Since 1989, Electronic Subassembly Inc, E.S.I., has been providing the greater Delaware Valley with high quality electrical builds. E.S.I. works directly with OEM’s from a wide array of fields on projects including: test and measurement, medical instruments, industrial controls, integrated circuits, and aerospace design. We’re capable of handling projects from single prototype production to the largest volume orders of production and full chassis builds. If you or your company builds electronic equipment, stop wasting time on inattentive manufacturers. Our work goes through multiple-parts inspection to ensure that our work meets or exceeds your customer standards. E.S.I. offers unmatched customer service. We are capable of working directly with you and your development team to help bring your creation to life. When you deal with E.S.I., price quotes are always realistic, turnaround time is as fast as you need your product, and the size of your order is never a problem.