 Pari gbolohun yii: Addo bẹrẹ iṣẹ ikẹkọ rẹ pẹlu ile-iṣẹ rẹ tẹlẹ Hamburger SV ni ọdun 2009, ninu ilana ti o ṣiṣẹ bi olukọni ẹgbẹ ọdọ ati oluranlọwọ alakoso titi di ọdun 2015. Ni Oṣu kejila ọdun 2013, Addo ni a yan gẹgẹbi oludari oludari ti ẹgbẹ bọọlu afẹsẹgba orilẹ-ede Ghana ati ṣaaju 2014 FIFA World Cup ati : 2015 Africa Cup of Nations, tó gba ipò Ibrahim Tanko lẹyìn 2012 Africa Cup of Nations àti 2013 Africa Cup of Nations. 