After graduating in History, Mustafa Güler started his career as an educationist/pedagogue and served between 1994 - 2015 in International Schools in Siberia, Nigeria, England , Latvia , Sweden and Cambodia. Back in Turkey after 2015, he worked as the General President of the Trade Union "Pak Finans İş" until its closure with the State of Emergency Decree Nr. 667 . He was discharged of his duties 23.07.2016, as a result of the Turkish Governments purge against all its political opponents. He volunteered and contributed to the establishment of several NGOs in the above mentioned countries. He is currently living in Finland and is the Chairman of the Together Platform.