D-M majors selected for promotion Published June 15, 2011 DAVIS-MONTHAN AIR FORCE BASE, Ariz. -- Congratulations to D-M's newest lieutenant colonel selects! Maj. Bryan Bobeck, 355th Equipment Maintenance Squadron Maj. Amanda Brandt, 12th Air Force Maj. Octavio Echevarria, 79th Rescue Squadron Maj. Steven Ketchum, 355th Operations Support Squadron Maj. Sean Lowe, 612th Air and Space Operations Center Maj. Gregory Pickette, 12th Air Force Maj. Stephen Peute, 416th Flight Test Squadron Maj. Kenneth Sierra, 612th Air and Space Operations Center Maj. Darren Sokol, Army Headquarters, Ft. Huachuca Maj. Keith Wolak, 357th Fighter Squadron Congratulations to D-M's newest major select! Capt. Stephen Martin, 355th Medical Support Squadron