Since your son is in the final year of Mechanical Engineering and once he acquires this qualification, he should make his endeavour to get a job in his related area without loosing his time in some non productive assignments. To make the use of time, he needs a further revision of the subjects already taught in his syllabus especially the fundamentals related to different boilers, efficient utilisation of steams, procedure of mechanical maintenance of work - shops etc. He has to be effective in his communication skill so as to grab a post in his area. Earlier, he starts a career, he would enjoy better promotional prospects apart from better pay package for the continuity of service.
In regard to his admission to B.Sc course, it would not be difficult in the stream he likes. His admission would be considered on the basis of his marks secured in the intermediate stage. Doing this course from a regular college would mean that he should defer the line of action in his well thought planning and the time consumed in this course to the extent of three year cannot be compensated later. The best way would be to take up this course from the distance education mode from any one of the universities such as IGNOU, Karnataka Open University, Annamalai University etc where your son would utilise his leisure hours for the preparation of the examination.
Now I would suggest some fruitful courses which will help in his career advancement. These are as follows-
1) AMIE in Chemical Engineering - At the starting point, you will be waived from the Section A containing eight papers by virtue of your qualification in Mechanical Engineering. In Section B, there will be altogether nine papers and you may clear the papers as per your convenience taking them part wise in a given session. In a year, you will have two sessions to write your papers. To expedite the clearance of papers, you may enrol in an established institution for better guidance.Thus you will have dual qualification both in Mechanical and Chemical Enginnering accelarating your promotional scopes in your service career.
2) Advanced Diploma in Industrial Engineering- You may procure this diploma from a recognised institution where you will be taught how much time should be devoted to carry out the single operation of the plant. This course would dwell on effective utilisation of man - power, curtailing the maintenance hours of shops, studying various models of operations where quality production is achievable with the less usage of some components thus saving our production cost.
3) Take Management degree through the distance mode - This could be in the area of Production, Finance or Management of computers. Proficiency in one of areas will help your son to have accelerated promotion.