Eighth grade. Must possess a Miami-Dade County Certificate of Competency as a Journeyman in Refrigeration/Air-Conditioning Maintenance and Installation. Must possess a Driver license. Must possess a Type II or Universal certificate from an EPA recognized certification program in refrigerant transition and recovery service practices in accordance with EPA 40 CFR, Part 82 regulations. Must be able to work a permanent or rotating shift schedule to include nights, weekends, and holidays. Applicants qualifying for employment with the Miami-Dade Aviation Department will be subject to extensive security screening, including but not limited to fingerprint checks, employment verification, and other such procedures as may be mandated by federal requirements. The security clearance required by federal law is a continuing condition of employment.