Amitabha Guha joins SIBBS Reporter / Chennai/ Kochi November 10, 2010, 0:36 ISTAmitabha Guha has joined South Indian Bank (SIB) as non-executive chairman in the place ofGA Shenai, who retired recently. Guha is a former managing director of State Bank of Travancore (SBT) and of State Bank of Hyderabad (SBH).