BANGALORE, INDIA: The chief executive of India's Infosys Technologies' business process outsourcing arm, which employs about 16,000 staff, has quit.

Amitabh Chaudhry, who took over as the chief executive of Infosys BPO in March 2006, had submitted his resignation and is serving his notice period, a spokeswoman of Infosys said. She declined to provide more details.

Infosys BPO, a fully-owned unit of Infosys Technologies, India's second-largest software exporter, offers finance and accounting, human resource and legal services outsourcing. Its revenue grew 26 per cent to $316 million in the year to March 2009.

Earlier this month, Infosys BPO said it will acquire U.S.-based McCamish Systems for an upfront payment of $38 million to boost its service offerings.

The boom in business process outsourcing, or BPO, is built on a large, skilled and low-cost English-speaking workforce, but a global economic slowdown has crimped spending by companies.