William H. Walsh



(206) 224-1296

(206) 621-8783

Bill is a highly experienced trial lawyer who concentrates his practice on a variety of business litigation matters with a broad emphasis on transactional litigation, employment disputes, professional responsibility, product liability and class action defense. Bill has also successfully represented a substantial number of corporate and individual clients in a range of other complex areas including matters involving securities litigation, medical device liability, personal injury, medical malpractice, environmental tort, maritime and admiralty, disability, aircraft accidents, eminent domain, real property disputes, and employment discrimination. Bill is also co-chair of Cozen O’Connor’s Aviation Industry team.

Bill serves as disciplinary counsel for the Washington State Commission on Judicial Conduct. He is AV-rated (highest rating) by Martindale-Hubbell and has been selected by his peers as a Top 100 Washington Super Lawyer multiple times and has been perennially chosen as a Washington Super Lawyer since 2003.

Prior to joining private practice, Bill served as a special assistant U.S. Attorney and Air Force Judge Advocate, prosecuting civilian and military criminal matters as well as defending the federal government in employment discrimination cases.

Bill was a member of the 1984 University of Washington football team that won the 1985 Orange Bowl and was inducted in to the Husky Hall of Fame in 2016.

Bill earned his J.D., cum laude, from Gonzaga University School of Law. He received his bachelor's degree from the University of Washington.



Five Cozen O’Connor Attorneys Named to 2021 Washington Super Lawyers List

July 20, 2021

Super Lawyers has named five Cozen O’Connor attorneys to its 2021 list of top practitioners in Washington.

Five Cozen O’Connor Attorneys Named to 2020 Washington Super Lawyers List

July 17, 2020

Super Lawyers has named five Cozen O’Connor attorneys to its 2020 list of top practitioners in Washington.

US Regulator Grants Exemption for Drone Flight During Lockdown [Financial Times]

April 22, 2020

Bill Walsh was quoted in an article in the Financial Times titled, "US Regulator Grants Exemption for Drone Flight During Lockdown." This article discusses a new coronavirus-related waiver for drone flight which allows an oil and gas company in Houston, TX to use unmanned aircraft instead of humans to inspect its facilities while the staff remains in lockdown.

Six Cozen O’Connor Attorneys Named to 2019 Washington Super Lawyers List

June 12, 2019

Super Lawyers has named six attorneys at Cozen O’Connor to its 2019 lists of top practitioners in Washington.

Cozen O’Connor Names Six New Shareholders

September 07, 2017

Cozen O’Connor is proud to announce the promotion of six members to shareholders of the firm: David Brisco (San Diego), Michael de Leeuw (New York), John Dickenson (West Palm Beach), Jonathan Lichtenstein (Philadelphia), William Walsh (Seattle), and Ingrid Welch (Philadelphia).

Microsoft Makes VR Drone Fight Simulator Available on GitHub

February 21, 2017

William Walsh discusses drones and the need for training and safety testing in LinuxInsider.

William Walsh Discusses the Risks of Drones During the Holiday Buying Season in Business Insurance

December 06, 2015

Drone sales that could top 1 million this holiday season have lawyers warming up for a wave of claims, with differing views on the insurance industry's readiness for the risks that commercial and consumer drone operators will bring.

Cozen O’Connor Continues to Grow West Coast Presence with Addition of William Walsh

March 31, 2014

Cozen O’Connor has hired experienced commercial litigator William Walsh as a member, further expanding the firm’s litigation strengths in its Seattle office. Mr. Walsh has successfully represented numerous clients in court in a variety of areas, particularly with regard to aviation, products liability, and professional liability matters.


The Efficacy of Preemption Defenses in Airline COVID-19 Litigation [Alert]

July 27, 2020

William H. Walsh and Anusha E. Jones discuss potential preemption defenses that could be available to airlines and their potential effectiveness.

Unmanned Underwater Vehicles Have Role in Pipeline Security

December 31, 2019

Anusha Jones and Bill Walsh contributed an article to the Pipeline & Gas Journal discussing how the General Accounting Office (GAO) published its findings related to Critical Infrastructure Protection in a Congressional report entitled “Key Pipeline Security Documents Need to Reflect Current Operating Environment.”

Space Regulations: To Boldly Go … Or Lightly Tread

February 06, 2019

Bill Walsh discusses why reconciling SPD-2 and SPD-3 through the new rulemaking process could likely prove beneficial to the commercial space industry.

California Federal Court Declares Drones are Aircraft [Alert]

January 18, 2019

William Walsh discusses the decision in Philadelphia Indemnity Insurance Company v. Hollycal Production, Inc and what it could mean for the future of drone law.

Could Criminal Penalties for Negligent Drone Operations Extend to Corporations? [Aviation Alert]

May 24, 2018

Bill Walsh discusses why criminalization of negligent drone operation could negatively impact ICAO's and the United States' goal of transparency in aircraft accident investigations.

FAA’s Automated UAS Approval System — A Significant Step Forward [Aviation Alert]

March 19, 2018

Bill Walsh discusses the FAA's LAANC system, next steps in implementing it nationwide, and how this will impact the drone industry and lead to the day of the drones.

Drone Advisory Group Raising Regulation Questions [Aviation Alert]

November 08, 2017

Bill Walsh discusses a recent article in the Washington Post and its implications for the Drone industry.

Drone Risks Create New Legal Challenges

September 01, 2017

William Walsh, a member of the firm's Aviation Litigation Practice, authored, "Drone Risks Create New Legal Challenges," for Risk Management Magazine.

Perspectives: Commercial Use of Drones Could be Grounded by Costs [Business Insurance]

January 02, 2017

William Walsh, co-chair of the Aviation Industry Team, discusses the significant tension between the Federal Aviation Administration regulation for commercial drones and any conceivable economic model of a profitable retail drone delivery operation.

Events & Seminars

Past Events

2016 London Market USA Study Tour

July 10, 2016 - Chicago, IL

2016 RIMS Annual Conference

April 10, 2016 - San Diego, CA

ACI 2016 Risk Management Conference

January 13, 2016 - Nashville, TN

ACI's 16th Annual Risk Management Conference

January 15, 2015 - San Diego, CA

2014 Seattle Insurance Seminar

September 25, 2014 - Seattle, WA


  • Gonzaga University School of Law, J.D., cum laude, 1992
  • University of Washington, B.A., 1988

Awards & Honors

Martindale-Hubbell AV Preeminent® rated

Washington Super Lawyer, 2003-2006, 2010-2021

Top 100 Washington Super Lawyer, 2014-2015

  • Washington
  • Oregon
  • Alaska
  • U.S. Court of Appeals for the Ninth Circuit
  • U.S. Court of Appeals for the Eighth Circuit
  • U.S. District Court -- North Dakota
  • U.S. District Court -- Western District of Washington
  • U.S. District Court -- Eastern District of Washington
  • U.S. District Court -- Oregon
  • International Association of Defense Counsel
  • Washington Defense Trial Lawyers Association
  • Marine Insurance Association of Seattle
  • American Bar Association, Forum on Air and Space Law Member
  • Aviation Insurance Association