WG Chair Biographies

Moritz Müller is a research engineer at SIDN, the registry of the Dutch ccTLD where he started in 2015. There, he works for the research department, SIDN Labs, carrying out studies on all things related to the DNS, DNSSEC and domain name abuse. Among others, he studied the first Root KSK rollover, DNSSEC key rollovers in general, and the deployment of future quantum-safe algorithms in DNSSEC. At the same time, he develops solutions with the goal to detect malicious domain names and to support domain name abuse analysts.

Since 2017, Moritz is a guest researcher at the University of Twente in the Netherlands at the Design and Analysis of Communication Systems (DACS) group. He defended his PhD thesis titled "Making DNSSEC Future Proof" in 2021. In the same year, he joined the DNS Working Group as co-chair.

Originally from Southwest Germany, Moritz is living in the Netherlands since 2014.

Yevheniya Nosyk is a Cybersecurity Researcher at KOR Labs, where she explores all aspects of the Domain Name System — technical, policy-related, and operational. She is passionate about network measurements and spends her days uncovering how the Internet really works. 

With an academic background, she engages with the broader network operators community to ensure her research aligns with the operational reality.

She earned her Ph.D. in Computer Science from Université Grenoble Alpes in 2024.

Ulrich Wisser is ICANN’s Technical Engagement Manager for Europe. His main role is to support ICANN’s technical engagement efforts in the region (trainings, promote DNS standards and best practices, promote research, …). Ulrich’s professional career prior to joining ICANN included a 15-year tenure at the Foundation for Internet Infrastructre, the Swedish ccTLD (.SE) registry.

He is a 4th degree black belt and licensed judo instructor.