Costas joined Hadjianastasiou, Ioannides LLC as a pupil advocate in 2009. He graduated from the University of Hull where he attained his LL.B. (Hons). Costas also holds an LL.M. in International Law from the University of Hull and in 2009 he was called to the Bar of England and Wales by the Honourable Society of the Middle Temple. In 2010 he was admitted to the Cyprus Bar and has since remained with Hadjianastassiou, Ioannides LLC as an associate.
His main areas of practice include corporate, commercial and civil litigation where he focuses on the handling of interlocutory injunctions, betting and gaming and tax law.