SGPC President Avtar Singh Makkar handed over the appointment letter to Singh in a brief religious function at its headquarters here.
Makkar said that Singh was a seasoned and experienced person to look after and improve the functioning of over 100 educational institutions, including medical, engineering colleges and university run by the SGPC.
The newly appointed Chief Secretary would also be helpful to promote Sikhism all over the country and the world, he said.
