Demos Katsis was born in Limassol, Cyprus on the 1st of October, 1979. He is a founding partner of KATSIS LLC, Law Firm, with offices in Limassol and Nicosia and associated offices worldwide He was a partner in an international law firm before establishing KATSIS LLC. He is the elected Deputy Mayor of Limassol since the 1st of July 2024. 

He graduated with honours from the University of Bristol with a Bachelor of Laws and a Master of Laws. He also holds a Diploma in Professional Legal Skills from City University and MA from the University of Malta (awarded with a full E.U. scholarship ). Mr. Katsis is also a licensed insolvency practitioner. He was admitted to the Cyprus Bar in 2003 and is a member of the Cyprus Bar Association, among others. A number of his articles appear in several magazines. He is also a regular speaker in various seminars organised by various organisations. In addition, he holds the position of a professor in various universities. 

Mr Katsis was assistant National Rapporteur for Cyprus for the EU Project on Unfair Commercial Practices in the new Member States undertaken by the British Institute of International and Comparative Law. He was also assistant National Rapporteur for Cyprus for the EU Project on Legalisation of Public Documents undertaken by the British Institute of International and Comparative Law