Major Gen. Michael R. Lehnert, commanding officer, Marine Corps Installations West, stands alongside his new sergeant major, Sgt. Maj. Jeffery H. Dixon, as he hands his former advisor, Sgt. Maj. Barbara J. Titus a flag flown above the national capitol building for her retirement. - Major Gen. Michael R. Lehnert, commanding officer, Marine Corps Installations West, stands alongside his new sergeant major, Sgt. Maj. Jeffery H. Dixon, as he hands his former advisor, Sgt. Maj. Barbara J. Titus a flag flown above the national capitol building for her retirement.