As Chief Technologist, Henning is based in OSP but is an advisor to the Chairman on technology issues. He is here on leave from Columbia Univ., where he is a professor in the Fu Foundation School of Engineering. He previously served as the agency's Chief Technologist from 2011 to 2014, at which time he left the FCC but continued as a part-time technology adviser. In late 2016, he returned to the FCC as Chief Technologist.
Henning is widely known for the development of key protocols that enable VoIP and other multimedia applications which are now Internet standards, including the Session Initiation Protocol. He has published more than 250 journal and conference papers and more than 70 Internet Requests for Comment (RFCs). Henning holds an undergraduate degree in economics and electrical engineering from the Darmstadt Univ. of Technology (Germany), an MSEE degree (as a Fulbright scholar) from the Univ. of Cincinnati, and a PhD from the Univ. of Massachusetts.