Charalambos is a certified public accountant in Greece and a partner at Chartered Accountants Moore Stephens S.A. since 2014. He is the head of the tax audit and corporate tax compliance department, and also the head of transaction services department. He is a member of the Tax Working Group of the Association of Certified Accountants in Greece.

He has participated in statutory and tax audits of companies in various sectors, mainly industrial and commercial companies and non-for-profit organizations. He has also undertaken projects related to corporate finance services such as due diligence, mergers and acquisitions (M&A), etc.