SGS Group SGS is the world’s leading inspection, verification, testing and certification company, headquarter in Switzerland. SGS is recognized as the global benchmark for quality and integrity. With more than 97,000 employees, SGS operates a network of over 2,600 offices and laboratories around the world. SGS-CSTC Standards Technical Services Co., Ltd SGS-CSTC Standards Technical Services Co. Ltd. was founded in 1991, with an extensive network of 78 branches and more than 150 laboratories we have more than 15,000 professionals working for us.