He is also a former member and committee chairman of the Constitutional Assembly (1990-1991), where he drafted and led a number of reforms as Bulgaria sought to transform itself into a market economy. Since the 1990s, he has worked in Bosnia and Herzegovina, the Caucasus (Armenia and Georgia), Central Asia (Kazakhstan, Kyrgyzstan and Tajikistan), Russia and Montenegro, leading teams and occasionally subcontracted to the EU, USAID and the World Bank.