Nigro as Asst FDNY Chief oversaw the MERGER of EMS, he was never the Chief of EMS, that is another title.Of note, ex-commissioner and COD Nigro was on a transition panel for Mandani and in some public comments recently seemed to suggest he would be making a recommendation to the Mayor on who the next FC would be. Bonsignore was on the executive staff when Nigro was FC, and he was the first-ever Chief of EMS following the merger. Pure speculation but it seems plausible this choice was at least partly his idea. All the best to the new FC.