The Responsible Internet
The Internet as we know it is largely a black box: a myriad of operational decisions is taken without end-users knowing how their data is treated in transit, what security the operators on an Internet path provide against attacks, what dependencies operators have on other operators, or what jurisdictions traffic passes. The Responsible Internet is an extension of current Internet technology that provides three vital properties for operators and users: transparency, accountability, and controllability.

The positions advertised here are two of seven PhD positions in the CATRIN project, a national effort funded by the Dutch Research Council (NWO) as part of the national research agenda.

Your research with us
We are advertising for two PhD positions that work on closely related aspects of the technical realization of the Responsible Internet, concretely the so-called Network Information Plane and the Network Control Plane:

  • The research of one PhD student will focus on the data structures and algorithms required to capture and disseminate measurement results and the determined properties of networks and systems at Internet scale.
  • The objective of the second PhD project is to investigate, design, prototype, and evaluate scalable network-level mechanisms that address the balance between transparency and security.

The PhD students are also expected to work with PhD students from other sciences in the context of this project.

The prospective PhD candidates will be supervised by Assoc Prof Dr Ralph Holz, Prof Cristian Hesselman, and Asst Prof Dr Mattijs Jonker. The candidates will be appointed for a period of four years, at the end of which they will deliver their PhD theses. During this period, the PhD students will have the opportunity to broaden their knowledge by joining international exchange programmes, following courses (30 EC in total) as part of the UT’s doctoral education program, to participate in national and international conferences and workshops, and to visit other research institutes and universities world-wide.

Starting date
As soon as possible.

We are an equal opportunity employer and value diversity and inclusion. We encourage applications regardless of personal background.


  • You have an MSc degree (or comparable) in computer science, electrical engineering, or similar; applications from students who are about to finish their MSc degree studies will be considered as well;
  • You have a background in Internet security and/or Internet measurement, or you have the background to acquire the relevant knowledge independently;
  • You are interested in empirical work;
  • You have a creative mindset and excellent analytical and communication skills;
  • You have good team spirit and like to work in an interdisciplinary and internationally oriented environment;
  • You are proficient in English (C1 or better);
  • Of advantage: experience working with researchers from other disciplines (e.g., social sciences, economics) and an ability to express your thinking for audiences outside of computer science.


  • As a PhD student at UT, you will be appointed to a full-time position for four years, with a qualifier in the first year, within a very stimulating and exciting scientific environment;
  • The University offers a dynamic ecosystem with enthusiastic colleagues;
  • Your salary and associated conditions are in accordance with the collective labour agreement for Dutch universities (CAO-NU);
  • You will receive a gross monthly salary ranging from € 2.541,- (first year) to € 3.247,- (fourth year);
  • There are excellent benefits including a holiday allowance of 8% of the gross annual salary, an end-of-year bonus of 8.3%, and a solid pension scheme;
  • A family-friendly institution that offers parental leave (both paid and unpaid);
  • You will have a training programme as part of the Twente Graduate School where you and your supervisors will determine a plan for a suitable education and supervision;
  • We encourage a high degree of responsibility and independence while collaborating closely with colleagues and other researchers nationally and internationally.


Are you interested in being part of our team and kick-starting the Responsible Internet? Please submit your application no later than 14 August 2022 23:59 CET via the ‘Apply now’ button below and include:

  • A short motivation letter (1-2 pages), emphasizing your specific interest and motivation to apply. Please indicate which of the positions you are applying for. It is possible to apply for both simultaneously.
  • A detailed CV, including any publications if applicable, academic awards, and your working experience.
  • An academic transcript of your BSc and MSc education (or equivalent), including grades.
  • A short description (1/2 page) of your MSc thesis/final project and a link to the thesis work/project report.

Our process: after assessing all applications, we may request the long-listed candidates to upload a 2-minute video, in which candidates are expected to provide their background and motivation for applying. Next, short-listed candidates will be invited to two interviews, one of which is a scientific presentation on their work.

For further questions, please contact Assoc Prof Dr Ralph Holz at


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