Gillette Stadium has multiple avenues for part-time work. Gillette Stadium and a company called Cushman & Wakefield works within the stadium to facilitate all the daily functions of the stadium operation.
They do not hire from within very heavily, they are good at giving false hope and stringing you along, and for a multi-billion dollar operation, they are one of the cheapest and most disorganized facility I have had the ability to work for.
One of the only good things about the stadium itself, is the people who work within. Only a handful of them are actually hard-working and desirable people with the work ethic that's required.
In closing, if you need a part-time job that can pay a bill or two, this is the place. If you are looking to advance yourself, steer clear.
Entertainment industry, Mostly busy, mindless work
Not paid enough, no benefits, not part of a union as a part-timer, all labor, and cut-throat