When you play the officer role you will notice the "Battle Command" ability which is your E ability on PC, LB+RB on Xbox and L1+R1 on PS4. If you use this ability near a teammate it will boost them.
The Fastest way to unlock this achievement is to play the Supremacy Game mode and boost your allies at the very start of the game before everyone runs off but throughout the game there will be big groups of teammate that you can boost. rinse and repeat until achievement pops