Welcome! Thanks a lot for agreeing to provide a reference for me.

How to use: Each entry below corresponds to an individual application for which separate action needs to be taken by the referee. Generic letters for platforms such as Academic Jobs Online or Interfolio, are not included here and will be negotiated separately by an email exchange. The applications are sorted in reverse chronological order, with the most recent ones first. You may wish to scroll the page to check whether you’ve missed anything, especially since notification for the earlier letters was handled by piecemeal emails.

Policy on tuning: Due to the number of applications, feel no pressure to tune each letter beyond the addressee, etc. That said, the applications are ranked/colored by importance. For more important applications, if you have time and energy in your busy schedule, I would be grateful for more tailored letters. If something special is called for, it is detailed in the notes and will be accompanied by additional email instructions.

If you miss a deadline: No worries! If you are able to let me know via email, however, that would be greatly appreciated.

Importance of this letter: 5/9 NEW
Deadline: 2026-02-05
Regarding: Visiting Professor in Astrophysics, Cosmology, and Gravitation at UFES
Submission instructions: Prof. Valerio Marra (applications.ppgcosmo@cosmo-ufes.org)
Subject: Reference letter for Dr. Will Barker - Visiting Professor position at UFES
Link for tuning: Job Posting
Importance of this letter: 5/9 NEW
Deadline: 2026-02-05
Regarding: Postdoctoral Position in High-Energy Physics and Cosmology at Sun Yat-sen University
Submission instructions: Hao-Lin Li (lihlin68@mail.sysu.edu.cn)
Subject: Reference letter for Dr. Will Barker - Postdoctoral position at Sun Yat-sen University
Link for tuning: Job Posting
Importance of this letter: 5/9 NEW
Deadline: 2026-02-05
Regarding: Tenure-track Research Associate Professor at IHEP, Chinese Academy of Sciences
Submission instructions: Ms. Li Chen (chenli@ihep.ac.cn)
Subject: Reference letter for Dr. Will Barker - Research Associate Professor position at IHEP
Link for tuning: Job Posting
Importance of this letter: 5/9
Deadline: 2025-12-25
Regarding: Postdoctoral positions in theoretical physics at the "Service de Physique Théorique" at the Université Libre de Bruxelles (ULB)
Submission instructions: Prof. Thomas Hambye (physthulb@gmail.com)
Subject: Reference letter for Dr. Will Barker
Link for tuning: Job Posting
Notes: A separate notification was sent on 2025-10-15. The deadline is an estimate.
Importance of this letter: 5/9
Deadline: 2025-12-25
Regarding: Postdoc to develop large-scale foundation models, aiming for powerful, interpretable and open-access models to answer fundamental scientific questions in astrophysics, particle physics and cosmology. Hosted at a collaborative network which includes researchers from astrophysics, cosmology and particle physics in Aachen, Heidelberg, Hamburg and Munich.
Submission instructions: Invitation link will be sent via email
Link for tuning: Job Posting
Notes: A separate notification was sent on 2025-10-18. The deadline is an estimate. You will be invited to submit your letter directly to the application portal, and not by me.
Importance of this letter: 9/9
Deadline: 2025-12-05
Addressee: Aishik Ghosh, Assistant Professor of Physics at Georgia Tech
Regarding: Postdoc in AI for fundamental physics (theory or statistical inference / experiment)
Submission instructions: Invitation link will be sent via email
Link for tuning: Job Posting
Notes: The PI initiates contact at their discretion. The deadline reflects the estimated submission date.
Importance of this letter: 8/9
Deadline: 2025-12-01
Addressee: Search Committee, Fundamental Physics, 2575 Sand Hill Road, Menlo Park, CA 94025
Regarding: Associate Scientist - AI and Fundamental Physics
Submission instructions: Invitation link will be sent via email
Link for tuning: Job Posting
Notes: The Search Committee initiates contact at their discretion. The deadline reflects the estimated submission date.
Importance of this letter: 9/9
Deadline: 2025-12-01
Addressee: Search Committee, Department of Physics, Case Western Reserve University Rockefeller Bldg. 2076 Adelbert Rd. Cleveland, OH 44106
Regarding: 27th Annual MICHELSON POSTDOCTORAL PRIZE LECTURESHIP
Submission instructions: Invitation link will be sent via email
Link for tuning: Job Posting
Notes: This is not a position: the winner will spend one week in residence at Case Western and deliver 2 technical lectures and a colloquium. The letters should address the nominee’s scientific accomplishments, promise, and ability to communicate effectively.
Importance of this letter: 8/9
Deadline: 2025-12-01
Addressee: Faculty Search Committee, UNC Physics & Astronomy 120 E. Cameron Ave., Phillips Hall CB3255, Chapel Hill, NC 27599
Regarding: Assistant Professor of Theoretical High-Energy Physics
Submission instructions: Invitation link will be sent via email
Link for tuning: Job Posting
Importance of this letter: 5/9
Deadline: 2025-12-01
Addressee: Faculty Search Committee, Department of Physics at The University of Texas at Austin, 2515 Speedway, C1600 PMA 5.208
Regarding: Assistant Professor in Cosmology
Submission instructions: Invitation link will be sent via email
Link for tuning: Job Posting
Importance of this letter: 9/9
Deadline: 2025-12-01
Addressee: Showni Medlin-Crump, 401 Nielsen Physics Building, 1408 Circle Drive, Knoxville, TN 37996-1200
Regarding: Assistant Professor - Computational Astrophysics
Submission instructions: Invitation link will be sent via email
Link for tuning: Job Posting
Notes: Invitation emails sent on 2025-11-26.
Importance of this letter: 8/9
Deadline: 2025-12-01
Addressee: Faculty Search Committee, MIT Department of Physics, 77 Massachusetts Avenue, Building 4, Room 304, Cambridge, MA 02139
Regarding: Assistant Professor, Artificial Intelligence and Physics
Submission instructions: Invitation link will be sent via email
Link for tuning: Job Posting
Notes: Letter upload links sent on 2025-11-26.
Importance of this letter: 7/9
Deadline: 2025-12-01
Addressee: Tel Aviv University, P.O. Box 39040, Tel Aviv 6997801, Israel
Regarding: Faculty Position in High-Energy Physics
Submission instructions: Invitation link will be sent via email
Link for tuning: Job Posting
Notes: Invitation links sent on 2025-11-26.
Importance of this letter: 8/9
Deadline: 2025-12-01
Addressee: Selection Committee, Caltech 452-48, 1200 E California Bl., Pasadena CA 91125
Regarding: Heising-Simons Fellows in Quantum Gravity
Submission instructions: Invitation link will be sent via email
Link for tuning: Job Posting
Notes: Invitation links sent on 2025-11-26.
Importance of this letter: 9/9
Deadline: 2025-11-30
Addressee: Selection Committee, ICCUB ADMINISTRATIVE OFFICE, Office 500, Physics Faculty, 5th floor, Martí i Franquès, 1, 08028 Barcelona, Tel: +34 93 402 15 88
Regarding: Postdoctoral Positions + ICCUB Fellowship
Submission instructions: Invitation link will be sent via email
Link for tuning: Job Posting
Notes: Invitation links sent on 2025-11-26.
Importance of this letter: 4/9
Deadline: 2025-11-30
Addressee: Faculty Selection Committee, Rumelifeneri Yolu 34450, Sarıyer, İstanbul / TR
Regarding: Tenure-track Faculty Position in Physics
Submission instructions: Invitation link will be sent via email
Link for tuning: Job Posting
Notes: Invitation links sent on 2025-11-26.
Importance of this letter: 5/9
Deadline: 2025-11-26
Addressee: Selection Committee, Department of Physics, Universite de Montreal, Complexe des sciences, 1375 Avenue Therese-Lavoie-Roux, Montreal (Quebec) H2V 0B3
Regarding: Assistant professor position in theoretical particle physics
Submission instructions: Professor Nicole St-Louis (nicole.st-louis@umontreal.ca)
Subject: Reference letter for Dr. Will Barker - Assistant professor position in theoretical particle physics
Link for tuning: Job Posting
Notes: A separate notification was sent on 2025-11-21. The deadline is an estimate.
Importance of this letter: 6/9
Deadline: 2025-11-20
Addressee: Search Committee, Department of Physics and Astronomy, University of Mississippi, MS 38677 USA
Regarding: Assistant Professor of Physics and Astronomy
Submission instructions: Search Committee (hepsearch@phy.olemiss.edu)
Subject: Reference letter for Dr. Will Barker - Assistant Professor of Physics and Astronomy
Link for tuning: Job Posting
Notes: A separate notification was sent on 2025-11-14. The deadline is an estimate.
Importance of this letter: 5/9
Deadline: 2025-11-15
Addressee: Jennifer Smith, Department Administrator, Department of Astronomy & Astrophysics, The University of Chicago, 5640 S. Ellis Ave, ERC 599, Chicago, IL 60637
Regarding: KICP postdoctoral fellowship programme
Submission instructions: Jennifer Smith (jmsmith@uchicago.edu)
Subject: KICP Fellowship search/Will Barker
Link for tuning: Job Posting
Notes: A separate notification was sent on 2025-11-04.
Importance of this letter: 9/9
Deadline: 2025-11-12
Regarding: Academy Research Fellowship
Link for tuning: Job Posting
Notes: These were not reference letters, but rather public letters of collaboration, which were negotiated separately with each referee.
Importance of this letter: 4/9
Deadline: 2025-10-20
Regarding: Assistant professorship at the University of Tokyo, in the Research Center for the Early Universe (RESCEU)
Submission instructions: Prof. Toshikazu Shigeyama (toiawase@resceu.s.u-tokyo.ac.jp)
Subject: Reference letter for Dr. Will Barker - Assistant Professor position at RESCEU
Link for tuning: Job Posting
Notes: A separate notification was sent on 2025-10-15. The deadline is an estimate.
Importance of this letter: 4/9
Deadline: 2025-10-20
Regarding: Assistant professorship at the Bar Ilan Center for Computational Astrophysics
Submission instructions: Prof. Efrat Shimshoni (efrat.shimshoni@biu.ac.il)
Subject: Reference letter for Dr. Will Barker - Tenure Track position at Bar-Ilan Center for Computational Astrophysics
Link for tuning: Job Posting
Notes: A separate notification was sent on 2025-10-15. The deadline is an estimate.
Importance of this letter: 9/9
Deadline: 2025-09-30
Regarding: Fondazione Antonio Madonna ETS Scholarship
Submission instructions: Invitation link will be sent via email
Link for tuning: Job Posting
Notes: Standard letters were requested for Mike and Will only. In Anthony's case, it was necessary to prepare a public non-reference letter of endorsement, and this was negotiated separately.
Importance of this letter: 8/9
Deadline: 2025-09-25
Regarding: Postdoctoral Junior Leader Fellowship at Instituto de Astrofisica e Ciencias do Espaco
Submission instructions: Invitation link will be sent via email
Link for tuning: Job Posting
Notes: Apart from the formal invitation emails, a separate notification was sent on 2025-09-19.