Alex Dorring is an agent with MI-6.
Was is the more accurate word. He was an agent in good standing for several years, part of a highly specialized group of assassins making up the group known inside the department as Uriel.
Then a mission a decade ago went horribly wrong and Dorring became a prisoner of MI-6's Pit, a repository for former operatives who are considered broken and unsalvageable. The next few years will not be pleasant.
And then the activities of the first recorded adventure take place and Dorring, aka Agent 192, is broken out and taken swiftly to a remote camp in Syria. Why and who did the snatching would be slowly revealed.
More on this series when I have finished the books.