Oil India Limited (OIL) invites online applications from Indian nationals for various Grade D, E, and F executive vacancies, including Deputy Chief Chemist, Geologist, Reservoir Engineer, Geophysicist, S&E Engineer, and Economist (Advt No: HRAQ/REC-EX-B/2026-01). Pay scales range up to ₹2,60,000 depending on the specific grade structure. The final deadline to submit the online application is 28/06/2026 before 23:59 hours. Detailed notification and eligibility pathways are available on the official portal at oil-india.com.