A Little Bit About Us

O'Leary Eaton, PLLC

O'Leary Eaton is committed to providing you with best legal support experience. We approach every client with courtesy and integrity, providing an effective and trustworthy client relationship.

William J. O'Leary

Mr. O'Leary is the founding partner of O’Leary Eaton, PLLC. Mr. O’Leary attended law school at the University of San Diego School of Law, and graduated in 1993. He is admitted to practice law by the State Bar of Arizona and also admitted in the Federal District Court of Arizona. He earned his Bachelor’s of Science degree in Business Administration with majors in Accounting and Finance from the University of Arizona is 1987.

Mr. O’Leary prior to moving to Prescott and forming the law firm O’Leary Eaton, PLLC worked for a law firm in Phoenix, Arizona where he represented corporate clients such as Xerox Corp., McDonald’s Corp., Prime Inc., and State Farm Insurance.

Mr. O’Leary holds an Arizona real estate sales license and conducts various seminars and real estate continuing education classes.

Prior to law school Mr. O’Leary was a Special Agent with the U.S. Department of Treasury-Criminal Investigation Division of the Internal Revenue Service where he investigated federal crimes involving money laundering, securities fraud, and tax fraud.

Mr. O’Leary’s practice areas include, but are not limited to the following:

-Real estate transactions and litigation
-Contracts and entity/corporate formation
-Landlord/tenant matters and evictions
-Administrative law practice
-Estates, trusts, wills and probate proceedings
-Business, construction law and commercial litigation

Michael P. Thieme

Mr. Thieme has been with O’Leary Eaton, P.L.L.C. since 2007. He was admitted to the Arizona state bar in 2005. He is also admitted to the Arizona federal district court, and in addition to his numerous superior court and justice court appearances, he has also appeared in the Arizona bankruptcy courts. While in law school, he was a summer extern for Federal Court Judge Raner Collins in Tucson, Arizona.

Mr. Thieme received his B.A. degree from Princeton University in New Jersey in 1994. In 2000, he moved to Tucson, Arizona and in 2002, he completed his MBA. degree at the University of Arizona Eller School of Business. In 2005, he obtained his Juris Doctor degree at the University of Arizona James E. Rogers College of Law. He is fluent in Polish, and proficient in several European languages.

After law school, Mr. Thieme joined a small Phoenix AV-rated law firm in 2005 where he worked as an associate handling complex civil litigation cases and Chapter 11 business restructurings. He currently works as an associate at the law firm O’Leary Eaton, where his civil law practice includes litigation as well as transactional work, including but not limited to the following areas:

-Landlord/tenant matters and evictions
-Administrative law practice
-Real estate transactions and litigation
-Contracts and entity/corporate formation
-Estates, trusts, wills and probate proceedings
-Business, construction law and commercial litigation

Jay R. Eaton

Jay R. Eaton attended law school at Arizona State University. He focuses on business and tax law along with estate planning. Mr. Eaton is also a certified public accountant and owns and runs The Eaton Group, a local accounting firm.

Dezarai Fisher

Ms. Fisher has been with O’Leary Eaton P.L.L.C. since 2018.  She was admitted to the State Bar of Arizona in 2011.  While in law school, she interned at the Arizona Supreme Court, Staff Attorney’s Office and for the Honorable Cindy K. Jorgenson at the United States Federal District Court in Tucson, Arizona. 
Ms. Fisher received her BA degree from Smith College in Northampton, MA in 2008.  She majored in Spanish and Government, focusing on U.S./Mexico border politics.  In 2008, Ms. Fisher began law school at the University of Illinois Champaign-Urbana on a Rapp Scholarship and received her juris doctorate in 2011. 
After graduation, she returned to Phoenix and became an Assistant City Prosecutor for the City of Phoenix where she handled criminal misdemeanor cases.  She transitioned to criminal defense and started her own practice in 2014.  As a prosecutor and defense attorney Ms. Fisher has done a substantial number of jury and bench trials.  

  • O'Leary Eaton, PLLC

    115 Grove Avenue
    Prescott, AZ 86301


    Call Us
    Main office:: (928) 445-1856
    Fax:: (928) 445-1782

    Mon: 9:00AM-5:00PM
    Tue: 9:00AM-5:00PM
    Wed: 9:00AM-5:00PM
    Thu: 9:00AM-5:00PM
    Fri: 9:00AM-5:00PM
    Sat: Closed
    Sun: Closed

Contact Us