Otto S. Shill III

Otto S. Shill III Member

P: 602.262.5956
F: 602.495.2698
L: Phoenix

For more than 30 years, Mr. Shill has helped businesses and business owners comply with government regulations, navigate government investigations, and build wealth through business transactions and long-term planning. He has significant experience in federal and state tax compliance and tax controversies; compensation, benefits, and employment regulation; and government contracting compliance and disputes. 

Mr. Shill regularly represents clients before federal and state government agencies, including the Internal Revenue Service (IRS), the Equal Employment Opportunity Commission (EEOC), U.S. Department of Labor (DOL), the National Labor Relations Board (NLRB), Arizona Attorney General's office, Arizona Industrial Commission, Arizona Department of Revenue and other Arizona regulatory boards. Mr. Shill also drafts and lobbies for the passage of legislation to address client issues.

The Arizona Board of Legal Specialization designates Mr. Shill as a Certified Tax Specialist.

Areas of Focus

  • Tax, Business Transactions, and Compliance
  • Labor and Employment Law
  • Business and Wealth Succession Planning
  • Government Contracting

Articles and Publications


  • Author, “Taxation Issues in Employment Settlement Awards,” Arizona Employment Law Handbook, Second Edition, Vol. 2, (2007; revised 2013)

  • Author, “Fair Labor Standards Act,” Arizona Employment Law Handbook, Second Edition, Vol. 2, (revised 2016)

  • Author, “Negligent Hiring and Supervision,” Arizona Employment Law Handbook, Second Edition, Vol. 2, (revised 2016)

  • Editorial Board, Arizona Employment Law Handbook, Second Edition, Vol. 2, (revised 2016)

Digital Media

Professional Affiliations

  • American Bar Association
    Section of Taxation, Employee Benefits and Executive Compensation Subcommittee, Member
    Section of Labor and Employment, Member
    Section of Public Contract Law, Member
  • State Bar of Arizona
    Labor and Employment Law Section, Member
    Tax Law Section, Member
  • Board Member, East Valley Adult Resources Foundation
  • President Elect, Mesa Rotary Club
  • Volunteer, AOPA Airport Support Network
  • Choir Member, Millennial Choirs and Orchestras
  • Mesa Chamber of Commerce
    Government Affairs Committee, Chair, 2009 - 2015
    Board of Directors, Chair, 2012
  • Member, City of Mesa Falcon Field Area Visioning Commission (2014-2015)
  • Chair, East Valley Aviation and Aerospace Alliance (2011-2013)
  • Member, City of Mesa Central Main Street Neighborhood Area Planning Committee (2011)

Admitted to Practice

  • Texas, 1991
  • Arizona, 1985

Court Admission

  • U.S. Supreme Court
  • U.S. District Court, District of Arizona
  • U.S. Tax Court
  • Arizona State Courts


  • LL.M., Boston University School of Law, Taxation, 1987
    Author and Editor, Journal of Tax Law
  • J.D., Brigham Young University, J. Reuben Clark Law School, 1985
  • B.S., Brigham Young University, Accounting, 1982