Standard Chartered has re-hired Wichak Sirisae, head of derivatives and securities trading in Bangkok at Citigroup in Bangkok, as treasurer in Bangkok. Sirisae, who started last week, said he has replaced Raymond Lee, treasurer, who has transferred to Kuala Lumpur for a senior banking role within the bank. Prior to his stint at Citi, Sirisae was the head of interest rate trading at StanChart.