Curriculum Vitae
doc. Ing. Tomáš Čejka, Ph.D. — CESNET & Faculty of Information Technology, CTU in Prague
Research interests: network security, anomaly detection, network traffic monitoring, machine learning, large language models.
Professional experience
- 2025 – presentHead of Department, Dept. of Tools for Administration and Security, CESNET, a.l.e.
- 2015 – 2025Research Team Leader, CESNET
Development of a modular distributed system for network traffic analysis and anomaly detection (NEMEA).
- 2014 – 2015Software Developer, CESNET
OF-CONFIG support for configuration of Open vSwitch (Open Networking Foundation project).
- 2011 – presentResearcher, CESNET
Tools for network traffic analysis and anomaly detection (NEMEA); Netopeer configuration system; COMbo Ethernet Tester software.
Academic positions
- 2024 – presentAssociate Professor (doc.), Faculty of Information Technology, CTU in Prague, Department of Digital Design
- Founder of the Network Traffic Monitoring Laboratory (NETMON)
Research laboratory and student team focused on network security and high-speed traffic analysis, in long-term cooperation with CESNET.
- 2024 – 2026Member of the Academic Senate, FIT CTU in Prague
See also Teaching and Supervision.
Education
- 2024Habilitation (doc.), Czech Technical University in Prague, FIT
Habilitation thesis: “High-Speed Network Traffic Monitoring Supporting Machine Learning”
- 2018Ph.D., Czech Technical University in Prague, FIT
Dissertation: “Stream-wise Parallel Anomaly Detection in Computer Networks”; supervisor doc. Ing. Hana Kubátová, CSc.
- 2012Ing. (MSc.), Czech Technical University in Prague, FIT
Thesis: “Control software for the COMbo Ethernet Tester and its integration into the Netopeer configuration system”; supervisor RNDr. Radek Krejčí (CESNET)
- 2010Bc. (BSc.), Czech Technical University in Prague, Faculty of Electrical Engineering
Awards
- 2026Best Reviewer Award, International Conference on Network and Service Management (CNSM)
- 2023Best Paper Award, IEEE Annual Computing and Communication Workshop and Conference (CCWC)
J. Pešek, D. Soukup, T. Čejka: Active learning framework for long-term network traffic classification.
- 2022Best Paper Award, International Conference on Network and Service Management (CNSM)
L. Melcher, K. Hynek, T. Čejka: Tunneling through DNS over TLS providers.
- 2020Best Paper Award, IEEE Annual Information Technology, Electronics and Mobile Communication Conference (IEMCON)
K. Hynek, T. Čejka: Privacy illusion: Beware of unpadded DoH.
- 2019Josef Hlávka Award, Josef, Marie and Zdeňka Hlávka Foundation
- 2017Stanislav Hanzl Foundation Award
For studies, research results and related activities at FIT CTU in Prague.
Service to the community
Programme and organizing committees
- 2026TPC member, International Conference on Network and Service Management (CNSM)
- 2026TPC member, IEEE International Conference on Future and Intelligent Networking (FINE)
- 2025Workshop Co-Chair, CNSM 2025, Prague
- 2024Local Organizing Committee member, CNSM 2024, Prague
- 2024TPC member, IEEE/IFIP Workshop on Quality of Data in Network Telemetry (QoDaNeT), co-located with IEEE/IFIP NOMS 2024
- 2017 – 2022TPC member, Prague Embedded Systems Workshop (PESW)
Journal reviewer: Computer Networks · Computers & Security · IEEE Transactions on Network and Service Management · IEEE Transactions on Dependable and Secure Computing · IEEE Communications Magazine · IEEE Transactions on Consumer Electronics · Microprocessors and Microsystems · Journal of Information Security and Applications · ICT Express · Infocommunications Journal
Academic committees and reviews
- 2026Reviewer of a habilitation thesis, University of Hradec Králové
- 2025Book reviewer, “AI na hraně: Implementace Edge AI do embedded systémů prakticky” (in Czech)
- 2025Chair of the committee, doctoral debate
- 2024 – 2025Member of state doctoral examination committees, Brno University of Technology
- 2024Member of a dissertation defence committee, Brno University of Technology