The 284th Engineer Combat Battalion was also part of the 1111th for a while. (April '45)
Will place info here about the 1111th Engineer Combat Group and the engineer Bn's under it
291st -Colonel Pergrin
51st - Colonel's Fraser and Yates
296th - Colonel Jack C. Jeffrey
202nd -
http://www.publications.usace.army.mil/Portals/76/Publications/EngineerPamphlets/EP_870-1-38.pdf
The 1111th Engineer Group in the Bulge
Army Engineers at the Battle of the Bulge - Belvior Eagle News
1111th Engineer Group in the Bulge: The Role of Engineers as Infantry in AirLand Battle Paperback – September 19, 2012
Battle of Malmedy - Battle of the Bulge Memories
ENGINEERS (BUILDERS AND FIGHTERS) IN THE BATTLE OF THE BULGE
US Army units - Battle of the Bulge
Lots more to follow, just getting started. Far from complete. Am doing research for a friend, so thought as I went along, would place data here....