Fighting for injured people across Chicagoland and Illinois. Persistent. Zealous. Respected.
Jason A. Marker, J.D. — Naperville native, former insurance defense attorney, and 25+ years spent representing injured people and their families.
He Knows How Insurance Companies Think — Because He Once Worked for Them
Jason Marker grew up in Naperville. After law school at the University of Illinois Chicago, he began his career on the defense side — representing insurance carriers. He was good at it. But he walked away because he saw firsthand how insurance companies systematically undervalue real people's real injuries.
He founded Marker Law to do things differently: a firm that puts clients first, communicates clearly, and applies maximum pressure where it matters — in negotiations and in the courtroom.
"I wanted to practice injury law in a different way with the utmost integrity and honesty. My desire was to have a firm where we put people first and provide clients with superior communication, compassion, but also aggressively pushed for maximum outcomes." — Jason A. Marker
Education, Bar & Associations
- Illinois bar admitted 2000
- UIC School of Law (formerly The John Marshall Law School), 2000
- Naperville Central High School alumnus
- Illinois Trial Lawyers Association member
- Illinois State Bar Association member
- DuPage County Bar Association member
- Will County Bar Association member — Past Chairman of the Civil Committee, 2010 to 2013
Awards & Recognition
- AV Preeminent — Martindale-Hubbell's highest peer rating, certified 2023
- Super Lawyers — selected every year since 2013
- Top 100 National Trial Lawyers
- Best of Naperville — 2024 nominee
- Expertise.com (backed by Forbes) — Best Car Accident Lawyer 2025 for Downers Grove, Plainfield, Wheaton and Oswego
Get to Know the Marker Law Team
Two trial attorneys and an experienced bilingual support team, all working your case together.
Meet Our Attorneys
Jason A. Marker and Dan McLean — two Naperville-raised trial lawyers with insider experience from the insurance side of the table.
Meet Our AttorneysMeet Our Staff
Marisol Castillo, Liz Ruiz and Dalila Andrade — our bilingual paralegals and staff, with decades of combined injury-law experience guiding clients through every step.
Meet Our StaffNine Reasons Injured Illinoisans Pick Marker Law
The homepage only hints at it — this is the long answer. Real differentiators, in plain language, with the receipts.
Former insurance defense attorney
Jason spent his first years of practice defending insurance carriers. He knows the playbook — adjuster tactics, reserve setting, low-ball anchoring — and uses it against them on your side.
Our attorneys answer calls personally
No phone-tag, no call center. A Marker Law attorney is the one returning your call — at every stage of the case.
Independent medical referral network
Trusted Chicagoland providers Marker Law attorneys have worked with for years — chosen by your treatment needs, never by an insurance carrier.
Bilingual representation — English & Spanish
Native-fluent Spanish-speaking team members work every case so Spanish-speaking clients get the same full representation, not a translated summary.
Available 24/7
Crashes don't keep business hours. Phones answered nights, weekends, holidays — and if you can't come to us after a serious injury, we come to you.
Contingency — no recovery, no fee
You pay nothing up front and nothing at all unless we recover money for you. Free consultation, free case review, fee comes out of the settlement.
Lifelong Naperville insider
Naperville-born, Naperville Central alum, still here. Jason knows the DuPage and Will County courts, the local adjusters, and the community his clients come from.
AV Preeminent · Super Lawyers · National Top 100 · ITLA
AV Preeminent rating from Martindale-Hubbell, named to Illinois Super Lawyers every year since 2013, Top 100 National Trial Lawyers, Illinois Trial Lawyers Association member.
Tried in court — not just settled
Marker Law attorneys have taken cases to verdict in Illinois courts. That credible threat of trial is what moves carriers off their first number — and you only get it from lawyers who actually go there.
A Record of Excellence & Client Appreciation
Peer recognition, independent ratings, and community trust built over 25 years of advocacy.
AV Preeminent Rated
The highest possible peer rating from Martindale-Hubbell, awarded for legal ability and professional ethics — certified in 2023.
Super Lawyers Since 2013
Named to Illinois Super Lawyers every year since 2013 — a designation earned by fewer than 5% of attorneys statewide.
National Top 100 Lawyers
Selected to the National Top 100 Trial Lawyers, recognizing outstanding plaintiff attorneys across the country.
5.0 Google Rating
A perfect 5.0-star rating across 75 five-star client Google reviews. Real feedback from real people Marker Law has helped.
Best of Naperville 2024
Nominated for Best of Naperville 2024 — a reflection of the community trust Jason Marker has built over two and a half decades.
Bilingual Team
Marker Law serves clients in English and Spanish. Every member of our team is committed to clear communication in the language you are most comfortable with.
Named a Best Car Accident Lawyer for 2025 by Expertise.com — backed by Forbes — in Downers Grove, Plainfield, Wheaton and Oswego.
"Jason and his assistants answered every single call I made, even when I thought I was being a pest. I never had a disability payment not come on time in four years."
Michael Garvin — Client
Frequently Asked Questions
Straightforward answers to the questions Marker Law clients ask most often about this topic.
We Care & Want to Listen. It’s FREE.
Tell us what happened. We want to help, and there is never a fee for a consult with us.