Heather L. Marx



(612) 260-9004

(612) 260-9084

Recent News:

Fourteen Cozen O’Connor Lawyers Named to Minnesota Monthly “Top Lawyers” list

The list will appear in the July/August 2024 issue of Minnesota Monthly

Heather applies her experience in the areas of complex business and commercial litigation to represent a variety of clients. Her practice includes the representation of corporations and individuals in corporate contractual and partnership disputes, customs, imports, and trade matters, real estate and leasing issues, and litigation related to leases and guaranties, bankruptcy adversary proceedings, commercial transactions and disputes, and issues of employment law and benefits. Heather is vice-chair of the firm’s Customs, Imports and Trade Remedies practice. Based in Minneapolis, the practice is one of the only full-service trade practices based outside coastal hubs. She also serves as the co-managing partner of the Minneapolis office.

Heather handles contract disputes, commercial and private loan disputes, business liquidation priority issues, lease obligations, receivership appointments, real estate transactions, insurance claims, import-export contracts and litigation, and employment and labor disputes. Further, Heather's experience in bankruptcy litigation includes years of representing both debtors and creditors in significant adversary disputes and work-outs, including clawback litigation both in Minnesota and other states.

Heather advises both domestic and international clients on strategies for foreign-based manufacture, importation, and distribution of goods and how to safeguard against anti-competitive trade barriers, regulatory systems, and trade remedies. She represents clients in matters before U.S. Customs and Border Protection, the U.S. Department of Commerce, the International Trade Administration, and the U.S. Trade Representative.  Cozen O’Connor’s Customs, Imports, and Trade Remedies lawyers also represent the interests of clients before the United States District Courts, the U.S. Court of International Trade, and the Court of Appeals for the Federal Circuit.

Heather is involved in all aspects of litigation, from initial pleadings through discovery, motion practice, negotiated resolution, trial, and any necessary appeals. Her extensive litigation experience gives her perspective on how best to achieve her clients’ goals in a cost-effective and positive manner, in even the most competitive of business environments. Having obtained significant appellate victories, she can also provide clients with the insight and excellence to understand how to protect their significant legal victories. She has authored numerous articles detailing both litigation mechanics and emerging issues in litigation involving business clients and frequently leads seminars for human resource professionals in regard to cutting-edge human resources developments.

Heather has been recognized in Minnesota and nationwide for her legal experience. She was recently named to the 2023 Minnesota Lawyer Magazine "Top Women in Law" list based on her leadership, professionalism, accomplishments, and passion for making a difference. In 2021, The American Lawyer named her to its inaugural Midwest Trailblazer list. The trailblazers are agents of change who have moved the needle at their respective firms, making significant marks on practice, policy, and technological advancements in their areas of legal practice. 

She has been previously recognized by Minnesota Law & Politics as one of its Rising Stars and by Minneapolis/St. Paul Magazine as one of the Top Women Attorneys in Minnesota. For her pro bono work, she has been consistently recognized since 2016 with a North Star Lawyer distinction from the Minnesota State Bar, for providing more than 50 hours of pro bono legal service annually to the community.

Heather is a graduate of Gustavus Adolphus College (B.A, 1999) and Georgetown University Law Center (J.D., 2002). She is also currently an adjunct professor at the University of St. Thomas Law School, where she teaches the bankruptcy litigation clinic.



Fourteen Cozen O’Connor Lawyers Named to Minnesota Monthly “Top Lawyers” list

May 06, 2024

The list will appear in the July/August 2024 issue of Minnesota Monthly

10 Questions with Heather Marx

November 14, 2023

Heather Marx was featured in a Hennepin Lawyer article discussing her practice, the unique challenges women face in the legal profession, and the advice she will never forget.

2023 Top Women in Law: Heather Marx

November 10, 2023

Heather Marx was featured in a Minnesota Lawyer Magazine spotlight, discussing her career as an attorney.

Cozen O’Connor’s Heather Marx Named to Minnesota Lawyer’s Inaugural Top Women in Law List

September 08, 2023

Heather Marx, a member of Cozen O’Connor’s Commercial Litigation practice and vice-chair of the firm’s Trade Remedies practice, has been named by Minnesota Lawyer Magazine to its inaugural “Top Women in Law” list.

Watch: Will Biden’s Task Force Bring Manufacturing Back to the U.S.?

July 14, 2021

Kristi Zentner and Heather Marx were featured in SupplyChainBrain discussing how the recommendations of Biden’s supply chain task force might lead to real progress toward the return of domestic manufacturing of critical supplies.

Tips for Expediting the Supply Chain Backlog

May 25, 2021

Heather Marx was featured in an article published by EPS News discussing how there are certain measures businesses can take to streamline the processing of shipments by U.S. Customs and Border Protection (CBP).

Cozen O’Connor’s Heather Marx named to The American Lawyer’s 2021 Midwest Trailblazers list

April 20, 2021

Heather Marx, a member of Cozen O’Connor’s Commercial Litigation practice and vice-chair of the firm’s Trade Remedies practice, has been named to The American Lawyer’s 2021 inaugural list of Midwest Trailblazers.

Cozen O'Connor: Women in Leadership

December 04, 2019

Four of Cozen O'Connor's Minneapolis-based attorneys - Heather Marx, Barbara Muller, Tina Syring and Kristi Zentner - are highlighted in a Women in Law leadership feature in Attorney at Law Magazine.

Breaking the Ice: Trade practice grows as trade wars escalate

October 30, 2019

Heather Marx was featured in the Minnesota Lawyer discussing her practice along with her life outside of the office.


Managing Supply Chain Consequences Of Russian Sanctions

April 13, 2022

Heather Marx and Kristi Zentner contributed an article to Law360 discussing how President Joe Biden has issued executive orders restricting trade with Russia and has revoked Russia's permanent normal trade relations.

USTR Annual Report to Congress on China’s Compliance with WTO: Request for Public Comments [Alert]

August 23, 2021

T. Wallrich, H. Marx, and K. Zentner discuss the USTR’s Trade Policy Staff Committee soliciting public commentary regarding China’s compliance with its obligations to the WTO.

COVID Lessons Learned: Supply Chains Post-Pandemic [Industry Today]

June 07, 2021

Heather Marx and Kristi Zentner published an article in Industry Today discussing the impact of the COVID-19 pandemic on the global supply chain.

New U.S. Ban on Chinese Cotton Suppliers Adds Stress to Fashion Industry’s Weakened Supply Chain [Alert]

September 21, 2020

Danielle Garno, Heather Marx, and Samuel Mogensen discuss U.S. Customs and Border Protection five WROs banning cotton, apparel, and other goods that were produced with state-sponsored forced labor in the Xinjiang Uyghur Autonomous Region.

Fashion Industry Adaptations Amid Trade War, Pandemic

September 18, 2020

Heather Marx published an article to Law360 discussing the different effects that trade policies and the COVID-19 pandemic have had on the fashion industry.

Events & Seminars

Past Events

How to Draft Your First (or Next) Contract

July 27, 2023 - Minneapolis

Update on Student Loans and Bankruptcy

October 17, 2022 - Minneapolis, Minnesota


January 25, 2022 - Webinar

2021 Trade Year in Review

November 11, 2021 - Webinar

Transferring a Business

January 13, 2021 - Webinar

Updates on U.S. Trade Remedies

December 14, 2020

12th Annual In-House Counsel Conference

July 28, 2020 - Philadelphia, PA


  • Georgetown University Law Center, J.D., 2002
  • Gustavus Adolphus College, B.A., 1999

Awards & Honors

Minnesota Monthly, Top Lawyers in Minnesota, 2024

Minnesota Lawyer, Top Women in Law, 2023 

The American Lawyer, 2021 Midwest Trailblazer

Minnesota Super Lawyers Rising Star 2008-2018

Selected as one of the "Top Women Attorneys in Minnesota" by Mpls. St. Paul Magazine 2014-2018

North Star Lawyer distinction for pro bono service 2016-2022

  • Minnesota
  • U.S. Supreme Court
  • Minnesota State Courts
  • U.S. District Court - District of Minnesota
  • U.S. Bankruptcy Court - Minnesota
  • U.S. Court of International Trade
  • U.S. Court of Appeals for the Eighth Circuit
  • U.S. Court of Appeals for the Federal Circuit
  • U.S. Tax Court

Hennepin County Bar Association

American Bar Association

Minnesota Women Lawyers

American Bankruptcy Institute