 On August 6, 2004, Greenert assumed command of Seventh Fleet.Greenert's shore assignments include tours as COMSUBPAC staff fire control officer, program analyst for Office of the Chief of Naval Operations and the Chief of Naval Operations Strategic Studies Group and head of Navy Program Planning and Development Branch for the Chief of Naval Operations Staff in Washington, D.C.He served as director of the Operations Division in the Navy Comptroller Office from January 2000 through August 2002, and as deputy and chief of staff of U.S. Pacific Fleet from August 2002 until July 2004.