Don Miles is an agent with the Central Security Council.
According to the Director of Operations of the CSC, who goes by the name of Hedge, the best way to sneak an agent into a country is out in the open. If you send someone that everyone already expects to be there, no special notice is made. Thus his agency has recruited an assortment of men and women at the top of their differing fields, trained them in all they might need as an agent, and then let them go back to their normal lives. If and when one travels to a place where the CSC needs something done, there they are.
Don Miles, a young man still in his late 20's or early 30's at the start of the series, is the wealthy son of an oil baron who has learned the trade literally from the ground up and has expanded the business considerably before turning day-to-day operations to his key people and taking up his true passion, auto racing. Somewhere in between he had served a tour in the Korean conflict. A minor accident while test-driving his revolutionary car, the Panther, gave Hedge the opportunity to fake a major injury for Miles and give him six months of intensive training.
Now Miles travels the world with his famous racing team, competing in major events while secretly working on behalf of the U.S. government. When the cover of the racing to protect his operations do not quite cover him enough, his oil business certainly can as everyone is interested in oil money.
Miles has gone through all the normal training an operative would have and is skilled in hand-to-hand, weaponry, stalking, and B&E. He is a deadly weapon when he needs to be, and a handsome, suave and smooth operator when that works.