Marc Dane is an agent with MI-6.
At least he is when we first meet him. Things will change over time which is not uncommon but in the first recorded adventure, he is firmly in the field with several harden operatives. He is in their team having gotten the training and issued the gear but in his mind and his heart he is still the computer jockey he had been before.
Dane is in his late thirties though with his somewhat boyish face and an seemingly perpetually unruly head of "dishwater blond hair", he could easily pass for someone a lot younger. He has been a member of Operations Team Seven for almost two years but with a lot of that time having been in training, his number of missions is low and he has found to his annoyance that the pre-op jitters still find him. "...every time he thought that the next time he would be free of the unease. But it hadn't happened yet, and the corner of his lip pulled up in a crooked smile as he considered that it probably never would".
The Operations team he belonged to, codenamed "Nomad", was one of ten "rapid-reaction units run under the covert aegis of the British Secret Intelligence Service". He had been snatched up quickly after his time with the Royal Navy's Fleet Air Arm had come to an end.
Despite being issued a sidearm and having had quite sufficient training in its use, Dane prefers to leave it behind, thinking that "carrying the pistol on a mission always made Marc feel as if he was inviting trouble". Therein lay the difference between the "blokes in the van" and the "blokes with the guns". Despite having been offered a chance to become a true field operative, one of those with the guns, Dane had passed. "All this time afterward, and still he wasn't sure what had stopped him. He had said no, chosen to play it safe and not to take the risk."
Safety is not something that Dane truly sought though and it most definitely is not anything close to what he would find.