Ramos was in private practice in Corpus Christi, Texas, from 1991 to 1997 and again during 1999 and 2000.[3]
State judicial service
She served as a judge of the Corpus Christi Municipal Court from 1997 to 1999.[3] From 2001 to 2011, Ramos served as a judge of the 347th District Court.[3][4]
In August 2016, Ramos ruled in a case accusing the state of misleading voters without IDs. Ramos ruled that the U.S. Department of Justice alleged officials used news releases, a website and resources for training election officials to narrow "dramatically the scope of voters protected".[7]
On April 10, 2017, Ramos ruled that Texas' voter ID law was passed in 2011 with the intent to discriminate against minority voters. On April 27, 2018, the United States Court of Appeals for the Fifth Circuit reversed Ramos' ruling, upholding the Texas voter ID law in a 2–1 vote.[8]