Dr John Craig has performed over 500 (ISO9001) assessments and audits of large and small companies in the UK, China, Dubai, Germany, Greece, Hong Kong, Lithuania, Malaysia, Poland, Singapore, Switzerland, and Thailand for UKAS-accredited certification bodies. He also advises and sets-up management systems to meet the requirements of ISO9001 and will maintain these systems if required.

John has represented the UK in standardization fora in Europe, and chaired marketing and testing committees as well as promoting the concept of measurement uncertainty; he serves currently on an IEC committee for electro-magnetic compatibility.