He teaches Internet public policy in MIT's Computer Science Department.

His research includes development of accountable systems architectures to enable the Web to be more responsive to policy requirements.

He served as the Deputy Chief Technology Officer of the United States from 2011 to 2012, where he focused on Internet policy and privacy.

[1] During his tenure as a White House technology official, he oversaw a consumer privacy initiative[2] and was primarily responsible[3] for the creation of the Consumer Privacy Bill of Rights[4] and the OECD Internet Policymaking Principles[5] Weitzner and several colleagues wrote the Information Accountability paper, which proposed an alternative approach to information policy where individuals and institutions determine for themselves the way information about them is used lawfully and appropriately by others.

[7] He facilitated discussions and workshops on technology issues such as artificial intelligence (AI)[8] and encryption.