Jon Lubin serves as General Counsel at Keller Postman LLC, where he is responsible for oversight of the firm's legal affairs and provides advice to firm management on legal strategies and solutions.

Jon is also General Counsel at Gerchen Capital Partners, where he supervises legal matters relating to its business activities and operations.

Jon previously served as Principal and Counsel at MHR Fund Management, a registered investment adviser and manager of approximately $5 billion in assets using a private equity approach to investing in special situations. At MHR, Jon served on the firm’s investment team where he negotiated, structured, and consummated complex transactions across a wide variety of sectors and asset classes.

Prior to MHR, Jon was an Associate at Debevoise & Plimpton where he represented private equity fund sponsors, investment advisory firms, and corporations in connection with acquisitions, financings, and other extraordinary business activities. While at Debevoise, Jon co-authored several chapters of Practising Law Institute’s Health Care Mergers & Acquisitions Answer Book.

Jon earned his law degree from Yale Law School. He received his bachelor’s degree in economics and classical studies from the University of Pennsylvania where he graduated summa cum laude and was elected to Phi Beta Kappa.

Jon is licensed to practice law in New York only.


  • J.D., Yale Law School
  • B.A., University of Pennsylvania

Previous Affiliations

  • MHR Fund Management LLC
  • Debevoise & Plimpton LLP