Heather L. Marx



(612) 260-9004

(612) 260-9084

Heather will be speaking at an upcoming event:

Resetting the Special Relationship and the US-UK Trade Agenda

Webinar 03/10/2021

March 10, 2021 - Webinar

Event Details 

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 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. As a product of her significant experience, Heather is also an adjunct professor, currently teaching the bankruptcy litigation clinic at the University of St. Thomas Law School.

Each from 2008 through 2018, Heather was recognized by Minnesota Law & Politics as one of its "Rising Stars." This distinction recognizes the top up-and-coming attorneys and is awarded to no more than 2.5 percent of practicing attorneys in Minnesota. The 2014-2018 editions of Mpls.St.Paul Magazine also recognized Heather as one of the "Top Women Attorneys in Minnesota."

Finally, for her work in 2016 and again in 2017 and as confirmation of her commitment to our firm's pro bono mission, Heather has also received the North Star Lawyer distinction from the Minnesota State Bar, which recognizes Minnesota lawyers who have provided more than 50 hours of pro bono legal service to the community.



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.

Cozen O’Connor Advises Eurofins Scientific in $175 Million Acquisition of TestAmerica Environmental Services

October 04, 2018

The Corporate and International practices at Cozen O’Connor represented Eurofins Scientific SE in the acquisition of TestAmerica Environmental Services LLC (TestAmerica) from JSTI Group. The transaction is valued at $175 million on a cash-free, debt-free basis. The transaction is expected to close in the fourth quarter of 2018, subject to the fulfillment of regulatory and customary closing conditions.

Cozen O’Connor Guides Eurofins Scientific in $670 Million Acquisition of Covance Food Solutions

May 04, 2018

The Corporate and International practices at Cozen O’Connor represented Eurofins Scientific SE in the acquisition of Covance Food Solutions from Laboratory Corporation of America Holdings (LabCorp).

Eurofins Scientific Acquires EAG Laboratories for $780 Million

December 05, 2017

The national corporate practice and international practice at Cozen O’Connor represented Eurofins Scientific SE in the acquisition of EAG Laboratories from affiliates of Odyssey Investment Partners. The transaction is valued at $780 million on a cash-free, debt-free basis, and closed on December 1, 2017.

Cozen O’Connor Opens Minneapolis Office with the Addition of Eight Lateral Attorneys

June 04, 2013

The firm announced it is opening a Minneapolis office with transactional and commercial litigation attorneys from Hinshaw & Culbertson, LLP. Thomas Wallrich, Steven Silton, Thomas Kane, Peter Crema, Nadia Hasan, Heather Marx, Joel Nesset and Kristi Zentner are all joining the firm as members.


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

Danielle Garno and 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.

Minnesota Human Resources Manual [American Chamber of Commerce]

January 20, 2015

Heather Marx, a member of Cozen O’Connor’s Commercial Litigation Department, and Kristi Zentner, a member in the Business Law Department, co-authored the “Minnesota Human Resources Manual” for the American Chamber of Commerce. This comprehensive human resources manual explains, in plain English, the duties of the employer during the entire employment process – everything from pre-hire through post-termination. It covers more than thirty primary topics and includes practical advice on what should be done, solid advice on how to do it and a complete explanation of why it is important.

The Legal Process of a Damage Suit [Damage Prevention Professional Magazine]

September 01, 2013

Even the best excavation business can cause damage at some point during its operation. While it won’t eliminate the pit that develops in your stomach upon learning that you or your company are the subject of a lawsuit involving a damage incident, knowledge of the litigation process will hopefully move you past the fear of the unknown and directly into addressing (and hopefully resolving) a damage claim.

Social Media and the Workplace: A Technological Balancing Act [Damage Prevention Professional Magazine]

September 01, 2012

Aside from giving us some amazing television moments, this year’s Summer Olympics also brought a spotlight on the now ever-present use of social media.

Essential DO's and DON'Ts of Electronic Evidence Preservation [Damage Prevention Professional Magazine]

September 01, 2011

Whether your company is dealing with a damage claim or facing an investigation by a regulatory agency, one of the issues that must top your checklist to ensure a response that best protects your company is the preservation of electronic evidence.

Tips for Successful Damage Depositions [Damage Prevention Professional Magazine]

June 01, 2011

Despite the best training, equipment, and preparation, it is an inevitable consequence of working in the industry that damages will happen. When they do, and when they cannot be resolved without litigation, the prospect of giving a deposition can strike fear into even the most experienced witness.


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

Awards & Honors

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 2016-2021

  • Minnesota
  • 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

Hennepin County Bar Association

American Bar Association

Minnesota Women Lawyers

American Bankruptcy Institute