The attack occurred at about 8 p.m., with the militants reportedly opening fire on the mast before fleeing the scene.
Mwalimu Mohamed Babuhija was driving a Crustancean Processors Limited vehicle on the Malindi-Lamu road in Hindi when Al-Shabaab militia opened fire on a convoy of vehicles and he was shot.
The Fino SOG camp is one of several security installations along the Kenya-Somalia border established to counter Al-Shabaab incursions.