Contact M. Quinn Oppenheim

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Otto G. Klein III

Labor Attorney

315 Fifth Avenue S, Suite 1000
Seattle WA 98104

©2023 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 and governmental entities in non-compete and trade secrets litigation, employment discrimination cases, and wage and hour matters.  Quinn is pragmatic and efficient in her approach – she aims to counsel and advise her clients and negotiate with her opponents to minimize the risks and costs of litigation.


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.


Outside of the office, you can find Quinn balancing poorly at barre class, wandering around Capitol Hill, and seeking out spicy Chinese food.



Quinn Oppenheim
Rated by Super Lawyers

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  • 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

Community Service

  • Litigation Practice Group Leader, Summit Law Group (2016-2019)
  • Board of Directors, SightConnection (2013-2015)


  • Washington Super Lawyers list (2020 - 2022)
  • Labor & Employment Star, Benchmark Litigation (2019-2021)
  • 40 & Under Hot List, Litigation, Benchmark Litigation (2017-2021)
  • Selected to “Rising Star" honor, Washington Super Lawyers (2013 - 2014)

Publications & Speaking Engagements


  • Speaker, “Lessons Learned from Female & Minority Leaders, Litigators, and Dealmakers,” Women, Diversity & Change Summit, November 2019
  • Speaker, “Washington’s New Non-Compete Law,” New Tech Northwest Workshop, June 2019
  • Speaker, “Wage and Hour Law Trends,” Washington State Transit Insurance Pool Board Meeting, March 2019
  • 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

Representative Cases/Matters

  • Defending a call center in a wage and hour class action relating to allegations of pre-and post-shift work.  After Plaintiffs’ claims were reduced significantly via a series of summary judgment wins, they voluntarily dismissed their remaining claims on the eve of trial.
  • Assisting an online retailer with non-compete matters.  Advise regarding non-compete implications in hiring new employees and negotiate or litigate regarding non-compete violations by departing employees.
  • Defending a local transit agency in a wage and hour class action relating to allegations of pre-shift work.
  • Defending an insurance brokerage against allegations of tortious interference with a competitor’s business and misappropriation of a customer list.
  • Representing a local marine company in a copyright and trade secrets dispute with a former employee.
  • Defending a medical device manufacturer against wage withholding allegations.   
  • Defending a local beverage company against allegations of sexual harassment by a top executive.
  • Defending Washington municipal and governmental entities in various employment discrimination cases, including allegations of sexual harassment; gender, age, and disability discrimination; and retaliation, including whistleblower retaliation.