S1 Corporation has announced the appointment of Simhua Lui as general manager of S1's Asia Pacific Japan (APJ) operations.

Lui joins S1 from Informix, where as corporate vice president and general manager he led its expansion in the Asia region, building the Informix team and growing the application solution business. He takes on similar responsibilities at S1, pushing a range of integrated software solutions to financial services providers in the region.

The company's customer base already includes organisations such as OCBC Bank, Credit Agricole Indosuez, and the major Australian banks.