Jan Hamák has been working with CELLO since 2016 as a consultant for self-advocacy. He has been an active member of the self-advocacy group Alone and together (founded by Jan Šiška) for twenty years. The group activity is best documented by the increase in the frequency of meetings from once a month, over one in fourteen days, to once a week. For example, the group has also been involved in the simplifying of the text and the final graphic design of the Convention on the Rights of People with Disabilities.
Jan maintains regular contact with other groups of self-advocates, performs throughout the country as a motivational speaker and helps to establish new groups of self-advocates.
Since spring of 2016, he has been working as an assistant in a multinational IT company. He is also a member of the Human Resources Department there and together with his colleagues he actively passes his experience of supported employment: he teaches HR specialists and the personnel of governmental institutions.