Owners Douglas Rice and James Hannon have backgrounds in dial retrieval media systems, language laboratories and television studios extending back to 1968 where they met at Chester Electronic Laboratories (CEL). CEL, founded by David Joslow, was a leader in the US marketplace for language laboratories and dial retrieval audio/video systems. As CEL employees, Jim and Doug were involved in all aspects of engineering, production, system sales, installation and service.

With the subsequent purchase of CEL by GTE Information Systems and eventual closing of that line, there were a growing number of 'box sale houses' that did not direct their efforts to the custom design, interface, installation, service and training of the box products they sold. As Chester Technical Services continued to service customers, this void was evident. In 1974 Chester Technical Services Incorporated in the state of Connecticut with the purpose of filling this void in the market.

In 1976 the decision was made to pursue a language laboratory line of equipment that would offer customers new language learning system opportunities. CTS entered into contractual agreements to market Sony AV Products in 1976. CTS maintained a strong relationship with Sony Electronics for 27 years offering design, sales, service and training to our customers. At the same time CTS continued to grow in size and offering new and innovative equipment and software to enhance our custom systems as the situation required.

In June of 2003 Sony appointed SANS Inc (Software and Networking Solutions Inc) as the exclusive licensor of all their software based language lab solutions, with limitless opportunity to expand.

Chester Technical Services, Inc., continues with SANS Inc. supporting the CTS existing customer base with repair parts for Sony analog labs, training and a now twenty-first century replacement: An all digital software based laboratory VIRTUOSO™ /SOLOIST®.