Mark J. Wishner - Greenberg Traurig, LLP

Mark J. Wishner

Listed in Best Lawyers since 2012
Phone: 703-749-1352

Mark J. Wishner has more than 30 years of securities and corporate transactional experience. Mark's practice encompasses public and private securities offerings, domestic and cross-border mergers and acquisitions, SPACs, leveraged buyouts, private investor representations, corporate governance, restructurings and SEC reporting and compliance matters. Since 2004, Mark has led transaction teams in transactions having a value in excess of $3 billion. Mark has wide-ranging industry experience in  information technology, government services and biotechnology and has been listed in Chambers USA as a leading corporate attorney in Northern Virginia.

University of PittsburghBA 1972American University Washington College of LawJ.D. 1975
Committee for the Campaign for George Mason University StudentsGeorge Mason University School of Information Technology and Engineering

Case History

Areas of Concentration
  • Public and private securities offerings
  • Mergers and acquisitions
  • Corporate governance
  • Securities law compliance
  • Strategic alliances
  • Venture capital financings
  • Private equity transactions


Significant Representations
  • Engineering Solutions and Products, Inc. in connection with its leveraged buy-out by Berkshire Partners.
  • KRU Medical Ventures, Inc. in the sale of its managed dialysis centers to DaVita Corporation.
  • Centra Technology, Inc. in connection with its acquisitions of Socio-Cultural Intelligence Analysis, Inc., Courage Services Inc. and Strategic Solutions Unlimited, Inc.
  • Online Resources Corporation in its initial and follow-on public offerings.
  • N.E.W. Customer Service Companies, Inc. in its leveraged buyout by Berkshire Partners.
  • SouthPeak Interactive Corporation in becoming a public company through its business combination with  a publicly traded special purpose acquisition corporation.
  • Online Resources Corporation in its acquisition of Princeton eCom Corp. 
  • Speedy Cash. with its reorganization and private equity transaction with Friedman, Fleischer & Lowe. 
Part 2
  • Mercator Partners Acquisition Corp., a publicly-traded special purpose acquisition corporation, in its acquisitions of Global Internetworking, Inc. and European Telecommunications and Technology Limited. 
  • Baran Group, Ltd. of Israel in its stock for stock acquisition of 02wireless Solutions, Inc and listing on the NASDAQ Stock Market. 
  • Online Resources Corporation in its acquisition of Internet Transaction Solutions, Inc.
  • Checksmart Financial Holdings, Inc. in its reorganization and leveraged buyout to Diamond Castle Partners.
  • N.E.W. Customer Service Companies, Inc. in its leveraged buyout by T.H. Lee Putnam Ventures and Freeman Spogli and in its leveraged recapitalizations.
  • Cellomics, Inc. in its acquisition by Fisher Scientific International Inc. 
  • Apptis Holdings, Inc. in its private equity transaction with New Mountain Capital.
  • Apptis Holdings, Inc. in its acquisition of SETA Corporation.
  • Representation of companies primarily in the government information technology and biotechnology sectors.

Client Comments

"Mark is a "renaissance man" in the truest sense of the word. He has developed expertise in a wide range of legal disciplines (corporate, securities, accounting, bankruptcy, and litigation), and is able to combine and assimilate his knowledge across the spectrum and apply it to each problem he encounters. He has a natural curiosity that drives him to find the root cause of an issue, and the determination to take it to its conclusion. And he is driven by an overriding passion about his clients and his profession."

-Michael Bisignano
Online Resources Corporation

"Mark Wishner is a consummate professional and I greatly value his input and trust him with business dealings. I am grateful to have found a lawyer who goes above and beyond in my mind to understand the business, act in the best interest of the company, and offer sound, excellent advice."

-Chris C. Andersen
CFO, SVP
NJVC, LLC

Office Location

1750 Tysons Boulevard, Suite 1000
McLean, VA 22102
United States


Practice Areas

Corporate Law