She previously served as a House of Representatives MP for Yankin Township Constituency from 2016 until her removal from office in the 2021 Myanmar coup d'état.

In 1998, she was arrested at a peaceful protest rally for reading a poem and statement calling on the military government to respect the results of elections.

[6][8] Zin Mar Aung has founded a number of civil society groups dealing with democratic development, women's empowerment, ethnic tolerance, and providing assistance to former prisoners of conscience.

At the time, she was recognized by U.S. Secretary of State Hillary Rodham Clinton as a recipient of the annual “International Women of Courage Award”.

[11] In the 2020 Myanmar general election, re-elect House of Representatives MP for Yankin Township but was not allowed to assume her seat due to a military coup.