Namely, the then-32-year-old Prabhjot Singh, who at that time, still hadn’t completed his residency program at Mount Sinai. Now, a lawsuit aimed at Charney and the Arnhold Institute for Global Health (AIGH) describes a toxic work culture that the plaintiffs say manifested under Singh, and alleges that the dean cast aside many of the older women employees who had worked to make AIGH successful. …