Mark is a nationally recognized litigator and trial lawyer whose practice spans a wide range of cutting-edge technology matters and high-stakes commercial disputes. His successful representation of corporations, financial firms, government entities and individuals has earned him recognition in Chambers USA, The Best Lawyers in America, Benchmark Litigation, Super Lawyers and other publications. A former federal prosecutor, he is also an accomplished criminal defense lawyer who has represented clients in virtually every type of white collar investigation.

In the technology sector, Mark has established the country’s leading practice devoted to representing companies and government entities facing the business disruption and financial losses caused by failed implementations of Enterprise Resource Planning (“ERP”) business software.  He has become the counsel of choice for companies, states and municipalities seeking to obtain recovery from consulting firms and software providers in connection with mission-critical software projects plagued by delayed or disastrous go-lives, skyrocketing costs, deficient project management, missing functionality, excessive customization, defective interfaces and other problems.  For his ground-breaking work helping clients navigate through botched implementations and recover against software vendors, Mark has been named a National Law Journal Litigation Trailblazer and a Financial Times Innovative Lawyer.

Mark was an Assistant U.S. Attorney in the Eastern District of New York, where his notable prosecutions included corruption charges against an SEC attorney, insider trading charges against a celebrity CEO, securities fraud charges against an investment banker Fortune magazine dubbed the "Hannibal Lecter of Wall Street" and racketeering trials against some of New York's most feared drug and murder-for-hire gangs. Mark was twice awarded the Justice Department's Director's Award for Superior Performance, and was chosen as the Federal Law Enforcement Foundation's "Prosecutor of the Year."

Mark has served on the Judiciary Committee of the New York Bar Association, where he assisted in evaluating all federal and state judges and prospective judges in New York. He has also been consulted by and quoted in the New York Times, the Wall Street Journal, CNBC, Business Week, Fortune, USA Today and other publications concerning the tech industry, software snafus, trial strategy and criminal law.