Not BARC and DRDO, But ISRO does have Jobs for Earth & Planetary Science Postgraduates, in its IIRS Remote Sensing Division, subject to Advertisements. You may even find jobs with Geology and Mining Agencies as well as Geotechnical and Drilling Organizations.

You might prepare for the UPSC Combined Geo Scientist and Geologist Exam, leading to a Geology Job with Government and Public Sector Organizations.

Other options you have are of PhD or maybe MBA leading to a career in Research or Management Respectively. Incase youre interested in Pursuing Government Jobs, you might appear for UPSC CSE, SSC CGL, PCS, Railways RRB and Other Similar Examinations.

After MSc., you might pursue MTech in Geology/Petroleum Engineering/Geotechnical Branches or related Industrial Disciplines from some of the Top Institutes like IIT Bombay, IIT Kharagpur, IIT ISM Dhanbad, leading to a strong Career with Industry.

For more information about Earth Science do follow the link below

https://www.careers360.com/courses/earth-science-course

For more information about the UPSC Combined Geo Scientist and Geologist Exam do follow the link below

https://competition.careers360.com/exams/upsc-combined-geo-scientist-and-geologist-exam