Founded in 1972 by Theodore Mau,
Circuit Service Inc. (CSI) has built its reputation and standing as a Top 100 contract manufacturer by consistently producing high quality, competitively-priced products on time.

Throughout its 35-year history of expansions, critical industry certifications and technological advances, CSI boasts a financially sound foundation. Long-term employee retention, extraordinary manufacturing capabilities, a full-service business model, and a resolute commitment to excellence continue to be the cornerstones of CSI’s success.