Cliff Remington is an agent with the CIA.
He was an agent, at least. He had worked for them for many years in numerous hotspots around the world and was the best man for a very sensitive job, along with top people from other bureaus and governmental departments. When they had all accomplished the mission, the agents were each stripped of their memories through drugs and hypnosis and brain washing. Those doing the memory stripping would normally have had them killed but there was a chance that the mission needed un-doing and so for that the agents might be needed. So the plan was to make them forget who they were and what they knew but keep them alive in case they were needed again.
That is how the series begins. Remington is convinced he is going crazy because the amnesia that was induced is causing new problems, making him periodically forget who he now is as well as not remembering who he once was.
The two-book series about the highly resourceful, immensely confident, and very dangerous agent named Remington is really a side trip in his career with the Agency. The first book details how he slowly regains his memory all the while being put into harm's way by friend and foe. The second book is how, once he has completely left the cloak and dagger world for a new life, it pulls him back into its grasp in a terribly brutal manner, only to discover that Remington is capable of a lot when he is angered.
Remington is in his mid 40's when the stories take place. He was an agent with the CIA for nearly twenty years, married with a young daughter at the time of his amnesia. He makes his "normal" living as a landscaper and is very good at it, enjoying the hard work and the outdoors. He no longer wants to be an agent, no matter how good he was at it. He is given no choice.