After working for various local media organisations, in 2013 she founded Xolobaj (Kʼicheʼ for 'a place between the stones'), a radio station focusing on indigenous and women's issues.
[1][3] On 24 August 2020, Mejía was the only journalist on the scene during a protest of predominantly Kʼicheʼ merchants who were calling on Joyabaj's mayor, Florencio Carrascoza, to reinstate their permits to sell produce, which had been temporarily revoked due to the COVID-19 pandemic.
Mejía broadcast the protest live on Xolobaj TV's Facebook page, which culminated with protestors looting Joyabaj's municipal buildings.
[4][6] Mejía's trial was delayed when, in April 2021, the allocated judge, Susy Peréz, was excused from the case after being accused of discrimination against indigenous people.
[1] During her tenure as a councillor, Mejía was critical of the Mayor of Joyabaj, Florencio Carrascoza, stating she and others were discriminated against by him due to being indigenous, and twice requested for the local judiciary to investigate his treatment of workers.