Steve Case is an agent with the CIA.
On our first encounter with Case, indeed the first page, second chapter, we are given a useful chunk of information that helps us quickly get an idea of the gravitas that the man brings to his adventures: "Steve Case, from Rock Hill in South Carolina, was tall, well over six feet, in his late thirties, ex-U.S. Special Forces and employed as a civilian communication engineer in the country [Afghanistan]. Chairing the hastily convened meeting, there was a report to prepare. He had a secondary and more discreet position as a CIA operative."
This series is really in two parts with the first book taking place at one point in Case's life and the next two likely occurring possibly as much as a decade later. For that reason I recommend reading them in order.
The Case who is the CIA agent while undercover in Afghanistan will evolve into Steve Case, head of Counter-Insurgencies, a private company whose main line of work is helping companies keep their people safe while traveling in very unsafe locales and, more importantly, in finding way to get those people out when things go wrong as they often did.
The earlier Case has a girl friend named Megan from Australia whom he meets while serving in Afghanistan. The later Case has a much loved wife of several years named Megan which shows that after leaving the Agency, Case not only created a company, he started a family. There is no indication of children, however.
Whichever Case we follow, though, the calmness and the intelligence with which the man goes about his business is impressive. He is not without his emotional side, naturally, but he is a fellow who thinks first and then acts.