Costas is a specialist in the field of International Taxation and he is a regular speaker at various seminars that are being organised in Cyprus and abroad. He is the author of numerous Tax related articles in professional publications in Cyprus and the US. Costas has been active in advising clients on how to efficiently structure their international tax affairs through Cyprus. He is also responsible for the International Executive Services unit within 乐鱼（Leyu）体育官网, a unit which advises High Net Worth individuals on personal taxation issues.