Justice Department Chief of Staff Grindler is leaving Posted at 04:47 PM ET, 12/03/2012 Gary G. Grindler, chief of staff for Attorney General Eric Holder and before that acting deputy attorney general in 2010. is headed out Wednesday, most likely to the private sector. This was Grindler's second tour at Justice, having been there during the Clinton administration as a counsel to Attorney General Janet Reno and deputy chief of the civil division. Margaret Richardson, current deputy chief of staff, moves up to replace him. His announcement comes after word that Lanny Breuer, assistant AG for the criminal division, is also said to be heading for the exit, perhaps by year's end. Another talked-about departure is Ignacia Moreno, the assistant AG for the environmental and natural resources division. Oft-times, such movement signals a change at the top, but we're still hearing that Holder is staying, perhaps until next fall, after a potential battle over a successor for FBI chief Robert Mueller. The special two-year extension to his 10-year term expires Sept.