Services & Industries
J.D., cum laude, University of Michigan Law School, 1992
B.A., cum laude, University of Vermont, 1987
Bar & Court Admissions
Oregon State Bar
U.S. District Court, District of Oregon
U.S. Court of Appeals, 9th Circuit
Zach’s practice is in complex business and securities litigation. He has also focused on regulatory litigation, insurance coverage litigation, and the protection of rights in intellectual property.
Zach’s litigation successes include several matters for a major athletic-footwear and apparel manufacturer, including two separate successful motions for preliminary relief barring competitors from infringing on the client’s exclusive licensing rights.
He has also successfully pursued several insurance coverage claims. In one case, he helped ensure full crime insurance recovery and prosecution of an employee guilty of multi-million dollar embezzlement. In another, he recovered for his client attorneys’ fees on a theory that had been rejected by courts in most other states.
His experience includes defending an Oregon company in a lengthy arbitration before a panel appointed by the International Chamber of Commerce in which he successfully limited the award on a $14,000,000 claim for defective design and installation of a Belgian chemical factory to only $90,000.
He also represented the former CEO of a bankrupt agricultural cooperative in a complex mediation that successfully resolved claims in excess of $50,000,000. Recently, he represented a group of chemical companies and their owner in multi-jurisdiction litigation connected with one of the largest and most complicated divorce proceedings in Oregon.
In his securities litigation practice, among other complex cases, Zach has represented and managed the litigation for a former director of Enron who was named as a defendant in scores of cases in multiple federal and state jurisdictions.
Before joining Tonkon Torp in 1993, Zach spent one year clerking for the Honorable Deanell R. Tacha, United States Court of Appeals for the 10th Judicial Circuit.
Zach’s interests include music, basketball, and enjoying life with his wife and two daughters.
Tonkon Torp was lead counsel for a former executive officer and board member of Enron in dozens of federal and state court lawsuits in more than 20 states. We represented our client in civil lawsuit proceedings involving the Department of Labor and SEC, and a myriad of other proceeds obtaining favorable settlements to resolve all the proceedings before trial.
Stormwater Compliance Counseling
Regularly represent a variety of manufacturing and commercial operations to come into or maintain compliance with state, municipal, and local stormwater regulations.
Bet the Company Cases
Tonkon Torp has been involved in a collection of “bet the company” cases regarding D.B. Western, the largest producer of formaldehyde in the world. The firm has managed criminal and civil litigation and remediation related to the alleged illegal disposal of formaldehyde-related wastes. In 2010, following significant discovery and motion practice, the federal government dismissed its criminal complaint against the company. Litigation with the State of Oregon is ongoing.
Defending a Former Director in Enron Fallout
Enron’s $63 billion bankruptcy in 2001 sent shockwaves through the financial community, triggering the collapse of one of the world’s largest accounting firms and setting in motion corporate governance changes that would alter the face of corporate America.
Community Involvement & Activities
The Third Angle New Music Ensemble
Past Board of Directors
Chapman Educational Foundation
Past Board of Directors
Federal Bar Association
Multnomah Bar Association
Oregon Association of Defense Counsel
The Best Lawyers in America
2013-2023, Commercial Litigation
2013-2023, Litigation – Environmental
2012-2023, Litigation – Securities
2023, Lawyer of the Year – Litigation – Environmental, Portland
Five Tonkon Torp Partners Named Portland Lawyer of the Year
Five Tonkon Torp partners have been named 2023 Portland Lawyer of the Year in their respective specialties by The Best Lawyers in America.
Best Lawyers in America® Includes 53 Tonkon Torp Attorneys on 2023 List
Fifty-three Tonkon Torp lawyers representing 37 practice areas have been selected for inclusion in The Best Lawyers in America® 2023. Nearly all the attorneys have been previously named to the peer-review list, and most have been listed for more than 10 years.
Tonkon Torp Unveils Shareholder Disputes & Governance Practice Group
Tonkon Torp has launched a new practice group, Shareholder Disputes & Governance.
Best Lawyers in America® Includes 53 Tonkon Torp Attorneys on 2022 List
Fifty-three Tonkon Torp lawyers representing 39 practice areas have been selected for inclusion in The Best Lawyers in America® 2022
Best Lawyers in America® Includes 49 Tonkon Torp Attorneys on 2021 List
Forty-nine Tonkon Torp lawyers representing 36 practice areas have been selected for inclusion in The Best Lawyers in America® 2021. A majority of attorneys have been named to the peer-review list in past years, and most have been recognized for more than five years.
Oregon Senate Passes Brownfields Land Bank Bill
By a vote of 26-2, the Oregon Senate passed the “Brownfields Land Bank Bill” today. HB 2734 had previously passed the House with a vote of 43-15. The bill now heads to the Governor’s office for signature. With the enactment of the Brownfields Land Bank Bill, local governments will have a significant new tool to assist them in redeveloping brownfields.