Professor Tzanakopoulos is a general international lawyer and has published in a number of areas including international disputes, the UN Security Council, the law of treaties, the law of the sea, and international investment law. He has advised states, international organizations, and private entities on matters of public international law. He has advised and assisted counsel and members of tribunals or provided expert opinions in a number of cases before international and domestic courts and tribunals, including the International Court of Justice, EU courts, the European Court of Human Rights, ad hoc and ICSID arbitral tribunals, and the High Court of England and Wales. He has also provided training on international law to domestic judges, as well as diplomats, military officers, and other government officials.
- International law
- Law of war and armed conflict
- Law of state responsibility
- Law of international organisations
- Law of treaties
- Law of the sea
- International investment law
- International human rights law
Professor Tzanakopoulos has experience in working with radio, TV and print. He has appeared on the BBC World Service, CNN, Deutsche Welle, Al Jazeera, China Central Television and other national and international broadcasters, and has provided commentary or quotes for news agencies such as Reuters and the Press Association.