He was the leader of the Mongolian People's Revolutionary Party from 1991 to 1996, as its Chairman from 1991 to 1992 then as Secretary General from 1992 to 1996.
He graduated from the Mongolian State University (MSU) in 1968, earning his higher degree as a candidate of philosophy.
He served as an MPRP deputy to the People's Great Khural for the Ulaanbaatar 42 constituency (1990–1992).
He was an unsuccessful MPRP candidate for the Khövsgöl 47 constituency in the 1996 Great Khural election, and served as a political policy aide in the presidential secretariat (March–June 1997) before becoming the political policy aide to President Natsagiin Bagabandi from June 1997.
As of March 2009, Dash-Yondon was teaching at the Institute of Philosophy, Sociology, and Law of the Academy of Sciences.