Barry O'Neil

Nathan Z. Heffernan

Areas of Practice: Business & Corporate, Real Estate, Employment Law, Estates & Trusts, Professional Liability, Litigation 

Office Location: Minneapolis, Minnesota / Hudson, Wisconsin

Direct612.336.9316 / Email: 

Nathan Z. Heffernan / Biography

With four years of judicial clerkship experience, Nathan Heffernan knows how the judicial system works. Nathan received his J.D. at the University of Wisconsin Law School. Prior to joining Lommen Abdo, he served as a judicial intern for Chief Justice Shirley Abrahamson of the Wisconsin Supreme Court, served as law clerk for Judge Shaun Floerke in the Sixth Judicial District of Minnesota, and as an appellate Law Clerk at the Minnesota Court of Appeals for four different judges.

In his practice at Lommen Abdo, Nathan serves clients as a business and corporate lawyer helping clients with every stage of their businesses. From entity formation through exit strategy, Nathan is there to assist with all corporate matters including employment law and real estate.

Nathan also serves clients in estate planning and trust formation. Part of his work includes helping his business clients with proactive succession planning and the development of their personal estate plans.

There are times when professionals face unforeseen liability issues which Nathan is there to help with through the firm’s Professional Liability Practice.

Born and raised in Wisconsin, Nathan is an avid Minnesota sports fan and enjoys cheering on the Gophers, Vikings, and Loons. While Nathan was a history major at the University of Minnesota, he studied abroad at Trinity College in Dublin and wrote his major thesis on the Irish potato famine. Nathan lived in Duluth for two years before coming back to the Twin Cities.

When he’s not practicing law, he enjoys spending time at his family’s cabin on the Brule River in northern Wisconsin.

Leadership + Activities

  • Minnesota State Bar Association 
  • State Bar of Wisconsin


  • University of Minnesota, B.A., 2014 
  • University of Wisconsin Law School, J.D., cum laude, 2018

Bar Admissions

  • Minnesota, 2022 
  • Wisconsin, 2019

News + Articles

List of Lommen Abdo’s Best Lawyers Unmasked

List of Lommen Abdo’s Best Lawyers Unmasked

Lommen Abdo is proud to have increased the number of its lawyers included in the latest edition of The Best Lawyers in America© – especially in the midst of a pandemic.  One additional Lommen Abdo attorney has been included in the 2021 edition of Best Lawyers: One to...

When CAN You Speak to a Represented Party?

Barry O'Neil and Michelle Kuhl presented a webinar on June 12, 2020 through the Hennepin County Bar Association's Professionalism and Ethics Section on "When CAN You Speak to a Represented Party?"   Overview: Rule 4.2 of the Minnesota Professional Rules of...

Civil Litigation Q&A with Barry O’Neil:

What issues come up most in employment law litigation? [Transcript]   What rights do minority shareholders have in a shareholder dispute? [Transcript] What is the first thing a business should do if served with a commercial litigation lawsuit? [Transcript]  ...