Environment: Work inside and outside (moderate to extreme exposure to the sun, heat, cold, and inclement weather); moderate exposure to noise and vehicle exhaust; May work prolonged or irregular hours, occasional districtwide travel, position may require the need to be on call. Other: Specific hearing and visual requirements; may be subject to adverse and hazardous working conditions, including violent and armed confrontations; ability to control sudden violent or extreme physical acts of others and exhibit rapid mental and muscular coordination simultaneously.