An MEP electrical engineer works on mechanical, electrical, and plumbing systems. Your duties in this career usually focus on working to plan and design one or more of these systems for new construction projects. You may work with other engineers and architects in order to design systems that meet the criteria and requirements set forth by lead engineers and architects. Your responsibilities often start with drafting a design for a system using computer-aided design (CAD) software. You then visit the work site to oversee the implementation of your designs and troubleshoot or alter the plan if necessary.