However, Infosys declined to comment on Singh's exit.
Singh was managing a portfolio of around USD 1.5 billion under his vertical.
Prior to Toombs, in August, the most prominent company executive M D Ranganath had put in his papers as the Chief Financial Officer.
Singh has the distinction of growing the business from a mere USD 100 million to nearly USD 750 million in revenues.
(This story has not been edited by Business Standard staff and is auto-generated from a syndicated feed.)