4 Engineer Support Regiment

4 Engineer Support Regiment (French: 4^e Régiment d'appui du génie) 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 Engineer Support Regiment
4e Régiment d'appui du génie  (French)
Active	1977–present
Country	Canada
Branch	Canadian Army
Type	Engineering support
Size	Four squadrons. 450 pers (approx)
Part of	Canadian Combat Support Brigade
Garrison/HQ	5 CDSB Gagetown
Commanders
Commanding Officer	LCol C. Cotton, CD
Previous Commanding Officer	LCol W.A. Taylor, MSC, CD
Deputy Commanding Officer	Maj R.L. Horton, CD, PMP
Regimental Sergeant Major	CWO G. Martin, CD
Adjutant	Capt P. Reid
Insignia
NATO Map Symbol
Abbreviation	4 ESR

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.