Griego worked as an international economist for the Department of Labor, and as a specialist in Latin American labor issues. He also served as Assistant Cabinet Secretary, New Mexico Economic Development Department, 2005–2007. He has served as executive director, New Mexico Voices for Children, 2009–2012. He became more active in politics, and in 1999 he was elected as a Democrat to the Albuquerque City Council, serving until 2004. In 2008 he was elected to the New Mexico State Senate, serving until early 2013. In 2012 Griego ran in the Democratic primary for the nomination to the US House of Representatives seat from
New Mexico's 1st congressional district. It was a three-way race, won by
Michelle Lujan Grisham. She also won the general election. She has since been elected as governor of the state. In 2016, Griego became the New Mexico director of the
Working Families Party. In 2023, Griego obtained a fellowship with the
Fulbright Program. == Personal life ==