Rotenberg is a founding board member and former chair of the Public Interest Registry, which manages the .ORG domain.

In 2020, CAIDP published "Artificial Intelligence and Democratic Values," the first comparative review of national AI policies and practices.

EPIC was involved with a wide range of civil liberties, consumer protection, and human rights issues.

EPIC prevailed in significant Freedom of Information Act cases against the CIA, the DHS, the Dept.

[9] One of EPIC's cases concerned the obligation of the Federal Aviation Administration to establish privacy regulations prior to the deployment of commercial drones in the United States.

[10] In 2017, EPIC launched a project on Democracy and Cybersecurity to determine the extent of Russian interference with the 2016 Presidential election and to prevent future attacks on democratic institutions.

EPIC charged that the commission had failed to undertake a privacy impact assessment, required by law.

Under court order resulting from EPIC's case, the White House subsequently deleted the voter data that was wrongfully obtained.

Marc subsequently filed a 76-page complaint in Federal District Court against The Protocol and POLITICO, the parent company.

[14] In support of his claims, he cited an opinion of future Supreme Court Justice Kentanji Brown Jackson.

Marc Rotenberg has helped establish several organizations that promote public understanding of computer technology and encourage civil society participation in decisions concerning the future of the Internet.

He is a Life Fellow of the American Bar Foundation, a Life Member of the Council on Foreign Relations, a Sustaining Member of the European Law Institute, and the recipient of several awards, including the Norbert Wiener Award for Social and Professional Responsibility, the American Lawyer Top Lawyers Under 45, and the Vicennial Medal (2012) for distinguished service from Georgetown University.

Marc is married to Anna Markopoulos Rotenberg, a former economist and now ESL teacher in the District of Columbia and Alexandria Public Schools.