Mirja Kühlewind is a researcher at Ericsson Research in Aachen, Germany, focusing in her work on transport protocol evolution. Before that until February 2019, she worked as a Post-Doc at the Networked Systems Group (NSG) of the Computer Engineering and Networks Laboratory at ETH Zurich on topics around Internet measurements and transport protocol design. Mirja received her PhD in 2015 from the University of Stuttgart working in the field of TCP congestion control.

Mirja serves, since March 2020, as Member of the Internet Archiecture Board (IAB), and was chair of the IAB from March 2020 till 2024. Before that she served four years as Area Director (AD) of the transport area; prior to that, she was co-chair of the IETF's RTP Media Congestion Avoidance Techniques (rmcat) and TCP increased security (tcpinc) working groups. She also co-chairs the Measurement and Analysis for Protocols research group (maprg) in the IRTF.