Martinez is the first Latino to represent Loudoun County in the Virginia House of Delegates and serves as one of three Co-Chairs of the Virginia Latino Caucus. His re-election in 2025 with 62.8% (up from 56.9% in 2023) demonstrates growing support in a rapidly diversifying Northern Virginia suburb. His next election is in 2027.
Martinez won HD-29 in 2023 with 56.9%) over Republican Jonathan Mark Rogers, then expanded his margin in 2025 to 62.8% against Scott Thomas (R). As a Co-Chair of the Virginia Latino Caucus alongside Phil Hernandez and Alfonso Lopez, he has helped develop the caucus's legislative agenda on immigration and Latino empowerment. Not up for re-election until November 2027.