Atty. Daniel Cornelius Sullivan

Atty. Daniel Cornelius Sullivan

Daniel Cornelius Sullivan is a lawyer practicing aviation & aerospace, transportation law, logistic law and 7 other areas of law. Daniel received a A.B. degree from Kansas State University in 1962, and has been licensed for 59 years.

Oak Brook Oak Brook 59 J. Erfahrung 59 year
Call (872) 270-8531 Book Appointment

Profile Summary

About Daniel Cornelius Sullivan at a glance

Daniel Cornelius Sullivan is a Partner based in Oak Brook, Illinois, practicing at Law Offices of Sullivan Hincks & Conway. They have 59+ years of legal experience, licensed to practice since 1967. Their practice focuses on business, real estate, commercial re, litigation, and government. Admitted to practice in Kansas (1967), U.S. Supreme Court and U.S. District Court, District of Kansas (1967), Illinois (1970), and U.S. Supreme Court (1970). Educated at Washburn University of Topeka (J.D., 1967) and Kansas State University (A.B., 1962). Active member of Illinois State Bar Association Transportation Lawyers Association Association of Transportation Law Professional. Serands clients in Oak Brook, IL and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

Über uns

  • Daniel Cornelius Sullivan is a lawyer practicing aviation & aerospace, transportation law, logistic law and 7 other areas of law
  • Daniel received a A.B. degree from Kansas State University in 1962, and has been licensed for 59 years
  • Daniel practices at Law Offices of Sullivan Hincks & Conway in Oak Brook, IL

Practice Areas Explained

Daniel Cornelius Sullivan's Areas of Practice

Each practice area below reflects the types of cases Daniel Cornelius Sullivan handles, with a brief overview of what that area of law covers.

Business & Corporate Law

Business attorneys advise founders and growing companies on entity formation, contracts, financing, M&A, and dispute resolution.

Daniel Cornelius Sullivan is one of 501,317 business attorneys indexed nationally. Browse business attorneys in Illinois →

Real Estate Law

Real estate attorneys handle home purchases, sales, commercial transactions, title disputes, and landlord-tenant matters.

Daniel Cornelius Sullivan is one of 316,149 real estate attorneys indexed nationally. Browse real estate attorneys in Illinois →

Commercial Real Estate

Daniel Cornelius Sullivan is one of 16,000 commercial re attorneys indexed nationally. Browse commercial re attorneys in Illinois →

Civil Litigation

Civil litigation attorneys for breach of contract, business disputes, civil rights, and class action lawsuits.

Daniel Cornelius Sullivan is one of 454,532 litigation attorneys indexed nationally. Browse litigation attorneys in Illinois →

Government & Administrative Law

Attorneys for administrative law, agency hearings, government contracts, licensing, and public benefits.

Daniel Cornelius Sullivan is one of 132,225 government attorneys indexed nationally. Browse government 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 Oak Brook 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 Oak Brook or all attorneys in Illinois.

Frequently Asked

Common questions about Daniel Cornelius Sullivan

Where is Daniel Cornelius Sullivan's law office located?
Daniel Cornelius Sullivan's law practice is located in Oak Brook, Illinois. The firm is Law Offices of Sullivan Hincks & Conway. You can contact the office directly through this profile page.
What practice areas does Daniel Cornelius Sullivan handle?
Daniel Cornelius Sullivan focuses on business, real estate, commercial re, litigation, government. Each practice area listed reflects experience handling cases of that type in Illinois.
How long has Daniel Cornelius Sullivan practiced law?
Daniel Cornelius Sullivan has 59+ years of legal experience and has been licensed since 1967.
Where did Daniel Cornelius Sullivan go to law school?
Daniel Cornelius Sullivan earned their education at (J.D., 1967); (A.B., 1962).
How can I contact Daniel Cornelius Sullivan for a consultation?
You can contact Daniel Cornelius Sullivan 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.
Washburn University of Topeka
- 1967
A.B.
Kansas State University
- 1962

Bar Admissions

Kansas
Admitted: 1967
U.S. Supreme Court and U.S. District Court, District of Kansas
Admitted: 1967
Illinois
Admitted: 1970
U.S. Supreme Court
Admitted: 1970
U.S. Supreme Court U.S. District Court, Northern District of Illinois U.S. District Court, Central D
Admitted: 1978
U.S. Court of Federal Claims
Admitted: 2003

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