Shannon Riordan Armstrong

Shannon Riordan Armstrong

Shannon Armstrong is a trial lawyer concentrating on resolving complex business disputes. Shannon approaches litigation with a keen understanding of her client's business goals and applies her formidable legal, analytical, and interpersonal skills to successfully navigate legal disputes on behalf of her clients. She earns praise for her professionalism, responsiveness, and clear communication style in representing plaintiffs and defendants in commercial litigation.

Shannon represents some of the firm’s most sophisticated clients in litigation ranging from breach of contract actions to elder financial abuse.  She has experience in state and federal courts, arbitrations and mediations, and in all stages of the litigation process, including trial. 

Shannon has developed several unique niches within her practice.  She has particular experience litigating cases involving the rights of minority shareholders in closely held corporations, and has specific skill in early resolution of these challenging cases.  Additionally, she has developed expertise in the legal issues surrounding continuing care retirement communities (CCRCs) and has represented residents of these communities in cutting-edge litigation.

Prior to joining MHGM, Shannon practiced complex litigation at a Portland law firm where she represented corporations and individuals in criminal and regulatory proceedings. Shannon effectively negotiated settlements on behalf of her clients, including difficult-to-achieve pre-indictment resolutions. She advocated for clients in cases involving a range of criminal allegations, including voting and election fraud, environmental offenses, mortgage fraud and Foreign Corrupt Practices Act violations.

Shannon is a native Oregonian. She began her career as a law clerk for the Honorable Melvin Brunetti at the Ninth Circuit Court of Appeals in Reno, Nevada, then returned to Portland where she clerked for the Honorable Ancer L. Haggerty at the United States District Court for the District of Oregon.


Experience and Affiliations

  • Secretary, Oregon State Bar Legal Ethics Committee
  • Member, Multnomah Bar Association CLE Committee
  • Board Member, Co-membership Chair, Oregon Chapter of the Federal Bar Association
  • Delegate, Oregon State Bar House of Delegates
  • Member, Oregon Women Lawyers
  • Member, Oregon Trial Lawyers Association

Education

  • University of California, Berkeley School of Law (Boalt Hall) — J.D., 2005
  • University of Oregon — B.A. with honors in political science, magna cum laude

Admitted to Practice

  • Oregon
  • Washington
  • U.S. District Court, District of Oregon
  • Ninth Circuit Court of Appeals

Our Attorneys

Shannon Riordan Armstrong
Markowitz Herbold Glade & Mehlhaf PC
3000 PacWest Center
1211 SW 5th Ave.
Portland
OR
97204-3730

Contact

Phone503-295-3085
Email

    Legal Rights & Responsibilities in California Continuing Care Retirement Communities

    March 21, 2013
    McGeorge School of Law, Sacramento, CA
    MHGM Attorney Shannon Armstrong is a featured speaker at this day-long conference and will discuss the firm's recent case Rogue Valley Manor v. Pacific Retirement Services.