Luca Belli is a Visiting NIST AI Fellow, a UC Berkeley Tech Policy Fellow and the founder of Sator Labs. At NIST he’s co-leading the Red Team effort for the Generative AI Public working group and thinking about socio-technical evaluations for Recommender Systems. Luca was also selected as an expert by the European Commission, to help with the delegated act of Article 40 of the DSA. Previously he was the co-founder and Research Lead for Twitter's Machine learning Ethics, Transparency and Accountability (META) team where he guided industry leading approaches for responsible ML practices and product changes. Before that he operated as a Data Scientist and Machine Learning Engineer at Conversant and WolframAlpha. His research interests lie at the intersection of feedback loops, algorithmic amplification, and algorithmic audits.