Heidi L. Mandt

Heidi L. Mandt

Portland, OR recognized lawyers icon Recognized in Best Lawyers since 2017
Williams Kastner

21 Best Lawyers awards

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Awarded Practice Areas

Personal Injury Litigation - Defendants Litigation - Insurance Product Liability Litigation - Defendants
*Named the "Lawyer of the Year" in this practice area in the 2026 edition in Portland, OR.

Biography

Heidi Mandt is an accomplished trial attorney with a practice focused on defending clients in product liability, professional malpractice (including medical and other licensed professionals), toxic torts, and general insurance matters. She also advises and represents clients in insurance coverage disputes. Over her career, Heidi has tried more than 20 cases to verdict in both state and federal courts, involving claims ranging from product liability and personal injury to complex commercial disputes.

Heidi brings deep experience in high-stakes litigation, including cases involving catastrophic injuries, wrongful death, construction liability, breach of contract, and first- and third-party insurance claims. Her consistent courtroom success and leadership in cases with significant financial exposure have made her a trusted advocate in complex litigation.

She routinely defends a wide array of clients—ranging from individuals and retail businesses to construction firms, automotive and truck manufacturers, and chemical companies—in both injury and commercial claims. Heidi has been recognized by The Best Lawyers in America® every year since 2017 for her excellence in litigation.

Williams Kastner

21 Best Lawyers awards

Williams Kastner logo

Overview

  • Willamette University, J.D., graduated 1995
  • Willamette University, J.D., graduated 1995

Client Testimonials

Awards & Focus

Lawyer of the Year Badge - 2026 - Personal Injury Litigation - Defendants
Named "Lawyer of the Year" by Best Lawyers® for:
  • Personal Injury Litigation - Defendants, Portland, OR (2026)
Recognized in The Best Lawyers in America® 2026 for work in:
  • Litigation - Insurance
  • Personal Injury Litigation - Defendants
  • Product Liability Litigation - Defendants

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