X0206 3 2021-01-26 1 0001822862 Fortistar Sustainable Solutions Corp. FSSI 0001826363 Contino Scott C/O FORTISTAR SUSTAINABLE SOLUTIONS CORP ONE NORTH LEXINGTON AVENUE WHITE PLAINS NY 10601 true Chief Financial Officer Exhibit 24.1 - Power of Attorney. /s/ Nadeem Nisar, Attorney-in-Fact for Scott Contino 2021-01-26