Atty. David Gilbert O'Leary

Atty. David Gilbert O'Leary

David Gilbert O'Leary is a lawyer practicing estate planning, mergers and acquisitions, erisa, employee benefits and executive compensation and 6 other areas of law. David received a B.S. degree from University of Illinois in 1970, and has been licensed for 48 years.

Chicago Chicago 48 yrs experience 48 year
Call (309) 903-9178 Book Appointment

Profile Summary

About David Gilbert O'Leary at a glance

David Gilbert O'Leary is a Senior Counsel based in Chicago, Illinois, practicing at Holland & Knight LLP. They have 48+ years of legal experience, licensed to practice since 1978. Their practice focuses on estate planning, employment, business, tax, and m&a. Admitted to practice in Illinois (1978) and Florida U.S. District Court, Northern District of Illinois and U.S. Tax Court (1979). Educated at Loyola University Chicago School of Law (J.D., 1978) and University of Illinois (B.S. Finance, 1970). Recognitions include Peer Reviewed. Active member of Chicago and American Bar Associations The Florida Bar American Institute of Certified Public Accountants. Serands clients in Chicago, IL and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • David Gilbert O'Leary is a lawyer practicing estate planning, mergers and acquisitions, erisa, employee benefits and executive compensation and 6 other areas of law
  • David received a B.S. degree from University of Illinois in 1970, and has been licensed for 48 years
  • David practices at Holland & Knight LLP in Chicago, IL

Practice Areas Explained

David Gilbert O'Leary's Areas of Practice

Each practice area below reflects the types of cases David Gilbert O'Leary handles, with a brief overview of what that area of law covers.

Estate Planning & Probate

An estate planning attorney prepares wills, trusts, powers of attorney, and healthcare directives to protect your family and pass on your assets.

David Gilbert O'Leary is one of 226,536 estate planning attorneys indexed nationally. Browse estate planning attorneys in Illinois →

Employment Law

Employment lawyers represent workers in wrongful termination, discrimination, harassment, wage & hour disputes, and severance negotiations.

David Gilbert O'Leary is one of 169,120 employment attorneys indexed nationally. Browse employment attorneys in Illinois →

Business & Corporate Law

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

David Gilbert O'Leary is one of 501,317 business attorneys indexed nationally. Browse business attorneys in Illinois →

Tax Law

Tax attorneys handle IRS audits, tax debt, international tax, estate planning, and tax court litigation.

David Gilbert O'Leary is one of 85,302 tax attorneys indexed nationally. Browse tax attorneys in Illinois →

Mergers & Acquisitions

David Gilbert O'Leary is one of 49,731 m&a attorneys indexed nationally. Browse m&a 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 Chicago 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 Chicago or all attorneys in Illinois.

Frequently Asked

Common questions about David Gilbert O'Leary

Where is David Gilbert O'Leary's law office located?
David Gilbert O'Leary's law practice is located in Chicago, Illinois. The firm is Holland & Knight LLP. You can contact the office directly through this profile page.
What practice areas does David Gilbert O'Leary handle?
David Gilbert O'Leary focuses on estate planning, employment, business, tax, m&a. Each practice area listed reflects experience handling cases of that type in Illinois.
How long has David Gilbert O'Leary practiced law?
David Gilbert O'Leary has 48+ years of legal experience and has been licensed since 1978.
Where did David Gilbert O'Leary go to law school?
David Gilbert O'Leary earned their education at (J.D., 1978); (B.S. Finance, 1970).
How can I contact David Gilbert O'Leary for a consultation?
You can contact David Gilbert O'Leary 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.
What awards or recognition has David Gilbert O'Leary received?
David Gilbert O'Leary's notable recognition includes: Peer Reviewed.

Education

J.D.
Loyola University Chicago School of Law
- 1978
B.S. Finance
University of Illinois
- 1970

Awards

Peer Reviewed

Bar Admissions

Illinois
Admitted: 1978
Florida U.S. District Court, Northern District of Illinois and U.S. Tax Court
Admitted: 1979

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