A military officer acting as secretary to a general is called this "de-camp"
[DOC] [TLE] United States Government Manual (1996-1997) Edition ... [PAR] May 31, 1996 ... R. Mark Brown Aides-de-Camp Lt. Col. ... John Minahan Assistant Secretary of 
the Army (Civil Works) H. ... Deputy Assistant John H. Zirschky Secretary 
Executive Officer Col. ... Mark S. Roupas Deputy Assistant Secretary for Ray Fatz