Professional Summary
Overview
Work History
Education
Skills
Certification
Timeline

Joseph Castro

Covina Valley Unified School District
Ontario
1
Certification
2
years of professional experience

Dedicated Maintenance Professional with experience in school facilities and HVAC systems. Skilled in preventive maintenance and hands-on repairs, adapting to daily priorities while ensuring safe work environments. Provides reliable support to maintenance and custodial teams, with a goal of advancing as an HVAC Tradesman following formal training at Mt. Sac.

Work History

Substitute Maintenance Worker/School Custodian

11 Months
Covina Valley Unified School District | 11.2025 - Current
  • Repaired HVAC, electrical, and carpentry issues using hand and power tools.
  • Prioritized maintenance requests across district sites.
  • Followed instructions from a supervisor regarding daily job tasks and duties.
  • Performed preventive maintenance on equipment to reduce downtime and support reliability.
  • Supported custodial and operations staff with setup, cleanup, and facility preparation tasks, as well as helping custodial staff with the deep cleaning of sites over the summer.
  • Collaborated with other team members to complete AC installation projects within deadline constraints.
  • Maintained positive relationships with coworkers by providing support for their tasks.

Heating, Ventilation, and Air Conditioning Installer

3 Months
Construction | 06.2024 - 09.2024
  • Installed heating, ventilation, and air conditioning systems according to lead plans and specifications.
  • Measured, cut, and fitted ductwork, piping, and mounting components for proper system alignment.
  • Demoed and assembled HVAC units, coils, furnaces, and ductwork using hand tools and power tools.
  • Tested system operation, airflow, and refrigerant performance to verify installation quality.

Education

High School Diploma

Northview Highscool | Covina, CA | 06-2025

Certificate of Completion - HVAC

Tri-Community Adult Education | Covina Ca | 06-2025

Skills

HVAC repair and maintenance
HVAC preventive maintenance
Event setup
Appliance maintenance
Custodial upkeep and deep cleaning of classrooms
Teamwork and collaboration

Certification

EPA 608 - Environmental Protection Agency Universal Certification for handling refrigerants

Timeline

Substitute Maintenance Worker/School Custodian

Covina Valley Unified School District
11.2025 - CurrentRead More

Heating, Ventilation, and Air Conditioning Installer

Construction
06.2024 - 09.2024Read More

Northview Highscool

High School Diploma
Read More

Tri-Community Adult Education

Certificate of Completion from HVAC
Read More
Joseph Castro