The Engineer Battalion plays a supportive role on the battlefield performing such tasks as fortification, bridge and road construction or destruction, laying or clearing landmines, neutralization of improvised explosive devices (IEDs) and general engineering tasks under fire.

More generally speaking, the combat engineer's tasks involve facilitating movement and support of friendly forces while impeding that of the enemy.

The telegraph company was formed into four cable squads, three of which were sent to the front to repair and rebuild lines on recaptured territories.

On 22 February 1919, a decree was released by the Staff of the Ministry of War, according to which the flight squadron was formed into the Estonian Air Force.

Between 31 August 1920 and 11 September 1922, the battalion was headed by captain G. Meister, then temporarily by major Gustav Vladimir Kirschbaum until January 17, 1923, when the position was taken over by Johann Bernhard Grünberg.

The new units were subordinated to the Engineer Force Inspectorate (Estonian: Inseneriväe inspektuur) of the General Staff, headed by Rieberg.

In 1939, the searchlight unit was reformed into the Park Company, which was responsible for all of the equipment of the Pioneer Battalion.

The best students from that course were sent to the Estonian National Defence College, after which they could continue service in the Pioneer Battalion.

By the end of 1930's the Pioneer Battalion was generally considered to be decently equipped, though mobilization reserves were inadequate.

By 1940, the battalion was equipped with: nine trucks, one car, three flamethrowers, three tractors, one excavator, one tracked transporter and other equipment, such as compressors, generators, outboard motors, concrete mixers, boring machines, rams, chainsaws etc.

Furthermore, due to limited motorization and wide dispersion of equipment depots, the formation of the units during mobilization would have been cumbersome and slow.

[4] In 2003, an EOD team was sent to Afghanistan for ordnance disposal and demining tasks as part of ISAF.

On December 15, 2015, lieutenant colonel Eero Tepp became the units commander,[11] but was replaced by major Priit Heinloo on November 1, 2016, due to a drunk driving incident.

[17] Based on the needs of the Estonian Defence Forces, one of the important tasks has been the development of bridging capabilities.

To support this development, the battalion received four new TMM-3M vehicle-launched bridges mounted on KrAZ trucks in 2015.

In addition to this, a number of different armored engineering vehicles based on the Leopard 1 platform were ordered from Netherlands in 2014.

[5] Since 2015, the battalions technical platoons also operate two specially modified Mercedes-Benz Unimog U5000 trucks.