Mechanical engineers in India can explore various government job opportunities in both the central and state government sectors. Here are some popular government job options for Mechanical engineers:

1. Indian Engineering Services (IES): IES, also known as Engineering Services Examination (ESE), is conducted by the Union Public Service Commission (UPSC) to recruit engineers for various government departments. Mechanical engineers can apply for this prestigious service.
2. Public Sector Undertakings (PSUs): Many PSUs like BHEL, ONGC, NTPC, and Indian Oil Corporation regularly hire mechanical engineers for various technical and managerial positions. These jobs offer job security and good pay.
3. Railway Recruitment Board (RRB): Indian Railways hire mechanical engineers for various technical and non-technical positions, including assistant engineers, junior engineers, and section engineers.
4. Defence Research and Development Organization (DRDO): DRDO offers opportunities for mechanical engineers to work on defense-related research and development projects.
5. Indian Space Research Organisation (ISRO): ISRO hires mechanical engineers for various positions related to the development and maintenance of satellite systems and launch vehicles.
6. Central Public Works Department (CPWD): CPWD recruits mechanical engineers for various technical roles related to civil engineering and infrastructure development.
7. Indian Ordnance Factories (IOF): IOF offers opportunities for mechanical engineers to work in the production of defense equipment and ammunition.
8. State Public Service Commissions: State governments also recruit mechanical engineers for various positions in departments such as public works, water resources, and power.
9. Power Plants and Electricity Boards: Mechanical engineers are in demand in state and central power generation and distribution companies for roles related to maintenance and project management.
10. Indian Navy and Coast Guard: Mechanical engineers can join the Indian Navy and Coast Guard as engineers to work on various technical aspects of ships and submarines.

To apply for these government jobs, you need to regularly check official government websites, newspapers, and job portals for notifications about vacancies. Additionally, you may need to appear for relevant competitive exams and interviews, depending on the specific position and department. It’s important to meet the eligibility criteria and prepare well for the selection process to secure a government job as a mechanical engineer in India.