John Hahn

Mayer Brown

John S. Hahn’s practice encompasses a variety of high-stakes environmental counseling and litigation matters. These have involved defense against federal and state enforcement actions and challenges to rulemaking authority, as well as private-sector disputes over contaminated sites and issues of successor liability.

He has extensive experience with environmental challenges to real estate development and the allocation of environmental liabilities in corporate and real estate transactions. John is recognized by Chambers USA for Environmental Law.

John received the Oak Leaf Award from The Nature Conservancy in 1991 for his pro bono work in support of TNC’s conservation projects.

John has been appointed Special Master for In Re: Dicamba Herbicides Litigation, US District Court, EDMO, consolidated multi-district litigation involving claims arising out of the application of dicamba and the sale of dicamba-resistant seed (appointed June 2018).

Education :

  • Yale Law School, JD
  • Duke University, AB, magna cum laude

Admissions :

  • District of Columbia
  • North Carolina
  • US Court of Appeals for the District of Columbia Circuit
  • US District Court for the District of Columbia
  • US District Court for the Middle District of North Carolina
  • US Court of Appeals for the Federal Circuit
  • US Court of Appeals for the Fourth Circuit

Activities :

  • Federalist Society for Law and Public Policy Studies
  • Board of Visitors (Emeritus), Nicholas School of the Environment, Duke University
  • NC Bar Association, Environment, Energy & Natural Resources Law Section, Co-Chair Agriculture Law Committee; Judicial Independence Committee
  • American Agricultural Law Association


Rate : $$$

What types of cases Attorney John Hahn & Mayer Brown can handle?
Mayer Brown can handle cases related to laws concerning Litigation, Government, Energy Utilities & Environmental. We manually verify each attorney’s practice areas before approving their profiles and reviews on our website.
Where is Mayer Brown located?
Mayer Brown is located at 1999 K St NW, Washington, DC 20006, USA. You can reach out to Mayer Brown using their phone line 202.263.3346. You can also check their website or email them at [email protected].
How much would it cost to hire Mayer Brown?
John Hahn lawyer charges are specific to each case. However, they work with contingency fees and its ranges from $$ to $$$. They also provide free consultation [and no obligation quotes] if you are interested to hire.
Are John Hahn reviews trust-able?
We have the ratings and reviews moderation team who checks and verifies every review submitted on our website manually. You can trust all the reviews you see on John Hahn lawyer profile listing.

Rate and write a review

Your email address will not be published. Required fields are marked *

Is this your profile?Claim it now.

Make sure your information is up to date.
Mayer Brown
1999 K St NW, Washington, DC 20006, USA
Get directions

Brian Orlow

Main Street 71-18
11367 NY US

Lina Stillman

Broadway 42
New York 10006 NY US