Preston M. Sullivan Associate Phone 405-602-8098 Email

Preston M. Sullivan Associate

Mr. Sullivan is an associate at Chansolme Harroz Hays who represents individuals and businesses in a broad range of business and commercial matters, including business organization, real estate transactions, commercial litigation, and estate planning.

Mr. Sullivan graduated from Rhodes College in 2015 with a degree in International Business and a minor in Spanish.  Mr. Sullivan went on to graduate with his Juris Doctorate from the University of Oklahoma College of Law.  While in law school Mr. Sullivan was a member of the Phi Delta Phi honor society, received the American Jurisprudence Award in Torts, and was included as a Dean’s List Honoree each semester.

Mr. Sullivan’s work experience includes working as a judicial intern to The Honorable Timothy DeGiusti of the United States District Court for the Western District of Oklahoma and as a legal intern at the United States Attorney’s Office for the Western District of Oklahoma.  Mr. Sullivan is currently admitted to practice law in Oklahoma.

Born and raised in Oklahoma City, Mr. Sullivan is an avid Thunder fan and enjoys spending time with his family.

Practice Areas

Corporate & Transactional

Real Estate

Wealth & Estate Planning

Litigation & Dispute Resolution

Securities & Corporate Finance


Rhodes College (B.A., 2015)

University of Oklahoma (J.D., 2018)


State Bar of Oklahoma (2018)

Professional Organizations

Oklahoma Bar Association

Oklahoma Bar Foundation

Federal Bar Association

Luther Bohanon American Inn of Court XXIIII, former student member

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