The Faculty of Physics has the following job opening:

Research Position (PhD student) (m/f/d)

ID: Wiss26212

• starting: 01.11.2026
• part-time 65 %
• salary according to Remuneration level 13 TV-L
• fixed-term

The position is based in the Theoretical Physics Group at Bielefeld University. The successful candidate will conduct research under the supervision of Dr. Isabel Oldengott as part of the Heinz Maier-Leibnitz Prize. The project focuses on particle cosmology, specifically the investigation of the influence of non-standard properties of neutrinos on the cosmological evolution. Scientific collaboration with the research groups Schwarz, Uhlemann, and Bödeker, as well as the potential affiliation with the Collaborative Research Center (CRC) TR 211 (Strong-interaction matter under extreme conditions), offers broad training in the field of cosmology. The successful candidate will also have the opportunity to further their education through summer schools and conferences. We are seeking a dedicated and motivated researcher who will actively contribute to the scientific progress and management of the group and its activities in collaboration with other members.

Your Tasks

• perform research on the above-mentioned topics (80 %)
• publish the results in scientific journals and present at workshop/conferences (10 %)
• participate in the teaching activities (8%)
participate in the organization of the academic life in the physics department (2 %)
• 
  

Employment is conducive to scientific qualification and provides the opportunity for further academic development.

We offer

• salary according to Remuneration level 13 TV-L
• fixed-term (3 years) (§ 2 (1) sentence 1 of the WissZeitVG; in accordance with the provisions of the WissZeitVG and the Agreement on Satisfactory Conditions of Employment, the length of contract may differ in individual cases)
• part-time 65 %

• internal and external training opportunities
• variety of health, consulting and prevention services
• reconcilability of family and work
• open and pleasant working atmosphere
• exciting, varied tasks

Your Profile

We expect

• completed relevant university degree (master or equivalent) in Physics
• knowledge in cosmology, general relativity, particle physics and astronomy
• programming experience (Python)
• very good knowledge of English (written and spoken)
• good communication skills (written and spoken)
• collaborative and team work abilities
• independent, self-directed and organized style of work

Preferred experience and skills

• familiarity with modern statistical methods in cosmology
• experience with cosmological software packages such as CLASS or CAMB
• experience with cosmological data analysis
• knowledge of cosmological linear perturbation theory

Application Procedure

We are looking forward to receiving your application. To apply, please preferably use our online form via the application button below.

application deadline: 31.07.2026

Contact
Dr. Isabel Oldengott
ioldengott@physik.uni-bielefeld.de

Postal Address
Universität Bielefeld
Fakultät für Physik
Susi v. Reder
Postfach 10 01 31
33501 Bielefeld

Bielefeld University has received a number of awards for its achievements as an equal-opportunity employer and has been recognized as a family-friendly university. The university welcomes applications from women. This is particularly true with regard both to academic and technical posts as well as positions in information technology as well as the skilled crafts and trades. Applications are handled according to the provisions of the state statutes on equal opportunity. Applications from suitably qualified handicapped and severely handicapped persons are explicitly encouraged. At Bielefeld University on request positions can be carried out with reduced working hours as long as this does not conflict with official needs.

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