Atty. Derek Matthew Barker

Atty. Derek Matthew Barker

Derek Matthew Barker is a lawyer practicing criminal defense, dui & dwi, transportation liability and 1 other area of law. Derek received a B.S. degree from Loyola University at Chicago in 1987, and has been licensed for 35 years.

Naperville Naperville 35 yrs experience 35 year
Call (224) 524-3129 Book Appointment

Profile Summary

About Derek Matthew Barker at a glance

Derek Matthew Barker is a Partner based in Naperville, Illinois, practicing at Schwartz Gilligan, LTD.. They have 35+ years of legal experience, licensed to practice since 1991. Their practice focuses on dui/dwi and criminal defense. Admitted to practice in Illinois (1991) and U.S. District Court, Northern District of Illinois (1991). Educated at John Marshall Law School (J.D., 1991) and Loyola University at Chicago (B.S., 1987). Active member of Chicago and American Bar Associations. Serands clients in Naperville, IL and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • Derek Matthew Barker is a lawyer practicing criminal defense, dui & dwi, transportation liability and 1 other area of law
  • Derek received a B.S. degree from Loyola University at Chicago in 1987, and has been licensed for 35 years
  • Derek practices at Schwartz Gilligan, LTD. in Naperville, IL

Practice Areas Explained

Derek Matthew Barker's Areas of Practice

Each practice area below reflects the types of cases Derek Matthew Barker handles, with a brief overview of what that area of law covers.

DUI / DWI Defense

Find experienced DUI and DWI defense attorneys near you. Compare verified profiles, read client reviews, and consult about your case for free.

Derek Matthew Barker is one of 29,977 dui/dwi attorneys indexed nationally. Browse dui/dwi attorneys in Illinois →

Criminal Defense

A criminal defense attorney protects your rights from arrest through trial. Find experienced lawyers handling DUI, drug, federal, theft, and violent-crime charges.

Derek Matthew Barker is one of 214,271 criminal defense attorneys indexed nationally. Browse criminal defense attorneys in Illinois →

Jurisdictional Context

Why local counsel matters in Illinois

Practicing law in Illinois. Legal matters in Illinois are governed by state-specific rules of civil and criminal procedure, statutes of limitations, and substantive law. Cases originating in Naperville are typically filed in the local municipal court or the appropriate Illinois state district court, depending on subject matter and amount in controversy. An attorney licensed in Illinois brings working knowledge of local procedural deadlines, judicial practices in this andnue, and the substantive law that applies to cases brought here. Out-of-state attorneys generally cannot represent clients in Illinois courts without local counsel or pro hac vice admission.

Looking for additional Illinois attorneys? Browse all attorneys in Naperville or all attorneys in Illinois.

Frequently Asked

Common questions about Derek Matthew Barker

Where is Derek Matthew Barker's law office located?
Derek Matthew Barker's law practice is located in Naperville, Illinois. The firm is Schwartz Gilligan, LTD.. You can contact the office directly through this profile page.
What practice areas does Derek Matthew Barker handle?
Derek Matthew Barker focuses on dui/dwi, criminal defense. Each practice area listed reflects experience handling cases of that type in Illinois.
How long has Derek Matthew Barker practiced law?
Derek Matthew Barker has 35+ years of legal experience and has been licensed since 1991.
Where did Derek Matthew Barker go to law school?
Derek Matthew Barker earned their education at (J.D., 1991); (B.S., 1987).
How can I contact Derek Matthew Barker for a consultation?
You can contact Derek Matthew Barker directly through this profile page. Click "Ask the Attorney" to submit a question, or "Schedule a Consultation" to book a meeting. Most claimed-profile attorneys respond within one business day.

Education

J.D.
John Marshall Law School
- 1991
B.S.
Loyola University at Chicago
- 1987

Bar Admissions

Illinois
Admitted: 1991
U.S. District Court, Northern District of Illinois
Admitted: 1991

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