**Description:** Responsible for installation, maintenance, and repair of air-conditioning and refrigeration systems. Diagnoses faults, performs preventive maintenance, ensures optimal performance and energy efficiency, and complies with safety standards. **Qualifications:** + Technical certificate or diploma in HVAC/Refrigeration or related field + 2–3 years of relevant experience + Knowledge of AC systems, chillers, and refrigeration units + Certification in refrigerant handling (preferred) + Basic troubleshooting and safety knowledge **Primary Location:** MP-GU-Tumon **Organization:** Hyatt Regency Guam **Job Level:** Full-time **Job:** Engineering/Facility Maintenance **Req ID:** TUM000317 Hyatt is an equal employment opportunity and affirmative action employer. We do not discriminate on the basis of race, color, gender, gender identity, sexual orientation, marital status, pregnancy, national origin, ancestry, age, religion, disability, veteran status, genetic information, citizenship status or any other group protected by law.