About the Firm
A boutique Illinois workers’ compensation defense firm where every client works directly with a named partner — from first notice through final resolution.
A Different Kind of
Defense Firm
Brennan & Cronin is a Chicago-based workers’ compensation defense firm representing employers and insurers in Illinois. We combine deep individual experience with the power of true partnership, delivering defense strategy that is both meticulous and responsive.
Having an aggressive defense advocate is essential to navigating Illinois workers’ compensation, maximizing results and keeping costs down.
When you retain Brennan & Cronin, you work directly with a defense partner who knows your case, understands your business, and is accountable to your outcome.
Founded on a
Simple Belief
Quinn Brennan spent his career building expertise at one of the country’s largest insurance defense law firms, ultimately founding Brennan Defense Law to offer the same caliber of defense with a client-first philosophy.
Tom Cronin brings over 31 years of Illinois workers’ compensation defense experience to the partnership, where he has built a reputation for decisive advocacy, practical strategy, and consistently strong outcomes for employers and carriers across the state.
Brennan & Cronin was formed on a straightforward belief: every client deserves the best defense available from the beginning of the case through the end.
How We Think and Work
