Professor Papatheodorou is an active university teacher. Since 2000, he has taught 18 postgraduate and 10 undergraduate modules at 10 universities in 5 countries. He has also supervised and/or co-supervised 20 PhD Theses in the UK and Greece and internally or externally examined 35 PhD Theses in the UK, Greece, Norway, Australia and New Zealand. He has been invited by many universities around the world to deliver lectures. He also collaborates closely with the Arab Air Carriers Organization (AACO) in the context of executive training for airlines in North Africa and the Middle East.