"We are negotiating the details with Peter Reid of England and German Holger Osieck," Worawi told the Bangkok Post. "A deal will be finalised in a few weeks and I will formally announce who will be the new national coach."
Reid, who led Sunderland to promotion twice during a seven-year spell with the Black Cats, has not held a manager's position since leaving Coventry in January 2005.
Osieck was Franz Beckenbauer's assistant during Germany's World Cup-winning campaign in 1990 and led unfancied Canada to victory in the CONCACAF Gold Cup in 2000.