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. Call today for a reasonable price quote and quick turnaround.