Joint Center for Political and Economic Studies names Spencer...

Joint Center for Political and Economic Studies names Spencer Overton, on sabbatical from George Washington University, as interim president and CEO … CSG promotions to slots at its new CSG Invotas business: Mike Henderson, president; Paul Nguyen, president, global security solutions; Fred Brott, president, government solutions; Dwayne Ruffin, chief-global market development; and Jessica Gulick, ex-SAIC, hired as chief strategist … Warburg Pincus private-equity firm names Dinesh Moorjani, ex-Hatch Labs, as executive-in-residence, where he'll work on the mobile industry … Lobbyist registration: Comcast, Holland & Knight, effective Jan. 1.