Amidst the row in US over outsourcing, a study has said that big corporates like Essar, HCL, Tata, Mahindra and Wipro Technologies have generated over 30,000 jobs for in recent years.

Tata Group alone employs 19,000 Americans and has invested over $3 billion, besides operating 16 businesses in US, a report by US-India Business Council (USIBC) and industry body FICCI said on Sunday.

Indian employers and their American workers contribute billions of dollars to the Federal, state and local treasuries by way of wages, corporate taxes, payroll taxes and income taxes, the study said. About 12 Indian companies, including Essel-Propack, ITC Kitchens of India, Ranbaxy, Satyam and Wockhardt, are making a sizable impact on US economy, chamber said.

With a presence in nearly a dozen states like Arizona, Colorado, Florida, Missouri, New York and Texas, Essar's American operations generated more than 110 million dollars in revenues last year and has employed about 7,200 people till now, which would increase to 8,500 by next year.

While Jet Airways has purchased 72 aircraft from Boeing and with 120 direct employees, the company, which has offices in New York, New Jersey and California, has paid $36 million to the US market in total wages, taxes, and fees to airports. India's first pharma MNC, Ranbaxy, which is to be taken by Japanese firm Daiichi Sankyo, has created 600 jobs and produced 142 drugs, the report added.

In the IT sector, while Satyam employs 5,000 Americans, Wipro Technologies created 8,000 jobs and 1,000 new jobs are coming to Georgia and Michigan cities.