Mauler

Brendon Doyle is a mercenary working for A.I.M. under the code name Mauler

Biography
Mauler infiltrated the appeared on the S.H.I.E.L.D. Helicarrier under Kearson DeWitt's orders, placing bombs all over the aircraft to destroy it.

Iron Man arrived at the Helicarrier, and managed to disarm the bombs and defeat Mauler, blasting a bomb that Mauler to do it.

Iron Man had to defeat Mauler once again disarming multiple bombs in the process.