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Chelsey Mam

Chelsey Mam


Chelsey Mam is a litigator who focuses her practice on insurance recovery, complex commercial disputes, and personal injury cases. She joined the firm in 2015 and is rapidly gaining courtroom experience—starting with a victory in her first trial, in which she played a substantial speaking role. She recently attended an intensive and nationally recognized trial advocacy training to further improve her trial skills. 

In 2019 Chelsey was again recognized as a Rising Star by Washington Super Lawyers.

Chelsey graduated first in her class at Gonzaga University School of Law and received a wide range of awards, for service and leadership as well as nine awards for academic excellence.  She was editor-in-chief of the Gonzaga Journal of International Law

After law school, Chelsey served as law clerk to the Hon. David Armstrong of the Washington State Court of Appeals, Division II.

Toogle Accordion State

Professional Experience

Representative Matters

Coverage Counsel to large regional health care provider

GTTC lawyers Frank Cordell, Chelsey Mam, and Guin Bogusz represent a regional health care provider in a claim against its insurers under an employment practices liability policy written on a claims-made-and-reported basis.  The insurers denied coverage on grounds that the policyholder had failed to timely notify the insurers of the claim.  The policyholder notified the insurers of the claim during the policy period, but after the 60-day deadline established by a policy condition.  The GTTC team successfully argued that, under these circumstances, Washington’s “prejudice rule” applies, meaning that the insurers are not relieved of their coverage obligation unless they can prove actual and substantial prejudice as a result of the delay in notice.

Coverage Counsel to Snohomish County after Oso landslide tragedy

On March 22, 2014 a massive landslide killed 43 people in the Steelhead Haven neighborhood near the community of Oso in Snohomish County, Washington. In the aftermath, victims and their families filed dozens of wrongful death claims against three defendants, including Snohomish County. These claims have been consolidated in King County into the State’s largest-ever wrongful death action. Frank Cordell was selected to represent the County as coverage counsel, and, along with Chelsey Mam and Greg Pendleton, currently is prosecuting litigation against the insurers in federal court in Seattle.


Long-tail coverage counsel to Weyerhaeuser Company

For nearly 30 years, GTTC’s lawyers have served as coverage counsel to iconic Northwest business Weyerhaeuser Company. Frank Cordell and Susannah Carr, with the help of Chelsey Mam, represented the company in litigation against the London Market, AIG, and other insurers over coverage for liability arising out of the Kalamazoo River Superfund Site, one of the largest and most costly Superfund sites in history.


Negligence case against apartment complex in hash oil explosion

A tenant manufacturing hash oil in his Bellevue apartment caused a massive explosion that destroyed ten apartments and their contents and injured residents. With the help of Michael Rosenberger and Chelsey Mam, a tenant who lived next-door to the hash operation sued Hampton Greens Apartments and its property manager, Riverstone Residential West, for negligence. Despite having received a report of the drug operation, the complex and the property manager had failed to take action to commence eviction. In a 2015 bench trial, the King County Superior Court awarded GTTC’s client the full value of his destroyed property and general damages within the specific range asked for in closing argument.

Professional & Civic Involvement

  • YMCA Youth Mock Trial State Competition, Volunteer Rater 

Representative Clients

Publications & Presentations

  • Co-Editor, Washington Civil Procedure Desk Book, “Rule 68: Offer of Judgment,” 3d ed. 2014 

Bar/Court Admissions

  • Washington State Bar 
  • United States District Court, Western District of Washington
  • United States District Court, Eastern District of Washington


Prior to law school, I studied abroad at Kwame Nkrumah University of Science and Technology in Ghana. My travels have also taken me to Europe, Costa Rica, and the Canary Islands. As a new attorney, my travel has been less extensive in recent years.  Instead, much of my free time is spent with family or taking road trips in the beautiful Northwest. I also enjoy playing softball on a co-ed team, dance fitness, camping, and gardening.


  • J.D., Gonzaga University School of Law, summa cum laude, 2011
    • Dean’s Academic Achievement Award for graduating 1st in the class
    • Morey-Maurice Award for Service and Leadership awarded to a third year student
    • CALI Award for Academic Excellence in several subject areas
    • Editor-in-Chief of Gonzaga Journal of International Law
  • B.A. (International Studies), University of Washington, 2005
    • Kwame Nkrumah University of Science and Technology (Ghana), study abroad, 2005 


  • Recognized as a Rising Star by Washington Super Lawyers