Learn English – noun for “someone who has access”

I'm afraid that there isn't a single word meaning our company as opposed to another company in English. If it's too confusing to use just plain company, then you may have to come up with some form of us, this company, our company, etc. on the one hand, and affiliate or associate companies (or client, if that's applicable) for the companies "our company" is working with.

For someone with money, "wealthy" is the obvious answer (and connotes various kinds of abundance).

For someone with social resources, "influential" or "well-connected." If you want to suggest that they don't often use these resources, but that people would do things for them if they asked, you might need a more specific term describing the nature of their standing, such as "respected," "popular," or "well-loved." If it's just because they're powerful, then maybe "powerful" or "important."

For someone with intellectual resources, a person who knows a lot of things might be "knowledgeable" or "widely-read," or they might be "a polymath," a "jack-of-all-trades," or a "renaissance man/woman." Or they could be "clever." "Clever" is sometimes used as a subtle insult (or as conspicuously faint praise) to refer to someone who has intelligence or problem-solving skills but uses them for trivial things.