Indian Oil Corporation Limited (IOCL) is recruiting for an Industrial Hygienist position at its Haldia Refinery Hospital on a contractual basis for 2025. Applicants need a graduate degree in Chemistry, Physics, or Environmental Toxicology, with preference given to those who studied Environmental Toxicology. The maximum age limit is 40 years. Applications must be submitted with supporting documents and photographs by January 5, 2026.