Yangos Hadjiyannis studied at the University of Nottingham where he has earned an LL.B. with First-Class Honours. He then moved to the University of Cambridge (Trinity Hall) where he has earned a Postgraduate Diploma in Management Studies and the next year he has earned an LL.M. in International Law with First Class Honours. Achieving 1st place among Law students at Trinity Hall College, he was proclaimed a Bateman Scholar for Academic Excellence. He moved back to Cyprus in 2007 where he has successfully completed the Cyprus Bar Examinations and became a member of the Cyprus Bar Association. In May 2022 he completed successfully the "Authentic Leadership Development" programme at Harvard Business School. On 27 July 2022 he received an Honorary Doctorate of Business Administration by the University of West London.

From 2008 to 2019, he was the Deputy Director-General of CIM-Cyprus Business School, in charge for business development and strategy. Since 2020 he is the Chief Executive Officer. He is an Independent Non-Executive Director at KEDIPES (Cyprus Asset Management Company), member of the Board of Directors of CIPA (Invest Cyprus) and member of the Executive Committee of the Cyprus Employers & Industrialists Federation (OEB). He is also advisor to many companies on issues of strategy and management.

In recent years, he took up a research interest in Economics and Financial affairs and he has published various Articles with the local and international press. He is a commentator for the local media on financial affairs and as such he is regularly hosted on TV and radio.