Contact M. Quinn Oppenheim

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M. Quinn Oppenheim

Litigation Attorney

315 Fifth Avenue S, Suite 1000
Seattle WA 98104

©2019 Summit Law Group PLLC

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M. Quinn Oppenheim

Litigation, Labor/Employment

(206) 676-7106

Profile Introduction

Quinn is a trial lawyer who maintains a general litigation practice with an emphasis on employment-related matters. She represents corporations in complex civil litigation matters, including employment disputes, class action defense, intellectual property litigation, commercial contract disputes, and corporate fiduciary duty litigation.  Quinn serves as the leader of Summit’s Litigation Practice Group.


Prior to joining Summit Law Group, Quinn worked as an Assistant Public Defender with the Defender Association of Philadelphia. While there, she represented clients charged with serious felonies and tried hundreds of cases to verdict. 

Representative Cases/Matters

  • Defending an employer in a wage and hour class action relating to allegations of pre-and post-shift work.
  • Advising an online retailer about non-compete agreements and implications for hiring decisions.
  • Defending an insurance company against allegations of tortious interference with a competitor’s business.
  • Defending an international electronics manufacturer in a toxic tort class action.
  • Representing a local marine company in a copyright and trade secrets dispute with a former employee.
  • Defending an online advertising company against allegations of fraud and breach of contract.
  • Defending a medical device manufacturer in a lawsuit brought by the former CEO alleging wage withholding and breach of a trademark transfer agreement.
  • Defending a local company against allegations of sexual harassment by a top executive.

Publications & Speaking Engagements

  • Author, "Minority Report: The Future of Legal Services and AI," Chambers and Partners, eDiscovery & Disclosure 2019, Trends and Developments, January 2019
  • Speaker, "Employment Law Update," Labor Relations Institute, May 2018
  • Author, "Update on New Washington State Employment Laws," Summit Law Group Labor & Employment Newsletter, May 2018
  • Speaker, "Gathering and Using Electronic Discovery Evidence," Washington State Bar Association Evidence CLE, August 2018


Community Service

  • Board of Directors, SightConnection (2013-2015)


  • Columbia University School of Law (J.D., 2004); Harlan Fiske Stone Scholar 
  • Bryn Mawr College (A.B., 2001, magna cum laude)

Bar Admissions

  • Washington State
  • California
  • Pennsylvania
  • United States District Court, Western District of Washington
  • United States District Court, Eastern District of Washington
  • United States District Court, Eastern District of Pennsylvania
  • United States Court of Appeals, Ninth Circuit