Thng, whose appointment is effective from today, replaces Phee Teik Yeoh, who has returned to Singapore Airlines.
A joint venture between Tata Group and Singapore Airlines, the airline began its commercial operations in January 2015. Currently, it has a fleet of 16 aircraft and has ambitious expansion plans, including flying overseas destinations.
"Thng has taken over as the airlines new CEO post all requisite approvals from the Government of India and regulatory authorities," Vistara said in a release.
He has joined the carrier from Budget Aviation Holdings -- a Singapore Airlines Holding Company -- where he was serving as the Chief Commercial Officer.
"I look forward to the opportunity to build on the strong foundation and momentum created by Phee Teik Yeoh, and work with the wonderful team of Vistara. I hope to get the support of all stakeholders, including the customers, to take Vistara through its next phase of growth and development," Thng said.
Thng started his career with Singapore Airlines in 1999 and has held many senior positions at the carrier. Among others, he has served as chief executive of Silk Air.
TATA SIA Airlines Ltd operates under the brand name Vistara.