Atty. David L. Wallis

Atty. David L. Wallis

David practices in the area of environmental and natural resources law, focusing on environmental compliance auditing, Superfund, solid and hazardous waste, asbestos, water quality, underground storage tank, environmental management systems, environmental remediation and environmental due diligence matters. He has conducted over 120 comprehensive environmental audits throughout the United States and internationally over the past eight years.

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Profile Summary

About David L. Wallis at a glance

David L. Wallis is a litigation and environmental attorney based in Phoenix, Arizona, practicing at Gallagher & Kennedy PA. Admitted to practice in Arizona, State Bar of Arizona and Utah, Utah State Bar. Educated at Brigham Young University (J.D., 1988) and Brigham Young University (—, 1988). Recognitions include Best Lawyers in America — Environmental Law (2026), Best Lawyers in America — Litigation - Environmental (2026), and Best Lawyers in America — Additional Areas of Practice: (2026). Serands clients in Phoenix, AZ and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

David practices in the area of environmental and natural resources law, focusing on environmental compliance auditing, Superfund, solid and hazardous waste, asbestos, water quality, underground storage tank, environmental management systems, environmental remediation and environmental due diligence matters. He has conducted over 120 comprehensive environmental audits throughout the United States and internationally over the past eight years. He was recently named among the 2013 Best Lawyers in America, and also a BTI Client Service All-Star for 2013 by the Wellesley, Mass. based firm, BTI Consulting Group, Inc.

Representative Experience

  • Conducting over 120 comprehensive environmental compliance audits in 30 states, Brazil, Canada and Venezuela during the past eight years.
  • Representing clients on over 250 Real Estate Environmental Site Assessments.
  • Participating in the development of environmental legislation and regulations in four states and on the federal level. From 1995-2000, Mr. Wallis was the primary author of the Arizona Solid Waste Statute and amendments to Arizona’s Hazardous Waste, Special Waste, Used Oil and Waste Tire Statutes.
  • Representing clients in over 18 cost recovery actions under Superfund, solid waste and underground storage tank laws.
  • Successfully obtaining government agency closure of contaminated sites in Arizona, California, New Mexico, Texas and Washington.
  • Serving as Newsletter Editor (1994-96) and Executive Council Member (1996-2001) of the Environmental and Natural Resources Law Section of the State Bar of Arizona; Chairman of the Arizona Chamber of Commerce Solid and Hazardous Waste Subcommittee (1997-present); Chairman of the Arizona Solid Waste Coalition (1995-present); member, Maricopa Association of Governments Solid Waste Advisory Committee (1998-present); and Visiting Instructor on environmental law at Arizona State University (1989-present).

    Practice Areas Explained

    David L. Wallis's Areas of Practice

    Each practice area below reflects the types of cases David L. Wallis handles, with a brief overview of what that area of law covers.

    Civil Litigation

    Civil litigation attorneys for breach of contract, business disputes, civil rights, and class action lawsuits.

    David L. Wallis is one of 454,532 litigation attorneys indexed nationally. Browse litigation attorneys in Arizona →

    Environmental Law

    Environmental attorneys for regulatory compliance, contamination, land use, and natural resource law.

    David L. Wallis is one of 56,434 environmental attorneys indexed nationally. Browse environmental attorneys in Arizona →

    Jurisdictional Context

    Why local counsel matters in Arizona

    Practicing law in Arizona. Legal matters in Arizona are governed by state-specific rules of civil and criminal procedure, statutes of limitations, and substantive law. Cases originating in Phoenix are typically filed in the local municipal court or the appropriate Arizona state district court, depending on subject matter and amount in controversy. An attorney licensed in Arizona brings working knowledge of local procedural deadlines, judicial practices in this andnue, and the substantive law that applies to cases brought here. Out-of-state attorneys generally cannot represent clients in Arizona courts without local counsel or pro hac vice admission.

    Looking for additional Arizona attorneys? Browse all attorneys in Phoenix or all attorneys in Arizona.

    Frequently Asked

    Common questions about David L. Wallis

    Where is David L. Wallis's law office located?
    David L. Wallis's law practice is located in Phoenix, Arizona. The firm is Gallagher & Kennedy PA. You can contact the office directly through this profile page.
    What practice areas does David L. Wallis handle?
    David L. Wallis focuses on litigation, environmental. Each practice area listed reflects experience handling cases of that type in Arizona.
    Where did David L. Wallis go to law school?
    David L. Wallis earned their education at (J.D., 1988); (—, 1988); (BA, 1985).
    How can I contact David L. Wallis for a consultation?
    You can contact David L. Wallis directly through this profile page. Click "Ask the Attorney" to submit a question, or "Schedule a Consultation" to book a meeting. Most claimed-profile attorneys respond within one business day.
    What awards or recognition has David L. Wallis received?
    David L. Wallis's notable recognition includes: Best Lawyers in America — Environmental Law; Best Lawyers in America — Litigation - Environmental; Best Lawyers in America — Additional Areas of Practice:; Best Lawyers in America — Natural Resources Law; Best Lawyers in America — Oil and Gas Law.

    Education

    J.D.
    Brigham Young University
    - 1988
    Brigham Young University
    - 1988
    BA
    Brigham Young University
    - 1985

    Awards

    Best Lawyers in America — Environmental Law
    - 2026
    Best Lawyers in America — Litigation - Environmental
    - 2026
    Best Lawyers in America — Additional Areas of Practice:
    - 2026
    Best Lawyers in America — Natural Resources Law
    - 2026
    Best Lawyers in America — Oil and Gas Law
    - 2026
    Best Lawyers in America — Special Focus:
    - 2026
    Best Lawyers in America — Environmental Cleanup
    - 2026
    Best Lawyers in America — RCRA/Hazardous Waste
    - 2026
    Best Lawyers in America — Real Estate
    - 2026
    Best Lawyers in America — Solid Waste
    - 2026
    Best Lawyers in America — Superfunds/Environmental Remediation
    - 2026
    Best Lawyers in America — Waste
    - 2026

    Bar Admissions

    Arizona, State Bar of Arizona
    Utah, Utah State Bar

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