For an engineering graduate in mechanical stream there are many options as many industries hire them for their work. Some of these industries are automobiles, aeronautical, oil and gas sector, metals and minerals industry, manufacturing, fabrication, air conditioning and refrigeration, refineries, shipping, design and engineering, robotics, nanotechnology, biomedical engineering, energy conservation, environmental engineering etc. It is also correct that though opportunities are there but due to large number of qualified people vying for jobs, there is fierce competition. In this situation one has to work hard to compete with others to excel in any field for making a bright career.
Please keep a close watch in news papers or media on the various openings in the different sectors and selectively apply for jobs so that if opportunity comes you can switch your job. As you have some experience in metal treatment area so you can definitely look preferably in the metal and mineral processing and trading industries.
If you feel that you are stagnated in the present job and the future prospects are also not bright then there are some areas where one can think to acquire additional qualification so that switching the job may become a reality. Some of these options are going for M.Tech. in mechanical stream, MBA, diploma course in piping design and engineering, course in Robotics, course in Mechatronics etc.
Another important point is that a mechanical engineer can also think of joining some jobs which may not pertain to its core area but are possible to manage with some learnings and hard work and have a good career potential. These areas are in the field of Logistics, Operations management, Input planning (procurement, purchasing and buying), Warehousing, Supply chain management, Technical consulting, Private teaching and coaching etc. So depending upon one's interest and liking such areas can also be explored.
Going abroad for job will require either some educational qualification in the related stream from that particular country or getting an employment letter from an employer abroad. Without sponsoring one will not get work Visa for that country. For acquiring additional education, one has also to be financially capable to cope up with the expenditure on education there. If one can financially afford then that is also a good option to go for a related course in the foreign institution and then try for the job there itself.
Knowledge is power.