The Machine Advisory Committee (MAC) comprises international experts from large synchrotron facilities, which meet regularly to review the development, commissioning, and operation of the Sirius accelerators.
The Committee is composed of the following members:
| Bob Hettel (Chair) | Argonne National Laboratory | USA |
| David Robin | Lawrence Berkeley National Laboratory | USA |
| Hamed Tarawneh | MAX IV Laboratory | Sweden |
| Joel Chavanne | European Synchrotron Radiation Facility (ESRF) | France |
| Marie-Emmanuelle Couprie | Synchrotron SOLEIL | France |
| Nadji Amor | Synchrotron SOLEIL | France |
| Pedro Tavares | MAX IV Laboratory | Sweden |
| Peter Kuske | Helmholtz-Zentrum Berlin | Germany |
| Qing Qin | European Synchrotron Radiation Facility (ESRF) | France |
| Zhentang Zhao | SINAP | China |