Alphonso "Mack" Mackenzie is a mechanic, engineer and field agent, with a complicated relationship with S.H.I.E.L.D. who has proven loyal to the cause and handy with a shotgun ax.
Alphonso “Mac” Mackenzie acts as the CIA’s liaison with S.H.I.E.L.D. and often helps out on missions. Due to his disdain over alien technology and overarching powers, he ends up developing a strained relationship with Director Nick Fury.