Your can opt for a Post Graduation in Engineering or Management as it would be relevant to your graduation degree.
If you want to make a career in Engineering you can apply for M.E., M. Tech, M. S. or other similar courses. You have to appear for GATE or GRE or this.
If you want to pursue a career in Management you can appear for CAT and other management entrance examinations and complete your MBA or PGDM degree.
All the best!