To join Merchant Navy after completing engineering you must have B.Tech in any of the following specializations:

• Marine Engineering
• Naval Architecture and Offshore Engineering
• Petroleum Engineering
• Mechanical Engineering
• Harbour & Ocean Engineering
• Civil Engineering
• Electrical & Electronics Engineering

After completing engineering, you can work as a Cadet Engineer, Junior Engineer, Third Engineer, Second Engineer, and Chief Engineer depending upon the vacancies available.

Engineers are sent on the pre-sea training for a year before they are sent on board. Then they are placed on the ship for a training period of approximately 6 months. After their training period, they appear the competency examination and work as the fourth engineer on ships. For moving up the ladder, they are expected to complete sea time and then they write competency exams.

For further information you can check the IMU(Indian Maritime University) website