Maddie is an associate in the firm’s litigation group where she focuses on complex litigation matters including environmental torts, securities, and class action matters.

She was a member of the trial team pursuing claims on behalf of the State of Oregon against Monsanto Company for PCB contamination, which rendered a nearly-$700 million settlement for the State, the largest environmental settlement in Oregon history. Maddie continues to litigate claims for PCB contamination against Monsanto Company on behalf of the City of Seattle and she is currently a member of the team representing the State of Oregon against various entities, including DuPont and 3M, for PFAS contamination.

Prior to joining Stoll Berne, Maddie served as a law clerk for the Honorable Scott Shorr (Oregon Court of Appeals).

Northwestern School of Law, Lewis & Clark Law School, JD, summa cum laude, 2019
Lewis & Clark Law Review, Lead Article Editor
Public Interest Law Project, Stipend Recipient and Auction Committee Head
Wendy Kopp Award, Recipient
Manche Langley Scholarship Dean’s Scholarship for Excellence, Recipient
First Year Moot Court, Best Oral Argument

Otterbein University, B.A., Psychology and Women’s, Gender, and Sexuality Studies, magna cum laude with Honors, May 2015
Outstanding Honors Thesis Award
Winter-Miller Leadership Award

Maastricht University, Maastricht, The Netherlands
Semester-long international exchange program, August 2014 – December 2014

Oregon State Bar, 2019

Stoll Berne
Associate, 2022-present

The Honorable Scott Shorr (Oregon Court of Appeals)
Judicial Law Clerk, 2019-2022

Metropolitan Public Defender
Certified Law Student, 2018

Criminal Justice Reform Clinic
Law Clerk, 207-2018

Professor Ozan Varol, J.D.
Research Assistant, 2017-2019

Medical Legal Partnership of Oregon
Legal Extern, 2017

Imprint Program
Mentor, 2020

Girls Inc. of the Pacific Northwest
Girl’s Guide, 2015-2016

Senator Jeff Merkley, Portland, Oregon
Intern, 2015

Otterbein University Board of Trustees
Student Trustee, 2013-2015

Otterbein University Women & Gender Resource Center
Peer Advocate, September 2012-2014

A.S.I.D.E., El Progreso, Honduras
Volunter Intern, 2011

Practice Areas


Stoll Berne's attorneys provide expert advice to clients on appellate issues at every stage of our representation. The firm's attorneys have appeared before federal circuit courts of appeal throughout the United States and the Oregon appellate courts.

Business Litigation

From everyday contract disputes to bet-the-company litigation, our litigation team works to understand each party's priorities and to create a solution that best serves you.

Class Actions

As Oregon's leading plaintiffs'-side class actions firm, we help our clients to level the playing field and find justice. We have earned our reputation and work hard for our clients.


We have experience litigating environmental issues including mass environmental torts, consumer products contamination, and state and federal natural resource damage recovery.

Representative Cases

Natural Resource Damage and Environmental Contamination

As Special Assistant Attorneys General for the State of Oregon, Stoll Berne, along with co-counsel Keller Rohrback, worked with Attorney General Ellen Rosenblum and attorneys from the Oregon Department of Justice on claims against Monsanto seeking recovery for damage caused to Oregon’s wildlife and environment by polychlorinated biphenyls (PCBs).

Patent Litigation re Waterproof-Breathable Apparel Technology

In current patent litigation regarding waterproof-breathable apparel technology, Stoll Berne attorneys Tim DeJong and Maddie Holmes represents Columbia Sportswear Company, a leading company in the global outdoor apparel, footwear, accessories, and equipment markets.


Stoll Berne and Keller Rohrback defeat Monsanto’s Motion for Summary Judgment in PCB Contamination Lawsuit

On February 2, 2024, the U.S. District Court for the Western District of Washington denied Monsanto’s Motion for Summary Judgment in ongoing PCB litigation. Stoll Berne and co-counsel at Keller Rohrback represent the City of Seattle in this suit and seek to hold Monsanto accountable for the harms that Monsanto’s PCBs have caused to the City’s stormwater and drainage system and the Lower Duwamish Waterway.

Stoll Berne Attorneys Rank in The Best Lawyers in America 2024

Stoll Berne is excited to announce that fifteen of our attorneys were recently selected by their peers for inclusion in The Best Lawyers in America 2024® in 18 different categories.

State of Oregon Files PFAS Contamination Lawsuit

The State of Oregon, by and through Oregon Attorney General Ellen Rosenblum, filed a lawsuit on May 31, 2023, for injuries to the State of Oregon’s lands, waters, wildlife, and other natural resources; property; residents; and consumers against nearly two dozen defendants for the use of toxic per- and polyfluoroalkyl substances (PFAS) in firefighting foam.

Nearly $700 Million Settlement Reached by State of Oregon in Monsanto PCB Contamination Lawsuit

Stoll Berne, as Special Assistant Attorney General to Oregon Attorney General Ellen Rosenblum and the Oregon Department of Justice, along with its partners at Seattle’s Keller Rohrback, are pleased to announce the settlement of State of Oregon v Monsanto for the amount of $698,000,000 ($698 Million).

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