Faculty from Italian institutions
| Professor | Institution |
| Leonardo Bargigli | University of Florence |
| Stefano Bartolini | University of Siena |
| Marcello Basili | University of Siena |
| Filippo Belloc | University of Siena |
| Salvatore Bimonte | University of Siena |
| Leonardo Boncinelli | University of Florence |
| Paolo Brunori | University of Florence |
| Gabriele Cappelli | University of Siena |
| Valerio Cerretano | University of Florence |
| Fulvio Corsi | University of Pisa |
| Lorenzo Corsini | University of Pisa |
| Guiliano Curatola | University of Siena |
| Simone D’Alessandro | University of Pisa |
| Massimo D’Antoni | University of Siena |
| Alberto Dalmazzo | University of Siena |
| Marwil Davila-Fernandez | University of Siena |
| Paolo Di Martino | University of Turin |
| Giovanna Dinverno | University of Pisa |
| Nicola Doni | University of Florence |
| Davide Fiaschi | University of Pisa |
| Lapo Filistrucchi | University of Florence |
| Chiara Franco | University of Pisa |
| Nicola Giocoli | University of Pisa |
| Alessandro Gioffre’ | University of Florence |
| Michele Gori | University of Florence |
| Marco Guidi | University of Pisa |
| Francesco Guidi | University of Florence |
| Annalisa Luporini | University of Florence |
| Antonio Magliulo | University of Florence |
| Nicola Meccheri | University of Pisa |
| Domenico Menicucci | University of Florence |
| Alessandro Palandri | University of Florence |
| Angela Parenti | University of Pisa |
| Riccardo Pariboni | University of Siena |
| Pierpaolo Parrotta | University of Siena |
| Paolo Pin | University of Siena |
| Tiziano Razzolini | University of Siena |
| Giorgio Ricchiuti | University of Florence |
| Leonardo Ridolfi | University of Siena |
| Maria Rossi | University of Chieti-Pescara |
| Laura Sabani | University of Florence |
| Ernesto Savaglio | University of Chieti-Pescara |
| Luciano Segreto | University of Florence |
| Serena Sordi | University of Siena |
| Luca Spataro | University of Pisa |
| Alessandro Tampieri | University of Florence |
| Silvia Tiezzi | University of Siena |
| Vincenzo Valori | University of Florence |
| Michelangelo Vasta | University of Siena |
| Carlo Zappia | University of Siena |
Emeritus Faculty or board members from non-Italian institutions
| Professor | Institution |
| Samuel Bowless | Santa Fe Institute |
| Gabriel Burdin | University of Leeds |
| Giovanni Federico | New York University |
| Francesca Gagliardi | University of Hertfordshire |
| Roberto Galbiati | Sciences Po & CNRS |
| Geoffrey Hodgson | University of Hertfordshire |
| Steffen Hoernig | University of Nova Lisbon |
| Heinz Kurz | University of Graz |
| Patrizio Piraino | University of Notre Dame |
| Paul Sharp | University of Southern Denmark |
| Roberto Veneziani | Queen Mary University |
| Skerdilajda Zanaj | University of Luxembourg |
| Ugo Pagano | University of Siena |
| Neri Salvadori | University of Pisa |
The full composition of the PhD Board approved for the academic years 2023-2026 and signed by the President of the University of Siena can be found here.