About
Tim O’Brien is the managing partner of O’Brien Estate Law, LLC in Oak Park, Illinois. His practice focuses on estate planning for families and business owners, with matters involving wills, trusts, guardianship and conservatorship, estate administration, health care directives, and related planning concerns. He works with clients to build plans around their circumstances rather than relying on a one-size-fits-all approach, and he emphasizes reviewing estate plans as family, financial, and business conditions change.
Tim earned a J.D. from the University of Illinois Chicago, where he graduated cum laude and participated in Law Review, Moot Court, and Order of the Coif. He also earned a B.S. in Business Administration from Marquette University and later completed an MBA at Northwestern University. His legal and business education supports estate planning work for individuals, families, and small business owners who need to coordinate personal planning with financial or business succession concerns.
Tim’s professional background includes private practice, service as a research attorney and clerk with the Illinois Appellate Court, and work as an Assistant Attorney General in the Office of the Illinois Attorney General. He later held legal leadership roles before establishing his estate planning practice. This experience gives him a broad perspective on legal analysis, administration, and organizational decision-making, which he applies to planning for family needs, estate administration, and business continuity.
Tim O’Brien brings legal, appellate, government, and business experience to estate planning in Oak Park. He advises clients on creating and maintaining plans intended to protect families, provide for children or other beneficiaries, and prepare for transitions involving personal assets or closely held businesses. His practice emphasizes listening to client goals, explaining the planning process clearly, and developing documents and strategies that can be revisited as circumstances change over time.
Law Office Affiliations
- Attorney, O’Brien Estate Law, LLC
- Member, Illinois State Bar Association
Licensed State
- Illinois
Education
- Northwestern University – Kellogg School of Management|
Master of Business Administration (MBA) - University of Illinois Chicago School of Law
Juris Doctor (JD) - Marquette University
Bachelor of Science
Awards & Badges

- Estate Planning
- Power of Attorney
- Probate
- Trusts
- Wills & Living Wills





