Thomas joined the Maricopa County Attorney's Office as a Deputy County Attorney in 2003, then ran successfully for Maricopa County Attorney in 2004, having campaigned for state-based laws and initiatives against illegal immigration, pledging to pursue "fetal homicide" cases, and opposing same-sex marriage.
Thomas began working as a Deputy County Attorney in the Maricopa County Attorney's Office in 2003, then successfully ran for the position of Maricopa County Attorney in 2004. He campaigned on issues related to immigration, promising to handle 'fetal homicide' cases and opposing same-sex marriage.