TQCS International (TQCSI) is a fully accredited, third-party certification body providing auditing and certification of international management system standards, particularly for Quality (ISO 9001), Environmental (ISO 14001), Food Safety (ISO 22000, FSSC 22000 and HACCP), Safety (ISO 45001), Asset Management (ISO 55001) and Information Security (ISO 27001). TQCSI also certifies companies to the QHSE and ISMS Codes, and audits organisations to the jobactive program.

TQCSI commenced operations in 1995 following a demand from Australian businesses for a customer-focused certifier. The Company was formally accredited by the Joint Accreditation System of Australia and New Zealand (JAS-ANZ) in 1996, commenced international operations in 1999 and, in March 2001, TQCSI established its first overseas office and commenced international operations. 

TQCSI Mongolia found in 2019 is a licensed regional office of TQCSI. In 2021, it commenced first certification audits on Mongolian organizations. As a regional office in Mongolia, TQCSI Mongolia employs qualified management system auditors who are Mongolian nationals.