Attorney Dayna E. Underhill

Dayna E. Underhill

Owner / Attorney

(503) 887-7440

Underhill Law Office
515 NW Saltzman Road, #603
Portland, OR 97229

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About Dayna

An experienced legal ethics practitioner and commercial and employment litigator, Dayna focuses her practice on the provision of ethics and risk management advice to lawyers, law firms, corporate in-house counsel, government attorneys, elected officials and political parties. She defends, advises, and serves as an expert on all aspects of the law governing lawyers and government officials including the defense of state bar and government ethics complaints, law firm formation, organization, management and dissolution, conflicts of interest, attorney-client privilege, lawyer disqualification and sanctions, lawyer mobility and lateral hiring, multi-jurisdictional practice, and use of social media.

Dayna’s employment counsel experience provides her with unique insights which allow her to advise lawyers regarding the interplay between their ethical obligations and their obligations as an employer.

Dayna’s depth of litigation and legal ethics experience, combined with her breadth of professional relationships locally, regionally and nationally, allows her to discretely deliver experienced, strategic, respected and committed advice and counsel to her clients.

Prior Experience

As a litigator for over 30 years, Dayna successfully represented companies and law firms in a broad range of disputes including breach of contract, unfair competition, trade secret violations, discrimination, leave laws, executive compensation and employee severance. In previous roles, she focused on plaintiff litigation matters involving employment, securities and complex commercial issues. Dayna began her career nearly 30 years ago in the public defender’s office. As a result of these multifaceted litigation experiences, she brings a well-rounded perspective to each client’s matter.

Professional and Community Engagement

Dayna is a regular local, regional, and national legal ethics speaker and author and is active in both professional and community activities. She has served on the Oregon State Bar House of Delegates, Oregon State Bar Legal Ethics Committee, Multnomah Bar Association Professionalism Committee, and Washington State Bar Disciplinary Advisory Roundtable. She has also served in the community on the Board of Trustees for the Oregon Law Institute, the Girl Scouts of Oregon and Southwest Washington, and Northwest Academy, where she currently serves as Board Vice-Chair and Chair of Risk Management.

Dayna is a committed pro bono and access to justice advocate who has provided 50+ hours of pro bono service every year for over a decade throughout Oregon and Washington.

Practice Areas


  • Suffolk University Law School, J.D.
  • Hartwick College, B.A., Political Science, cum laude

Bar Admissions

  • Oregon
  • Washington

Court Admissions

  • U.S. District Court for the District of Oregon
  • U.S. District Court for the Eastern District of Washington
  • U.S. District Court for the Western District of Washington
  • U.S. Court of Appeals for the Ninth Circuit


  • Oregon State Bar Association, Legal Ethics Committee, former Member
  • Oregon State Bar Association, House of Delegates, former Member
  • Oregon Women Lawyers
  • Oregon Law Institute, Board of Directors, former Member
  • Washington State Bar Association, Disciplinary Advisory Roundtable, former Member
  • Association of Professional Responsibility Lawyers
  • American Bar Association, Labor and Employment Section
  • American Bar Association, Center on Professional Responsibility
  • Multnomah Bar Association, Professionalism Committee, former Member
  • Girl Scouts of Oregon and Southwest Washington, Board of Directors
  • Northwest Academy, Board of Trustees

Honors & Awards

  • The Best Lawyers in America®, “Best Law Firms” Ethics and Professional Responsibility Law; Litigation – Labor and Employment, 2023, 2024.
  • The Best Lawyers in America®, Ethics and Professional Responsibility Law, 2016-2024; Litigation – Labor and Employment, 2021-2024.
  • The Best Lawyers in America®, Ethics and Professional Responsibility Law Lawyer of the Year, Portland, Oregon, 2017


Outside Ethics Counsel

Dayna serves as outside legal ethics and regulatory counsel to dozens of law firms of all sizes, multinational corporate legal departments, and government counsel throughout the Pacific Northwest and beyond.

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Defense of Bar and Other Regulatory Complaints

Dayna is regularly retained to defend lawyers accused of violating the Oregon and Washington Rules of Professional Conduct.

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Expert Legal Ethics Witness Consultation and Testimony

Dayna is regularly retained as both a consulting and testifying legal ethics expert on all aspects of the law governing lawyers.

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Employment Counsel to Law Firms

Dayna serves as outside employment counsel to law firms throughout the Pacific Northwest.

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Government Ethics and Election Law

Dayna provides Oregon government ethics and election law advice and counsel to government agencies, elected and appointed officials, and political parties.

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(503) 887-7440