American University

B.A., International Relations and Law & Society, 1985
  • with honors

Arizona State University

J.D., 1989

Bar Admission



District of Columbia

J. Gregory Cahill



Mr. Cahill’s practice focuses primarily on complex construction litigation and support for residential and commercial developers and contractors. Mr. Cahill also practices in the areas of insurance litigation and coverage and commercial litigation. He represents builders and developers throughout Arizona, New Mexico, and California, including in State and Federal Court and in front of various administrative tribunals and regulatory bodies. Mr. Cahill previously practiced in the areas of personal injury and uninsured/underinsured motorist litigation.

Prepared materials for and spoken as a panelist for various seminars concerning contract formation, construction law, construction defect litigation, lien law, insurance coverage, alternative dispute resolution, and ethics.

Mr. Cahill is licensed to practice in the state courts of Arizona, California, and the District of Columbia. He is also admitted to practice in the United States District Court for the District of Arizona and the United States District Courts for the Northern, Eastern, Central and Southern Districts of California.

Professional Involvement

  • State Bar of Arizona, Member, Construction Law Section 
  • State Bar of California
  • State Bar of the District of Columbia
  • Maricopa County Bar, Construction Law Section, previous Section Vice Chair; Section Board Member
  • Arizona Builders Alliance, Legislative Committee, Community Service Board


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Areas of Practice


  • Listed in Best Lawyers in America, Construction Law and Litigation - Construction (2013 - present)
  • Best of Arizona, Ranking Arizona
  • Martindale-Hubbell™ AV rated
  • The Best of Arizona Business 2010
  • Top Lawyers, AZ Business Magazine, July 2009