Bath is replacing Frank Cohen who is leaving the company to "pursue other interests".
In his role Bath is to be responsible for the pan-regional commercial development of the SPI Group portfolio, with a focus on Stolichnaya vodka and elit by Stolichnaya.
Bath joins SPI Group from Del Monte Asia, where he was managing director of the region. He has also worked for Diageo and Pernod Ricard in the region.
Originally from the UK, Bath is to be based in the new SPI regional headquarters in Singapore.