Posture: Frequent standing, kneeling/squatting, bending/stooping, pushing/pulling, and twisting; work in tiring and uncomfortable positions Motion: Frequent walking, climbing stairs/ladders/scaffolding, grasping/squeezing, wrist flexion/extension, and overhead reaching; frequent driving Lifting: Frequent heavy lifting and carrying (50 pounds and over) Environment: Work outside and inside, on slippery or uneven walking surfaces; frequent exposure to extreme hot and cold temperatures, dust, toxic chemicals and materials, noise, vibration, and electrical hazards; work around machinery with moving parts; may work in tight or enclosed spaces; may work alone; regularly work irregular hours; occasional prolonged hours; frequent districtwide travel Mental demands: Maintain emotional control under stress. Special Knowledge/Skills: Knowledge of service techniques for heating, air conditioning, and refrigeration Ability to read blueprints and schematics Ability to diagnose and resolve problems (troubleshoot) Must be familiar with current NEC and refrigeration (including HVAC) code books and revisions Ability to operate motor vehicle Ability to troubleshoot, diagnose, repair various kitchen equipment (coolers, freezers, warmers, ovens, steamers, etc.).