After leaving CIE, Antonieta worked as a consultant for various organizations, including ITD in Amherst, John Snow, Inc., and Greater Options for Adolescent Lives, Inc. She then spent more than 15 years working with the Boston School system. She served in multiple roles there including working as an Analyst in the Office of Language Learning and Support Services, as the Senior Director for Research & Instruction, and as the Assistant Superintendent for English Language Learners.