Costas obtained a BSc (Hons) in Management Science from the London School of Economics, an MSc in Accounting from the University of South Wales and is a Fellow of the Association of Chartered Certified Accountants.
Costas began his career in 1983 in the West End of London, working for a firm of Chartered Accountants. He subsequently moved to Commercial Banking in the City of London where he was appointed Chief Internal Auditor of the Commercial Bank of London Plc. Since 1989 Costas has been a practicing Chartered Certified Accountant and Registered Auditor.
In addition to being the Chairman of the "Power Snooker Group," Costas is also the Founder, Chairman, and CEO of the London-based multi-million-pound private equity organisation CAJ Group Ltd, also known under its corporate umbrella "The CAJ Group.” Costas's financial expertise is exemplary; he works in a systematic manner that ensures financial health, stability, and future growth.