Viswanathan assumed her current role in June 2022, having joined FedEx in 2021. In May 2024, FedEx Logistics, a subsidiary of FedEx, signed an MoU with the Qatar Free Zones Authority to establish a regional logistics facility in Qatar’s free zones. FedEx inaugurated its newest $350 million cargo hub in February 2024 at Dubai World Central Airport in Dubai South. Viswanathan also cofounded Lumina Datamatics, a content service company, in 2006.