An April 2018 study by the National Foundation for American Policy, a US think tank, said Amazon, Microsoft, Intel and Google were among the top 10 employers who got H-1B visa for employees in 2017.
Though Indian IT is predicting strong growth this year, a slump in US & Brexit may upset plans.
Experts say the growing importance of technology is driving the growth of investment in third-party centres.
Trump's tweaks in the H-1B visa programme have made it harder to get a work visa or have it extended.
Amazon has had executives working on global product development for more than 12 years in India, long before the 2013 launch of its marketplace in the country.
Unemployment in the technology sector in the US dropped below 2% in 2018 and the September data from the US Bureau of Labour Statistics show a massive gap in jobs and supply.
TCS will continue to invest aggressively to win deals as it looks to end FY19 with double-digit growth.
Tata Consultancy Services is holding on to its 26-28% band while Infosys cut its band to 22-24% from 23-25% earlier this year to allow it room to invest in its US talent model.
The company has now brought in a chief marketing officer for Ignio, Sunil Robert, who started in late December, and a head of analyst relations, who joined in October.
Blue Prism, which reported sales of about £3 million in FY18, is not the only robotic process automation company that is looking to bring in heavy hitters to grow in India.
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