The Bounty Hunter by Jasper T. Scott

FROM OUTLAW TO BOUNTY HUNTER TO VIGILANTE
Cade Korbin was a Paladin, a member of the Coalition’s elite special forces. He did their dirty work and cleaned up their messes. Until his dark ops went public, and he was drummed out of the service with a dishonorable discharge.

Forced to the fringes of society by his service record, Cade broke the law just to survive. Then the Enforcers caught him, and he served his time. Sick of the hypocrisy in the supposedly utopian Coalition, he made a life among his former enemies in the Free Systems Alliance. Now he hunts the galaxy’s worst lowlifes, for a fee, and the only orders he takes are his own.

But when his past catches up with him, Cade is forced to fight for more than just credits.
This time, he’s in it for revenge.