[2] Werner worked in Freetown and in the Hague for five years (2003–2008) for the Office of the Prosecutor (OTP) of the Special Court for Sierra Leone (SCSL), prosecuting rebels of the Revolutionary United Front (RUF) and former Liberian President Charles Taylor.
[5] Between 2008 and 2017, alongside other projects, Werner worked for Reed Brody of Human Rights Watch on the case of the former President of Chad, Hissène Habré, and represented some of the victims for the two-year trial before the Extraordinary African Chambers in Dakar from 2015 to 2017.
Their focus was on crimes that had been committed in Liberia and on working with partners in Sierra Leone to obtain evidence on the trade by Western players of 'blood diamonds' In July 2024, Werner was registered on the list of Counsels admitted to appear in front of the International Criminal Court.
At that point, Werner decided to set out on his own network and, in September 2012, he founded Civitas Maxima, an organisation that focuses on the meticulous documentation of mass crimes, and pursuit of justice on behalf of the victims.
Emilie Romon, co-director of Ashoka Switzerland, stated that : "We selected Alain Werner as a fellow because of his vision, creative solutions, impressive impact and strong ethical fiber.