Serco Global Services, formerly Intelenet Global Services, has joined the big league of BPO companies after it posted £716 million (about $1.1 billion) in revenues.

The company has joined the likes of BPO firms such as Essar Group’s arm Aegis and Genpact.

Intelenet, the Indian BPO company, was acquired by Serco for about Rs 2,772 crore in 2011, making it the largest acquisition in the Indian BPO space. Intelenet’s founder Susir Kumar heads Serco Global Services as its executive chairman.

in top-tier league

“The establishment and growth of Serco Global Services, with global annual revenues in excess of $1.1 billion, places Serco as a top-tier international BPO organisation,” parent company Serco said in a filing with the London Stock Exchange.

The parent firm Serco announced results for the full-year ended December 31, 2012, on Tuesday.

The Indian BPO company Intelenet Global Services was formed in October 2000 as an equal joint venture between Tata Consultancy Services and HDFC. It had started operations in November 2001 with 25 employees and now employs 60,000.