Ohhhhh ok. I understand now thank you for clearing that up for me
Well I'm not sure it really answers your question, but it's a start.
And I'm not leadership myself so this is just from my perspective, not any inside knowledge... but the Master Instructors have been with StrongFirst since the beginning of the organization, and even before that, with the preceding organization. They have countless hours teaching StrongFirst principles, leading teams, and participating in moving the organization forward. I've had the honor to learn from 8 of them in person myself at various certification events, and they are all absolutely top notch instructors with an incredible wealth of knowledge!
The Seniors (I've been taught by 5 of the, as well) are equally dedicated and skilled but perhaps not so long, or quite so involved, as the Masters. I'm not sure if there's a different level of participation within the organization.
The Team Leaders (of whom I have met 11) have been selected from Instructor ranks to the leadership position to lead teams at certification events and teach the workshops.
Instructors (SFG I/II, SFL, SFB, and Elite) have earned certification and teach StrongFirst principles in whatever setting they choose to. There's no ongoing involvement required other recertification requirements to keep the cert current, but there is a special area here on the forum for certified instructors, a special area on the web page, and instructors are welcome to write articles or otherwise stay involved. For those who want to "move up" to Team Leader and beyond, the first step is usually to apply to assist at a certification event.