About Summit Law Group
Denver law firm founded in 1998 by Michael J. Sullivan. Senior attorney involvement on every case. 25+ years of Colorado practice across six practice areas.
Michael J. Sullivan, JD
Founding Partner
Colorado State Bar — 1997
Super Lawyers Colorado
CO State Bar #CO-29847
Founded on a Different Premise
Michael J. Sullivan founded Summit Law Group in 1998 with a simple but uncommon commitment: every client would have direct access to a senior attorney — not a parade of associates and paralegals — throughout their case.
That commitment has shaped the firm's culture for over 25 years. Our attorneys have handled more than 2,800 cases across practice areas as diverse as multi-vehicle accident reconstructions and complex business acquisitions. The breadth of our experience makes us better at each individual practice.
We serve Denver families and businesses who want straightforward legal advice, realistic expectations, and attorneys who return calls the same day. We're not the biggest firm in Denver. We're the firm where clients feel known.
Whether you're navigating an injury claim, protecting your business, or planning for your family's future, Summit Law Group brings the same senior-level attention to every matter — from the first consultation to final resolution.
Michael J. Sullivan, JD
Michael J. Sullivan, JD
Founding PartnerMichael Sullivan graduated from University of Denver Sturm College of Law in 1997 and has practiced in Colorado exclusively since. He is admitted to the Colorado State Bar (#CO-29847) and the U.S. District Court for the District of Colorado. Michael is recognized by Super Lawyers Colorado in Personal Injury and Business Litigation.
Credentials & Memberships
- ✓ Colorado State Bar — 1997
- ✓ U.S. District Court, D. Colorado
- ✓ Super Lawyers Colorado — Personal Injury & Business Litigation
- ✓ Denver Bar Association — Member
- ✓ Colorado Trial Lawyers Association — Member
What Every Client Can Expect
Senior Attorney on Every Case
You hired a senior attorney. You'll work with a senior attorney — not handed off to a paralegal or first-year associate.
Free Initial Consultation
Every case starts with a confidential consultation at no cost. We'll give you an honest assessment — even if it means referring you elsewhere.
No-Fee PI Cases
Personal injury cases are handled on contingency. We don't get paid unless you do. No upfront costs, no risk to you.
Same-Day Return Calls
We commit to returning all client calls within the same business day. You should never wonder where your case stands.
Colorado-Only Practice
We practice exclusively in Colorado — which means deep knowledge of Colorado courts, judges, and opposing counsel.
25 Years of Local Relationships
Two and a half decades of building relationships with Colorado courts, mediators, and the opposing attorneys who appear regularly in our cases.
Schedule Your Free Consultation
Confidential, no-obligation legal consultation with a senior attorney.