The chief executive of Tech Mahindra,which is taking over Satyam Computer Services,said on Friday the fraud-hit outsourcer had 10,000 excess staff on an employee base of 40,000. Last month,Tech Mahindra won an auction for a controlling stake in New York-listed Satyam. Satyam's founder and former chairman shocked investors in January by saying profits had been overstated for years,putting in doubt the survival of a company once ranked as India's fourth-largest software services exporter.