Parekh, who is joining the company from Capgemini, will take over on January 2, 2018, Infosys said in a statement.
"He (Parekh) has nearly three decades of global experience in the IT services industry. He has a strong track record of executing business turnarounds and managing very successful acquisitions," said Nandan Nilekani, Chairman of Infosys Board.
The board believes that Parekh is the right person to lead Infosys at this transformative time in the industry, he added.
Previously, Parekh was associated with Capgemini where he was a member of the Group Executive Board.
U B Pravin Rao will step down as the interim CEO and Managing Director effective January 2, 2018 and will continue as Chief Operating Officer and a whole-time Director of the company, Infosys said.