I could get by on two I did this at Gen-Con in a pick-up you would be a elite triad, they are in my game think of black ops people they do the high risk missions and are broadly trained you must have a military cliche' and a second cliche of a science or cultural nature.
A required cliche will be Special Forces Unit Member [Combat Expert, First Aid, Use Military Field Technology, *One Elective Area*] since everyone has either active special ops training or extensive SG Team experience so are good warriors. In simple terms everyone can fire weapons, knows martial arts, can sneak and ambush, pathch people up use fairly advanced technology and do something specific like Field Medicine, Demolitions, Pilot, Sniper or something else. All have some relevant science training or something. A last cliche would be open but likely fit the best-of-the-best model so could be an athletic area, or an advanced degree or a veteran soldier or another military area.
They are formerly attached to the Stargate Military Arm and can expect the toughest assignments. They are called Stargate Special Ops or SSO's. And must have a small number of specialists from 2-4 (average is 3).