pincus which has over $35 billion of assets under management.