Posternak Blankstein & Lund LLP is now Arent Fox. Read the press release

David M. Barbash

Managing Partner, Boston
David is the Managing Partner of Arent Fox’s Boston office.
David M. Barbash, Arent Fox LLP, Partner

David's diverse practice includes representing public and private companies in mergers and acquisitions, public and private financings, and licensing and strategic alliances. David acts as counsel and advisor to corporate clients, including representing early-stage companies, in a wide range of industries including software, technology, manufacturing, medical devices, and consumer products and services. 

David co-chairs the firm’s Venture Capital & Emerging Businesses Industry Group.

David was previously with Posternak Blankstein & Lund LLP where he was the Immediate-Past Managing Partner. Prior to joining the firm, David was a Partner at Hutchins, Wheeler & Dittmar and a Partner at Nixon Peabody LLP.   

Client Work

  • Advised numerous entrepreneurs in the formation, financing and operation of their early stage businesses.
  • Represented many middle market companies in the sale of their businesses to strategic acquirers and private equity firms.
  • Represents middle market companies in strategic acquisitions and joint ventures.
  • Represented a Massachusetts quasi-governmental agency in numerous investments in the cleantech industry.


  • Boston Bar Association
  • Massachusetts Bar Association
  • American Bar Association

Awards & Recognition

  • Massachusetts Super Lawyer in 2008, 2009, 2010 and every year from 2012-2018
  • Bar & Court Admissions
    • Connecticut Bar
    • Massachusetts Bar
    • New York Bar
  • Education
    University of Virginia School of Law
    Notes Editor of the Virginia Journal of International Law
    Connecticut College
    magna cum laude