Born and raised in Dallas, Texas, Mejía joined the US Marine Corps after high school in order to provide for his family. In 2003, he participated in the invasion of Iraq, and as a result, has committed himself to critically struggling against US militarism in its various forms. He has been involved in anti-war work since 2012, joining About Face: Veterans Against the War, an organization that he still belongs to, and then the Grassroots Global Justice Alliance. GGJ hopes to contribute an analysis of the relationship between militarism and the extractive economy and identify opportunities to consolidate our membership to build a stronger movement against militarism and towards transformative justice.