I'm not sure if this is what you are seeking but the US Army used manuals to train the soldier for about everything. Of course, Engineers had to be pretty specialized for some types of operations.
For example, Fort Sill, OK, was the home of the field artillery school and it put out manuals for artillerymen---everything on auto-maintenance to the speciality training for horse artillery. The same is true for the Engineer but I'm not sure what Amy base had the primary responsibility.
There was a Field Manual for the average engineer soldier: FM 21-105 - Basic Field Manual: Engineer Soldier's Handbook. This book began with the basics of how to swing an axe and use a shovel to how to lay steel mat for runways. It is a good start to understand the engineer's job duties.
I've seen more specialized field manuals, too. I think there was one on Camoflage, but that might have been a regular infantry manual.
So, I would recommend looking for some field manuals. There are some guys out there who are scanning these into CDs for equick reference.
Steve