Markus Orsi, PhD

Post Doctorate Scientist, F. Hoffmann-La Roche

Computational scientist building machine learning tools for drug discovery. Previously PhD in data science and cheminformatics at the University of Bern.

experience

Post Doctorate Scientist 2025 – present

F. Hoffmann-La Roche · Basel

Developed machine learning models tailored for small datasets to evaluate key biological safety endpoints and deployed them company-wide. Integrated predictive models into routine testing cascades, co-defining the strategy for pairing ML predictions with wet-lab assays to optimize screening operations. Additionally, created and launched an automated report generation tool to reduce manual data handling, while serving as a People Enabler to coach colleagues, foster skill development, and supervise data science interns on end-to-end projects.

PythonPyTorchRDKitGitADMETdata visualizationmentoring
PhD Researcher 2021 – 2025

University of Bern · Prof. Jean-Louis Reymond · Bern

Applied cheminformatics and data science to guide candidate selection across multiple modalities, including peptides, small molecules, natural products, and organometallic complexes. Collaborated with wet-lab teams to define chemical design spaces, screen ultra-large combinatorial libraries, and select promising compounds for experimental testing. Developed computational tools to support this pipeline, including custom molecular fingerprints, genetic algorithms for virtual library screening, and models predicting molecular properties from chemical structure. Additionally, evaluated large language models (LLMs) to benchmark their performance in chemical research tasks.

PythonPyTorchRDKittransformer modelscheminformaticsantimicrobial discoverytherapeutic peptidesdrug designmolecular property predictionmolecule optimizationHPCscientific writingmentoring
Graduate Student Researcher 2020 – 2021

University of Copenhagen · Prof. Trond Ulven · Copenhagen

Combined wet-lab organic synthesis with AI-driven generative models to design, generate, and synthesize novel small-molecule FFA2 receptor antagonists. Developed a virtual ranking workflow to prioritize generated candidates for synthesis and biological activity testing.

medicinal chemistryorganic synthesischemical language modelsvirtual screeningGPCR pharmacologymetabolic syndrome
Graduate Student Researcher Jun – Aug 2020

ETH Zürich · Prof. Donald Hilvert · Zürich

Applied directed mutagenesis and phenotypic selection to engineer a computationally designed heme protein, optimizing its activity for sustainable biocatalytic reactions in aqueous environments.

protein engineeringdirected mutagenesiscomputational protein designbiochemical assays
Graduate Student Researcher Nov – Dec 2019

ETH Zürich · Prof. Gisbert Schneider · Zürich

Screened and ranked a virtual compound library to identify potential inhibitors of the bacterial HtrA protein, followed by the organic synthesis of top-ranked candidates for experimental evaluation.

virtual screeningmedicinal chemistryorganic synthesisantimicrobial discovery

skills

programming & tools

PythonPyTorchscikit-learnpandasRDKitGitclaude code

machine learning

molecular property predictiondeep neural networksgraph neural networkstransformer modelsvirtual screeningQSARuncertainty quantification

domain

drug discoverydrug designcheminformaticsADMETantimicrobial peptides

wet lab

organic synthesischemical analyticsprotein engineeringbacterial cell culturecell transfectionbiochemical assays

languages

italian: nativegerman: nativeenglish: fluentmandarin: beginner

education

PhD, Data Science and Cheminformatics 2021 – 2025

University of Bern — Grade: 6.00/6.00

MSc, Pharmaceutical Sciences 2019 – 2021

ETH Zürich — Grade: 5.38/6.00

BSc, Pharmaceutical Sciences 2016 – 2019

ETH Zürich — Grade: 5.19/6.00

awards

Novo Nordisk International Talent Program Scholarship 2020 – 2021

Scholarship supporting student mobility between the University of Copenhagen and IARU partner institutions including Harvard University.

service

Chair 2025 – 2027

ACS Swiss Chapter, Bern

University Representative 2021 – 2023

youngSCS, Bern

Event Organizer 2022 – 2023

Pint of Science, Bern

President 2019 – 2020

ETH Career & Networking Days, Zürich

Head of Events & Trainings 2019 – 2020

National Association of Pharmacy Students, Bern

Head of Cultural Committee 2017 – 2019

Akademischer Pharmaziestudierendenverein (APV), Zürich

research

Predicting CYP450 Induction and PXR Activation with Machine Learning Approaches: Challenges and Opportunities

M. Orsi, M. Gätzner, A. Thieme, N. Milani, J. Napoli, M. Reutlinger, K. Umehara, J. Kirchmair, A. Morger, J. Clifton

ChemRxiv · 2026

Assigning the stereochemistry of natural products by machine learning

M. Orsi, J. Reymond

Journal of Cheminformatics · 2026

Large chemical spaces—Modeling and searching of large chemical spaces

M. Orsi, J. Reymond

Elsevier eBooks · 2025