Then-Deputy Defense Secretary William Lynn (left) presents Army Gen. David Petraeus with a medal upon his retirement in August. (SAUL LOEB/AFP/GETTY IMAGES)

The company is expected to announce tomorrow that Lynn, who served under defense secretaries Robert Gates and Leon Panetta, is the new chairman and CEO of DRS Technologies, a U.S.-based defense electronics contractor. This isn’t Lynn’s first stint in the private sector: Before President Obama named him to the Pentagon post, he was a top executive at Raytheon. Before that, Lynn was defense counsel to the late senator Edward Kennedy (D-Mass.) and undersecretary of defense in the Clinton administration.

He’ll replace DRS chief Mark Newman, who is retiring.