ZwillGen Announces Major Expansion

WASHINGTON, D.C., August 15, 2013 – ZwillGen is thrilled to announce that three new attorneys have joined the firm. Veteran attorneys Stacey Brandenburg and Mason Weisz will be joining as Counsel, and Dan Sachs has been appointed as ZwillGen’s first Fellow. Marc Zwillinger, ZwillGen’s Founder said, “We are thrilled to be adding such experienced attorneys to our firm to help support our increasing privacy counseling and FTC work. We are also very excited about our new ZwillGen fellowship program and hope it becomes a very successful bridge to practice for young talented privacy attorneys.” Zwillinger commented further that “We are also eagerly awaiting our move to new office space at 1900 M Street in Washington, D.C. on January 1, 2014 and finding new office space to accommodate the growth of the New York office.”

Stacey Brandenburg, a veteran of the FTC’s Division of Privacy and Identity Protection, advises clients on a wide range of privacy and data security issues, including information security programs, responses to data and cybersecurity breaches, and compliance with privacy rules. While at the FTC, Stacey handled emerging issues such as online behavioral advertising and identity management, and investigated data breaches and violations of Section 5 of the FTC Act. Stacey is also on faculty at American University Washington College of Law where she explores ways that businesses can handle privacy issues related to e-commerce, social media, and the Internet. Stacey said, “I am very excited to be joining Zwillgen’s cutting-edge practice and premier team of attorneys. I look forward to adding my experience and expertise in order to help clients navigate the important privacy and data security issues that they face.”

Mason Weisz joins ZwillGen from the Hunton & Williams LLP privacy team. He will be expanding ZwillGen’s New York office with Ken Dreifach, with whom he served in the Office of the New York Attorney General’s Internet Bureau earlier in his career. Mason’s broad-based privacy practice focuses on complex privacy issues in rapidly evolving industries. As a former computer programmer and web designer, he has extensive experience with issues relating to the Internet, digital media, e-commerce and new technology. He brings an international perspective to his work, having spent years working with clients on multinational projects. He was selected as a “Rising Star” by New York Super Lawyers in 2011 and 2012. Mason commented, “It is an honor to work with the ZwillGen team to help the most cutting-edge companies resolve the most pressing privacy issues of our day.”

Dan Sachs, a recent graduate of George Washington University Law School, will be joining ZwillGen as a Fellow. Prior to joining ZwillGen, Mr. Sachs worked at Facebook, in its Washington DC office, where he reported to the Chief Privacy Officer for Policy. He also served as a research assistant to Professor Jeffrey Rosen, focusing on consumer privacy and surveillance issues. Mr. Sachs was a Legal Intern with ZwillGen in the summer of 2012. “This is an exceptional legal team and I’m thrilled to be back,” he said.

About ZwillGen (

ZwillGen is a specialized boutique that represents the biggest names in technology in their most complex and cutting edge legal challenges. ZwillGen is known as a leading firm on Internet law and its lawyers have investigated, litigated and counseled clients on a wide range of Internet issues including cybercrime, information security, privacy, authentication and identity, surveillance, subpoena compliance, online marketing, behavioral advertising, Internet gambling, satellite and videogame piracy, and intellectual property theft. ZwillGen now has 13 attorneys in 4 cities.