Jack Connor is an agent with MITOS.
According to what amounts to a fact sheet given at the beginning of the first recorded adventure:
"The military intelligence, MI6, Her Majesty's Secret Service of the United Kingdom, like other major powers, has recreated its military section MI7, to carry out secret missions against outside rivals. The retired military Brigadier, and the current chief of MI6, Sir Albert Ashley, has established the new MI7 Agency, officially known as MITOS (Military Intelligence for Tactical Operation Strategies) and placed it under indirect control of MI6. In the beginning, in the early years, MITOS formed as part of MI7, which shut down after a short period, due to a budget cut.
This new Agency, Section MI7, formed to work from outside of the UK. to focus on exploring all new frontiers of international threats. As a top-secret agency, operating under the MI6 control, MI7 operated with almost complete autonomy and worked independently of MI6 worldwide through a variety of fictitious agencies around the world.
The headquarters in Lancelot, an isolated remote region near Langley, Virginia, and it housed a few master-spies, who carry out the agency's work - destroying outside threats to Britain. The MITOS agency had been headed from the public for some time.
At least three versions of explanations exist as to why MITOS operations kept secret. Sir Albert Ashley secured Maximilian Anthony Fleming (Max), as the chief of MI7 and the head of MITOS, working side by side. Commander Jack Connor was dedicated to control all MITOS field operations.
Commander Jack Connor's successful operations in the Secret Service were some of the most dangerous missions in the field and he was The Best Man they had. He and Max recruited the MITOS Combat Teams of 20 Field Agents, all are high-ranking Officers, and typically above the rank of Captain. The recruited Agents were from various branches of other British Government Agencies and the Armed Forces. Many of these Agents were former MI6 Agents, but some of them were ordinary civilians.
After three years in Air Force Intelligence, there was not a city in the world Commander Jack Connor did not have connections. Many of the Executives were influential in their own intelligence communities.
Commander Jack Connor joined MI6 at the age of 19. When he was 17 years old, the Air Force Intelligence drafted him. His excellent ability to fill the gaps in investigations, and being a natural leader earned him a legendary reputation among the Secret Service worldwide. Specifically trained to operate aircraft, helicopters, and heavy craft as he had fluently known many languages. He had the natural talent to get a job done. While serving as a Commander in MI7 at Lancelot he was also partaking in many field operations. With Guts and Glory, these are his stories."
That pretty much says it all.