Costas is a founding partner in A. & E. C. Emilianides, C. Katsaros & Associates Ltd and a practicing lawyer in Cyprus, advising some of the biggest organizations of the island and a portfolio of international clients that operate in Cyprus and abroad. He was born in Thessaloniki, Greece. He graduated with grade excellent from the Law School of Aristotle University of Thessaloniki in 1999. In June of 1999 he received a scholarship for participating in a postgraduate seminar course in maritime law of Tulane University, New Orleans, US & University of Aegean. He completed his postgraduate studies in History, Philosophy & Sociology of Law (LLM) at the Aristotle University of Thessaloniki with grade excellent.

He has worked as an investment broker & trader, being certified as a derivatives consultant from ADEX (Athens Derivatives Exchange) in 2001 having succeeded in the exams for the relevant professional license, until his entrance as an advocate in Thessaloniki (Greece) Bar Association in 2002, where he has been a member for 15 years as a licensed advocate since 2008-2009 he has moved to Cyprus and contributed to the task of the new charter of the Orthodox Church of Cyprus and served as the legal advisor of the Holy Archbishopric of Cyprus and head of its legal activities and entities. He has been a visiting lecturer of University of Nicosia (UNIC) and published various scientific articles and lectures.

He has conducted various seminars/lectures on insolvency , Family Law, Consumer Protection Law, Banking  Law, Corporate Law, Shipping and other topics for the Association of Cyprus Banks (ACB), Cypriot Bar Association (CYBAR), Institute of Chartered Accountants of Cyprus (ICPAC), Association of Insurance Companies (AIC) and many other companies and organizations. He has significant administrative experience as he served as the Chairman of the board of one of the biggest media groups in Cyprus, Senior Independent Member of the Board of the biggest credit & financial institution of Cyprus (Bank of Cyprus), Chairman of the board of one of the biggest insurance companies of Cyprus (Eurolife), a board member of CNP Holdings and it’s subsidiaries, one of the biggest insurance companies of Cyprus and a member of CNP global group, Chairman of the supervisory board and member of the board of banking institutions abroad, Member of one of the biggest securities companies of Cyprus (Laiki Capital) and others. He serves as a non-executive board member of the biggest real estate fund of Cyprus (CYREIT Variable Capital Public Ltd). He also serves as a vice president of the Cypriot-Italian Chamber of Commerce and as a global advisory board member of Commonweatlh Enterprise and Investment Council (CWEIC)