Singh, 57, previously was Executive Director in state gas utility GAIL (India) Ltd.
He will be in charge of IOC's 13,400-km network of crude oil, petroleum product and gas pipelines with a throughput capacity of 94.79 MTPA of oil and 9.5 million metric standard cubic metres per day of gas, a company statement said here.
A mechanical engineer from MIT, Muzaffarpur and a post graduate in Turbo Machinery from South Gujarat University, Singh has about 32 years of experience in the petroleum and natural gas sector.
"He has substantive experience in design engineering, planning, execution, operations and maintenance streams of the hydrocarbons sector," it said.
Besides operating the world's largest oil pipeline network, IOC is implementing projects that will further increase the length of the network to about 20,000 km and throughput capacity to 102 MTPA, the statement said.