Henning Schulzrinne architects, designs, models, and evaluates Internet protocols and applications, with a particular focus on real-time and embedded applications. He has been working on voice-over-Internet protocols that now power voice communications for modern mobile phones, enterprise, consumer, and public safety applications.

From 2010 through 2019, he has been advising the US Federal Communications Commission (FCC), including in his former role as FCC Chief Technologist, on public safety, enabling communications for people with disabilities, the Open Internet, cybersecurity, network measurements, and preventing robocalling. From 2019 to 2020, he served as a Technology Fellow in the office of Senator Ron Wyden, advancing efforts on protecting data against illegal searches, improving broadband availability for rural and low-income households, and preventing identity theft.

Schulzrinne and his team have developed the Session Initiation Protocol (SIP), the Real-Time Transport Protocol (RTP), and other multimedia signaling and support protocols that are used in the 3GPP, CableLabs, NENA NG911 (for emergency calls), and other system standards to support VoIP and multimedia streaming applications. Most recently, he has been working on automating the diagnostics of Internet network faults, protecting the electric grid against cyber-attacks, and scaling up the Internet of Things.

Schulzrinne received his undergraduate education at the Technical University of Darmstadt, Germany, his MSEE at the University of Cincinnati, and a Ph.D. in Electrical Engineering from the University of Massachusetts, Amherst, in 1992. He is a Fellow of the IEEE and ACM.