As you want to get the details of career after the course of B.Tech Mechanical Engineering so here it is for you:

B.Tech. Mechanical Engineering Job Types

Technician - Mechanical Engineering
Sales Engineer - Mechanical Engineering
Manager - Mechanical Engineering
Process Development Technologist - Mechanical Engineering
Assoc. Prof. / Asst. Prof. / Professor - Mechanical Engineering
Electro - Mechanical Engineer
Mechanical Engineering - Associate Professor
Laboratory Technician - Mechanical Engineering
Design Engineer - Mechanical Engineering

Some profiles types: -

Lecturer
Researcher
Junior Engineers
Assistant Engineers
Executive Engineers
Independent Consultants
Mechanical/Sales Engineer
Mechanical Design Engineer
Assistant Executive Engineers

Higher study options after B.Tech mechanical

Master of Technology in Aerodynamics
Master of Technology in Aerospace Propulsion
Master of Technology in Aerospace Structure
Master of Technology in Computer aided designing
Master of Technology in Design Engineering
Master of Technology in Dynamics & Control
Master of Technology in Hydraulics
Master of Technology in IC engines
Master of Technology in Industrial Engineering
Master of Technology in Machine Design
Master of Technology in Manufacturing Engineering
Master of Technology in Manufacturing Systems Engineering
Master of Technology in Mechanical Handling and Automation
Master of Technology in Mechanical Handling and Automation
Master of Technology in Mechanical Systems Design
Master of Technology in Metallurgical Engineering
Master of Technology in Production Engineering
Master of Technology in Refrigeration and air conditioning
Master of Technology in Thermal and Fluids Engineering
Master of Technology in Thermal Energy and Environmental Engineering
Master of Technology in Thermal Engineering
Ph.D in any of the areas above