Though the value of the 7-year deal was not disclosed, sources said the size of the agreement is about USD 500 million.
When contacted, HCL Technologies said: "We are pleased to be working with PepsiCo. However, we are not able to discuss further details at this stage."
Comments from PepsiCo India could not be obtained immediately.
PepsiCo, with brands like Lays, Tropicana and Quaker in its portfolio, has worked with many IT service providers in the past, including HP, IBM and Hewitt Associates.
HCL Technologies' infrastructure services, which accounted for about 30 per cent of its revenues in the January-March 2014 quarter, grew 31.5 per cent year-on-year, driven by strong demand especially in the rebid market.
For the quarter, the Noida-headquartered firm saw net profit jumping 59 per cent to Rs 1,624 crore, helped by strong growth in infrastructure services as well as financial and manufacturing verticals.
A PepsiCo spokesperson later confirmed the development.
"After careful consideration, we are making some changes to our global IT organisation that will enable us to stay competitive while meeting the needs of our business," the spokesperson said.
HCL has systems, expertise and scale to help PepsiCo in this endeavour, the spokesperson added.
"As a policy, we do not disclose financial details," the spokesperson responded when asked about the deal size.