By Jeremy Herb - 12/06/12 07:58 PM EST
The Pentagon’s top lawyer, Jeh Johnson, is resigning at the end of the year to return to private practice.
Johnson sent a resignation letter to President Obama on Thursday announcing he would leave his position as Pentagon general counsel.
Johnson played a key role from inside the Pentagon on the repeal of “Don’t ask, don’t tell,” leading a department review on the policy under then-Defense Secretary Robert Gates.
Johnson was part of Obama’s transition team in 2008 and has served in his role at the Pentagon since 2009.