I am an Applied Scientist at Amazon in New York City, working on foundational sequence models in a team led by Gert Lanckriet. I completed my PhD in the Computer Science Department at ETH Zürich, where I was advised by Fanny Yang and was part of the Institute for Machine Learning. During my PhD, I was also a visiting graduate student at Harvard University, hosted by Issa Dahabreh in the CAUSALab, with the support of the Ermenegildo Zegna Founder's Scholarship.

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Selected Publications

Efficient Randomized Experiments Using Foundation Models
Piersilvio De Bartolomeis, Javier Abad, Guanbo Wang, Konstantin Donhauser, Raymond M. Duch, Fanny Yang, and Issa J. Dahabreh
Advances in Neural Information Processing Systems (NeurIPS), 2025
Trial Emulation, Simulation, and Augmentation Using Electronic Health Records and Generative AI
Issa J. Dahabreh, Robert W. Yeh, and Piersilvio De Bartolomeis
NEJM AI, 2025
Hidden Yet Quantifiable: A Lower Bound for Confounding Strength Using Randomized Trials
Piersilvio De Bartolomeis*, Javier Abad*, Konstantin Donhauser, and Fanny Yang
International Conference on Artificial Intelligence and Statistics (AISTATS), 2024