- Georgios Sakellaris (Assistant Professor, Aristotle University of Thessaloniki)
- Filippo Santambrogio (Full Professor, Institut Camille Jordan, Université Claude Bernard - Lyon 1)
- Flavia Santarcangelo (Phd, SISSA)
- Mario Santilli (Associate Professor, Università dell'Aquila)
- Francesco Sapio (Post Doc., Wolfgang Pauli Institute)
- Alberto Saracco (Associate Professor, Parma)
- Giorgio Saracco (Tenure-Track Assistant Professor, Università di Firenze)
- Juan Sarrionandia (Project Manager, Ikerbasque - Basque Foundation for Science)
- David Sarrocco
- Alessandro Sarti (Professor, CNRS-EHESS, Paris)
- Giuseppe Savaré (Full Professor, Bocconi University, Milan)
- Danil Sboev (PhD Student, Novosibirsk State University)
- Carlo Sbordone (Full Professor, Dip. Mat. Univ. Napoli)
- Alessandro Scagliotti (Technical University of Munich, and Munich Center for Machine Learning)
- Riccardo Scala
- Sergio Scalabrino (PhD Student, SISSA)
- Lucia Scardia (Associate Professor, Heriot-Watt University)
- Vincenzo Scattaglia (PhD Student, Università di Pisa)
- Christian Scharrer (Post Doc., University of Bonn)
- Julian Scheuer (Full Professor, Goethe Universität Frankfurt)
- Armin Schikorra (University of Pittsburgh)
- Armin Schikorra (Associate Professor, University of Pittsburgh)
- Jacopo Schino (University of Warsaw)
- André Schlichting (University of Münster)
- Bernd Schmidt (Full Professor, Universitaet Augsburg, Germany)
- Thomas Schmidt (Associate Professor, University of Hamburg)
- Ben Schweizer
- Giuseppe Scianna (Assistant Professor, Univ. Siena)
- Luciano Sciaraffia (Universität Freiburg)
- Matteo Scienza (PhD Student, Università di Pisa)
- Giovanni Scilla (Assistant Professor (RTDB), Università di Napoli "Federico II" - Dipartimento di Matematica ed Applicazioni "R. Caccioppoli")
- Simone Secchi (Assistant Professor, Università di Milano Bicocca)
- Christian Seis (University of Munster)
- Daniele Semola (Assistant Professor, University of Vienna)
- Banhirup Sengupta (PhD Student, Universitat Autonoma de Barcelona)
- Pierre Seppecher
- Raul Serapioni (Full Professor, Dip. Mat. Univ. Trento)
- Francesco Serra Cassano (Full Professor, Dip. Mat. Univ. Trento)
- Joscha Seutter (PhD-Student, FAU Erlangen-Nürnberg)
- Nageswari Shanmugalingam (Full Professor, University of Cincinnati)
- Akram Sharif (Phd student, Technische Universität Dresden)
- Harish Shrivastava (Post Doc., UFPB, João Pessoa-Brazil)
- Francesca Sianesi (Post Doc., Dip. Mat. Pol. Milano)
- Francesco Siepe (Research Contract, Dip. Mat. Univ. Firenze)
- Anna Siffert
- Laura Sigalotti
- Mario Sigalotti (SISSA)
- Juhana Siljander (Post Doc., University of Helsinki)
- Carlo Sinestrari (Università di Roma "Tor Vergata")
- Yannick Sire
- Firoj Sk (AvH Post Doc., University of Oldenburg, Germany)
- Anna Skorobogatova (Postdoc, ETH Zurich)
- Igor V. Skrypnik (Donetsk, Ukraine)
- Nicola Soave (Associate Professor, Università degli Studi di Torino)
- Andrei Sobolevski (Institute for Information Transmission Problems)
- Alessandro Socionovo (Postdoc, LJLL, Sorbonne Université)
- Giacomo Enrico Sodini (Post Doc., University of Vienna)
- Marcos Solera Diana (PhD student, Universitat de València)
- Sergio Solimini
- Francesco Solombrino (Full Professor, Università del Salento)
- Gianluca Somma (Ph.D. Student, Università degli Studi di Padova)
- Anna SONG (PhD student, Imperial College London / Francis Crick Institute)
- Yuxuan Song (Graduate, University of Warwick)
- Cristian Sopio (PhD Student, University of Parma)
- Massimo Sorella (EPFL)
- Christina Sormani
- Gerardo Sosa (PhD Student, Max Planck Institute for Mathematics in the Sciences)
- Elefterios Soultanis (University of Jyväskylä)
- Daniel Spector (Full Professor, National Taiwan Normal University)
- Gareth Speight (Associate Professor, University of Cincinnati)
- Luca Spolaor (Assistant Professor, UCSD)
- Marco Squassina (Full Professor, Catholic University of Sacred Heart)
- Andrey Stavitskiy (PhD Student, RWTH Aachen University)
- Ulisse Stefanelli (Full Professor, University of Vienna)
- Giorgio Stefani (Fixed-Term Researcher (Ricercatore a Tempo Determinato di tipo A - RTDA), Università degli Studi di Padova)
- Philipp Emanuel Stelzig (Ph.D. Student, Dip. Mat. Univ. Trento)
- Eugene Stepanov (Full Professor, St. Petersburg Branch of the Steklov Research Institute of Mathematics of the Russian Academy of Sciences)
- Paul Stephan (Universität Konstanz)
- Angela Stevens
- Federico Stra (Researcher, Politecnico di Torino, DISMA)
- Bianca Stroffolini (Associate Professor, Dip. Mat. Univ. Napoli)
- Salvatore Stuvard (Associate Professor, Università degli Studi di Milano)