He succeeds B V R Mohan Reddy, who served as Chairman of NASSCOM for 2015-16.
Gurnani is part of NASSCOM's Executive Council and is the Managing Director and Chief Executive Officer of Tech Mahindra.
"As Chairman of the Executive Council, Mr. Gurnani will lead and assist NASSCOM in catalysing the growth of the Indian technology and services industry and enabling the fulfilment of its future goals and aspirations", a NASSCOM statement said.
The Executive Council also announced the appointment of Raman Roy, Chairman and Managing Director of Quatrro Global Services, as the Vice Chairman of NASSCOM for 2016-17.
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"Innovative startups and disruptive technology have together created exciting times for the industry. Being at the helm of NASSCOM, I will continue to drive greater engagement with our stakeholders and members to address the prevalent industry issues of inclusion, education, infrastructure security and corporate governance", Gurani added.
Meanwhile, B V R Mohan Reddy said, "2015 was a defining year for the industry as we outlined our vision for the decade ahead and witnessed innovative entrepreneurs rise to achieve tremendous success, making India one of the key Startup hubs across the globe"