Costas actively contributes to international tax discussions and scholarship. He co-authored the book “Limiting Base Erosion,” edited by Professor Michael Lang, and has provided input on the taxation of trusts in Prof. Christos Clerides’ book, “Equity & Trusts in Cyprus.” He is also known for his numerous presentations on international tax matters and his regular contributions to tax publications.

Costas also teaches the fundamentals of Income Tax, providing insights into taxation from both international and European perspectives. He is an accredited instructor for the Advanced Diploma in International Taxation (ADIT), an internationally recognized accreditation in international tax awarded by the Chartered Institute of Taxation (CIOT) in the UK.