4 Engineer Support Regiment

4 Engineer Support Regiment () is a regiment of the Canadian Military Engineers located at CFB Gagetown, New Brunswick. It is tasked to provide general engineer support to the whole of the Canadian Armed Forces.
4 ESR was officially formed when 4 Combat Engineer Regiment (4 CER) returned from CFB Lahr in Germany when 4 Canadian Mechanized Brigade Group was stood down. 4 CER absorbed 22 Field Squadron, a detached and independent unit affiliated with 2 Combat Engineer Regiment. 22 Field Squadron was stationed in CFB Gagetown supporting the 2nd Battalion The Royal Canadian Regiment Battle Group, the Combat Training Centre and 4 CER in Germany.
The unit consists of Regimental Headquarters, 42 Horizontal Construction Squadron, 43 Counter Improvised Explosive Device Squadron, 45 Vertical Construction Squadron, and 48 Combat Service Support Squadron.
References.
4 ESR ATD 12/13