Wiley Wolf, aka Werewolf, is an agent with the CIA.
To be more accurate, we are never given that acronym; we are told the organization was "Central Intelligence" with its headquarters, albeit a very secret one, in D.C. but to think that a large department like the CIA would allow another department to usurp two thirds of its name ... uhuh, it's the CIA.
When we meet Wolf, he is Major Wolf of the USAF and he is flying a jet over the frozen Arctic region on a secret mission (we are never told what) when his plane experiences an explosion in the engine; he calls it in and then tries to eject but that mechanism fails and he goes down with the craft. Miraculously he survives, being thrown out into the deep snow.
Coming to after a bit he finds himself surrounded by wolves, one of which is injured somehow. He decides to build a fire and wrap the hurting canine in a blanket (why was there a blanket on a single-seat fighter jet?) and he nurses the wild animal back to health. For the next six months he lives in that desolate area with that wild pack until another plane spots him and he is rescued. He takes the wolf, which he named Thor, with him.
It is upon arriving in D.C. that the Agency sends a beautiful blonde named Judy to escort him to HQ. That is a bit surprising to Wolf, as is the fact that the word of his survival has been kept a total secret - no one, including his friends and family, knew he was still alive - and they want it that way.
Central Intelligence wants Wolf to be an agent, based on the extraordinary feat of having survived so long in the northernmost part of Canada. It has a new division called Top Priority Unit One and it has chosen Wolf to be its sole agent. That new agent, codenamed Werewolf, would next undergo intense training. He becomes a highly skilled hand-to-hand fighter, expert marksman, and much more, all while being watched by Thor.
And then he is given the Werewolf suit, full-bodied, "the most complex piece of wearing apparel ever designed". One molecule thick so his body can breath in it but still somehow "impervious to every known chemical and gas" and able to "stop or deflect all but a direct shot from the high caliber rifle, even then the bullet will be rendered nearly harmless". Some other features are also incredulous.
Wolf has been "transformed into the world's most uniquely trained and equipped super-spy".