New Delhi: Kumar Shanker has taken over as managing director of Indraprastha Gas, the country's largest city gas distributor, replacing Kamal Kishore Chatiwal, who has returned to GAIL.A chemical engineer from BITS Pilani, Shanker has spent more than three decades at GAIL in various roles. Prior to this appointment, he served as managing director of Maharashtra Natural Gas Ltd (MNGL) in Pune. Under his leadership, MNGL grew to become one of the top five city gas distributors in the country, IGL said in a statement. IGL is a JV between GAIL andBPCL, with the Delhi government holding a 5% equity stake.