Devon Modlin graduated from San Diego State University, earning a Bachelor of Science degree in Kinesiology, with a minor in Business Administration. She began her career with the Kern County Probation Department in 2005, as a Group Counselor assigned to the Youth Detention Center. In 2007, she was promoted to Deputy Probation Officer and held various assignments, including Early Intervention Program, Juvenile Investigations, Youth Supervision, Youth Court and Community Schools and Court Hearing Officer. In 2020, she was promoted to Probation Supervisor and assigned to the Youth Placement Supervision unit and then later transitioned to Juvenile Investigations. In 2025, Devon was promoted to Assistant Probation Division Director and assigned to the Youth Detention Center. In 2026, Devon was promoted to Probation Division Director of the Youth Court and Programs division.