My question involves labor and employment law for the state of: Massachusetts(federal question in addition)

My brother has recently graduated and found himself in a bad situation with a company. Graduating with a simple degree in biology he got a job as a "lab tech"(he builds plastic structures all day with plastic weld) At first it was through a temp hiring agency, they had him work strictly 40 hours and rarely had him go over as it was hourly, then offered him a "pay raise" and move to salary after 6 months which he accepted. Unfortunately now they pressure him almost at threat of losing job to work long hours on top of a long commute into boston daily(i know commute doesnt factor but actual hours worked are at least 50-60 every week) and he does not get paid overtime. His salary only works out to about 20/hr at 40 hours, and was being paid 16/hr while through temp company, but now after working 60hrs a week it actually works out to around only 13/hr

Is there anything he can do other than quit and find a new job?
FLSA exempts "proffesional" workers i assume this is what the company is relying on?

Mass general law chapter 152 section 1a exempts something fairly similair to the flsa as exempt:
"as a bona fide executive, or administrative or professional person or qualified trainee for such position earning more than eighty dollars per week. "

My direct interpretation of these is that he is screwed just for holding a college degree he is now a "professional" and can be forced to work as many hours as the company wants and if he doesn't like it he can quit? this doesn't seem right nor in the spirit of the flsa thus i am posting here asking if this truly is the case