Director of Finance for Precinct 4, Castrejon brings a strong background in both public sector and finance. He began his career as a Community Engagement Coordinator at Harris County Public Health, focusing on community outreach and volunteer efforts. Jonathan holds a BBA in Accounting and an MBA from the University of St. Thomas. 

Prior to joining Precinct 4 and Precinct4Forward, Castrejon served as a Grant Accountant and Accounting Manager at Career and Recovery Resources, a nonprofit dedicated to homelessness prevention. He also previously served as Budget Manager for Harris County Commissioner Precinct 1.