Well, since it's here now, allow me to mention "The Phoenix Conspiracy" series by Richard L. Sanders.
"On the surface, the galaxy seems peaceful. The war is over. An era of trade and prosperity has begun. But to those who can read the signs, it’s clear something is wrong. Long, dark fingers are pulling strings inside the military, making deals across empires, and orchestrating something foul.
Calvin Cross is an intelligence agent for the Imperial government. He’s young, his methods are unorthodox, but he gets the job done. So when a former military hero steals a warship and goes rogue, threatening to start a war, Calvin is sent to find him and end him."
Three books so far with the fourth set to be released soon.
http://richardlsanders.com/