Okay Kayhanlı graduated from Yıldız University, Kocaeli Engineering Faculty, Department of Industrial Engineering in 1994. He spent the first years of his business life in the textile industry in Adana, where he was born and grew up. Okay Kayhanlı, who started to work as a Management System Consultant within the body of Quality Center Co. Ltd. in Ankara in the 2000s, has provided counselling and training services in the fields such as Quality, Environment, Occupational Health and Safety, Energy Management in many sectors for 10 years. During this period, he participated in more than 1,000 certification inspections in many certification bodies with national and international accreditation.
In 2010, he founded the TÜRKAK-accredited Occupational Hygiene Laboratory, Güventest, and Çev-ka Danışmanlık (Consultancy), which provides licensed environmental consultancy and licensed joint health and safety unit services with his wife Esra Kayhanlı, who has worked in many private organizations on Management Systems. As a part of the Green Airport Project carried out within the scope of the Directorate General of Civil Aviation between 2010 and 2013, he provided Green Airport consultancy services to a large part of the national aviation industry, such as 95%, on behalf of Çev-ka Danışmanlık, and Carbon Footprint Calculation within the scope of ISO 14064-1.
Beginning from 2013, returning to the certification industry, he served as the Turkey Representative of some foreign certification bodies between 2013-2015. In 2015, he bought all the shares of QSI Certification, formerly known as GLOBAL Certification.
Okay Kayhanlı, who is still working as the General Manager of QSI Certification, also works as a lead auditor and instructor in ISO 9001, ISO 14001, ISO 27001, ISO 45001, ISO 50001 standards, and is also authorized as the Lead Verifier by the Ministry of Environment and Urbanization for Greenhouse Gas Verification.