{{Short description|Canadian military unit}} {{Use Canadian English|date=January 2023}} {{More citations needed|date=June 2022}} {{Infobox military unit | unit_name = 4 Engineer Support Regiment | native_name = {{native name|fr|nolink=on|4<sup>e</sup> Régiment d'appui du génie}} | image = CCSB-4ESR.png | caption = | dates = 1977–present | country = Canada | branch = Canadian Army | type = Engineering support | role = | size = Four squadrons. 450 pers (approx) | command_structure = 6 Canadian Combat Support Brigade | garrison = 5 CDSB Gagetown <!-- Command Team -->| website = https://www.canada.ca/en/army/corporate/5-canadian-division/4-engineer-support-regiment.html | commander1 = LCol Ian Summerfield, CD | commander1_label = Commanding officer | commander2 = LCol Adam Porrier, CD | commander2_label = Previous commanding officer | commander3 = Maj Shawn Burdett, CD | commander3_label = Deputy commanding officer | commander4 = CWO F.W. Cross, CD | commander4_label = Regimental sergeant major | commander5 = Capt J. Crombach | commander5_label = Adjutant | nickname = | motto = | march = | mascot = | anniversaries = | identification_symbol = 100px<br />100px | identification_symbol_label = NATO Map Symbol | identification_symbol_4 = 4 ESR | identification_symbol_4_label = Abbreviation }}
'''4 Engineer Support Regiment''' ({{langx|fr|links=no|4<sup>e</sup> Régiment d'appui du génie}}) is a regiment of the Canadian Military Engineers headquartered at CFB Gagetown, New Brunswick. It is tasked to provide general engineer support to the whole of the Canadian Armed Forces.<ref name=":0">{{Cite web |last=Defence |first=National |date=2019-01-28 |title=4 Engineer Support Regiment |url=https://www.canada.ca/en/department-national-defence/services/military-history/history-heritage/official-military-history-lineages/lineages/engineer-regiments/4-engineer-support.html |access-date=2022-05-26 |website=www.canada.ca}}</ref><ref>{{Cite web |last=National Defence |first=Canadian Army |date=2013-02-25 |title=4 Engineer Support Regiment |url=https://www.canada.ca/en/army/corporate/5-canadian-division/4-engineer-support-regiment.html |access-date=2022-05-26 |website=www.canada.ca}}</ref>
4 ESR was officially formed in 1993 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.<ref name=":0" />
On 1 June 2022, the perpetuation of No. 2 Construction Battalion of the First World War Canadian Expeditionary Force was assigned to the Canadian Military Engineers, with 4 Engineer Support Regiment being responsible for ongoing public recognition of the perpetuation.<ref>Canadian Forces General Order 079/22</ref>
== Lineage ==
=== 4 Engineer Support Regiment ===
* Originated on 17 June 1977, in Lahr, Germany, as 4 Combat Engineer Regiment. * Redesignated on 4 September 1992, as 4th Engineer Support Regiment. * Redesignated on 30 September 1993, as 4 Engineer Support Regiment.<ref name=":0" />
=== 4 Field Engineer Squadron ===
* Originated on 1 August 1951, in Petawawa, Ontario, as 59th Independent Field Squadron, RCE. * Redesignated on 16 October 1953, as 4th Field Squadron, RCE. * Redesignated on 30 April 1958, as 4 Field Squadron. * Redesignated on 21 May 1975, as 4 Field Engineer Squadron. * Reorganized as a regiment on 17 June 1977, and Designated as 4 Combat Engineer Regiment.<ref name=":0" />
== Sub-units == {{Unreferenced section|date=June 2025}} {{As of|2025}} the unit consists of:
* Regimental Headquarters * 42 Field Squadron ** 21 Field Troop ** 22 Field Troop * 43 Counter Explosive Threat Squadron ** 31 Search Troop ** 32 Explosive Ordinance Disposal Troop * 45 Support Squadron ** 51 Heavy Equipment Troop ** 52 Resource Troop ** 53 Construction Troop * 48 Combat Service Support Squadron ** Logistics Troop ** Maintenance Troop
==See also== {{Portal|Canada}} * Military history of Canada * History of the Canadian Army * Canadian Forces * List of armouries in Canada
==References== {{Reflist}} *4 ESR ATD 12/13
==Order of precedence== {{s-start}} {{order of precedence | before= 2 Combat Engineer Regiment | title =4 Engineer Support Regiment | after= 5 Combat Engineer Regiment }} {{s-end}}
{{Royal Canadian Engineer Regiments}}
Category:Engineer regiments of Canada Category:Military units and formations established in 1977