What's daily life as a 12B like on Active Duty?

Regular Army, 65th Engineers, 25th Infantry Division Vietnam, '66-'67. Most time in field with Infantry units as a "demo man." Mine field extraction, neutralize booby traps, eliminate dud artillery, blow-up tunnel complexes, sweep roads for mines, side-by-side with Infantry fire fights and ambushes. Most important work I ever performed in my entire life.

I was with the 1st Armor Division out of Germany and the 1st Infantry Division out of Ft. Riley. We spent the vast majority of our time in the motor pool working on vehicles & equipment, with typically 1-2 days at most of an average week working on MOS training.

Field problems were a couple times per year and typically 1-2 weeks; while I was at Riley we went to JRTC and NTC for a little over a month each.

I missed the big Graf/Hoehnfels training center rotations by about a month between when I PCS'd in and out due to 3/4 of my Germany time spent in Iraq.

My first deployment (2003) we did a little bit of everything from sector security to checkpoints to fortifying culverts & bridges along supply routes. The second time (2006) we were exclusively route clearance.

My time as a 12B while on Active Duty consisted of the Motor Pool most of the month (we were mechanized at part of the 11th ACR at FT Irwin) and in the field for 1 week a month. We did Demolitions Ranges about every 3-4 months. So, I think the answer(s) to your question will vary from base to base.