If you want to get a better picture of how I think, my posts on opinions I changed (part I, part II, part III) are a good start. You can leave anonymous feedback here and download a pdf version of the CV here.

Marius Hobbhahn

Google Scholar

Work Experience

May 2023 - now: Co-founder and CEO of Apollo Research
June 2022 - April 2023: part-time research fellow for Epoch


International Max-Planck Research School Tübingen, Germany

PhD with Philipp Hennig, 2020-2023 (currently writing thesis)
Topic: Making Bayesian ML fast and scalable

University of Tübingen, Germany

M.Sc., Machine Learning, 2018-2020
Grade (1.5)

University of Tübingen, Germany

B.Sc., Computer Science, 2016-2019
Grade: 1.7 (3.3 GPA equivalent)

University of Tübingen, Germany

B.Sc., Cognitive Science, 2015-2018
Grade: 1.8 (3.2 GPA equivalent)

Willstätter Gymnasium Nürnberg, Germany

Abitur, 2007 - 2015
Grade: 1.4 (3.6 GPA equivalent)

Research Interests

AI Safety and Alignment
Model evaluations
Deceptive Alignment


AI safety/alignment

  • SPAR23 mentor: Mentor of 7 AI safety students for SPAR by UC Berkeley
  • LTFF grantee: Received funding for independent research on AI safety from the Long-Term Future Fund (2022)
  • SERI MATS scholar: Research on deceptive alignment mentored by Evan Hubinger
  • Emergent Ventures grantee Explored the role of Bayesian ML for AI safety
  • AI safety camp participant: Researched reflection mechanisms as an alignment target (supervised by Beth Barnes)
  • AI safety mentors and mentees founder Founded a program that connects talented individuals with senior AI experts
  • OpenPhil reviewer: Reviewed articles for the Open Philanthropy worldview investigations team
  • Reading group participant: Participated in the AGI fundamentals reading group and in CLR's s-risks intro fellowship by

University Debating

  • My most prestigious speaker achievements include: 3x breaking ESL at EUDC, Winning Tilbury 2019 and Doxbridge 2020 (Oxford final), Winning 2 Campus Debatten and the Southern German Championship, breaking as 3rd (2018), 2nd (2019) and 1st (2020) team at the German National Championships (DDM) and being best speaker and grand finalist at the DDM 2020
  • Broke at 35+ tournaments, were in the top 10 speakers 20+ times and won 10+ of them.
  • Broke at 20+ tournaments as adjudicator and chaired 5+ finals. I chief-adjudicated 15+ tournaments.
  • Organized 5+ tournaments and was (vice-)president of the debating club for two years.


  • Lead-organizer of the ELLIS doctoral symposium in 2021. I led a team of 12 and the event had 100 participants.
  • Teaching Teaching assistant for Probablistic ML (2020, 2021), Data Literacy (2021, 2022) and math summer course (2016, 2017)
  • Supervisor for 3 Bachelor and 1 Master theses
  • Reviewer for various conferences including ICML22 and NeurIPS22


  • Languages English (C2), German (native), French (B2)
  • Coding Python > R, > Julia, Java
  • Machine Learning Pytorch > JAX > Tensorflow

Selected Publications

Compute Trends Across Three Eras of Machine Learning

Jaime Sevilla, Lennart Heim, Anson Ho, Tamay Besiroglu, Marius Hobbhahn, Pablo Villalobos (2022). IJCNN.
[arxiv] [Our World in Data]

Laplace Matching for fast Approximate Inference in Generalized Linear Models

Hobbhahn, Marius and Hennig, Philipp. (2021).
[arxiv] [code] [blog]

Fast Predictive Uncertainty for Classification with Bayesian Deep Networks

Hobbhahn, Marius; Kristiadi, Agustinus and Hennig, Philipp. UAI 2022.
[arxiv] [code] [Blog post]

Other Publications

Reflection Mechanisms as an Alignment Target: A Survey

Hobbhahn, Marius, Eric Landgrebe and Elizabeth Barnes. NeurIPS ML Safety Workshop. 2022.

Investigating Causal Understanding in LLMs

Hobbhahn, Marius, Tom Lieberum and David Seiler. NeurIPS Workshop on Causality for Real-world Impact. 2022.

What are the Red Flags for Neural Network Suffering?

Hobbhahn, Marius and Jan Kirchner. Seeds of Science. 2022.

Should Altruistic benchmarks be the norm in Machine Learning?

Hobbhahn, Marius; ICML2021 Workshop for Socially Responsible Machine Learning

Sequence Classification using Ensembles of Recurrent Generative Expert Modules

Hobbhahn, Marius; Butz, Martin; Fabi, Sarah and Otte, Sebastian. ESANN (2020).
[ESANN2020 proceedings] [code]