Comment by KineticLensman

> Then they move to the "back seat" and consult or assist from far away

Probably not. The article mentions two active bomb disposal soldiers whose rank is Major or higher, and a colonel who oversees operations. This seems like a standard military career progression, not specific to the EOD regiment. In the armoured infantry, for example, a company commander (i.e. a Major) might still fight as a dismount, delegating a sergeant to stay in their vehicle to command it.

Also note that in the British Army, soldiers of all trades often move jobs every couple of years, sometime returning to a particular organisation but now with a higher rank.