The Firm was founded in 1968 as DeConcini McDonald by Evo DeConcini, Dennis DeConcini and John R. McDonald. Evo DeConcini served as a Justice of the Arizona Supreme Court, Arizona Attorney General, a Pima County Superior Court Judge and a member of the Arizona Board of Regents. Dennis DeConcini, formerly a three-term United States Senator and the Pima County Attorney, now heads the Firm's Washington, D.C. office. John McDonald, who has served as President of the Arizona School Boards Association, is the senior shareholder in the Tucson office. A former senior shareholder in the Phoenix office, Dino DeConcini, accepted a Presidential appointment to serve as the Executive Director of the United States Savings Bond Program. Four of the Firm's attorneys have served as President of the Pima County Bar Association. Others, past and current, serve as judges of trial and appellate level courts, and as adjunct faculty at the University of Arizona College of Law.

The Firm maintains offices in Tucson, Phoenix, Flagstaff and the Washington, D.C. area, and has grown to become one of Southern Arizona's largest law firms. DeConcini McDonald was ranked as one of Arizona's "Top Ten Firms" in Arizona Business Magazine, which polled the general counsels of Arizona's fifteen largest publicly held corporations. According to Arizona Business Magazine, the Firm received the highest possible ranking with respect to its Arizona ties. There was also a consensus among the general counsels that the Firm is a cost-effective supplier of legal services.

The Firm's members are active leaders in Arizona's business and civic affairs. Several of Arizona's landmark buildings are named after members of the DeConcini family, including the Evo DeConcini U.S. Courthouse and Federal Building; the Senator DeConcini Port of Entry, the United States/Mexico border crossing in Nogales, Arizona; and the distinctive DeConcini Building in Tucson, Arizona, which houses not only the Firm, but several other businesses.

The Firm's members participate in numerous pro bono activities, and in 1995, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, and 2007, the Firm received state-wide recognition by the Southern Arizona Legal Aid Volunteer Lawyers Program as "Firm of the Year." Please visit our Community / Pro Bono section to read more on this subject.

The Firm hires attorneys with demonstrated records of academic and professional excellence. Each year at the University of Arizona College of Law commencement, the Firm awards the student achieving the highest academic distinction with the DeConcini McDonald Yetwin & Lacy Academic Achievement Award.

Most senior shareholders have been with the Firm for more than 20 years. This longevity, together with a broad range of practice areas creates both a distinct working atmosphere and an effective problem solving approach to legal practice.