The Maintenance Manager for a medicinal marijuana farm or cultivation facility oversees the physical plant, critical environmental systems, and production machinery to ensure high uptime, product quality, and strict regulatory compliance.
Job Functions
- Manage and troubleshoot complex HVAC systems, dehumidification and humidification units, CO dosing, airflow, and differential pressure controls.
- Oversee water treatment, fertigation systems, plumbing, and high-capacity irrigation infrastructure.
- Plan, schedule, and execute preventive maintenance (PM) programs and asset lifecycle plans.
- Repair or service industrial cultivation, trimming, drying, processing, and packaging machinery.
- Maintain facility security systems, backup power generators, fire protection, and building automation/controls (BMS).
- Ensure all maintenance, calibration, documentation, and equipment qualification align with state cannabis regulations, GMP (Good Manufacturing Practice), and GPP (Good Production Practice) standards.
- Maintain accurate logs for inspections, deviations, and CAPAs (Corrective and Preventive Actions)
- Maintain meticulous logs for all preventive maintenance, equipment calibrations, and repairs to comply with state and federal regulatory requirements.
- Onboard, schedule, and oversee specialized external contractors (e.g., structural greenhouse builders, commercial HVAC technicians).
Team & Vendor Management:
- Supervise internal maintenance technicians and schedule work orders using a CMMS (Computerized Maintenance Management System).
- Recruit, hire, train, and mentor the team of maintenance technicians, and facilities staff
- Conduct performance evaluations, set clear KPIs, and address performance or behavioral issues with HR.
- Coordinate outside contractors, service vendors, and capital projects while adhering to department budgets.
- Partner closely with cultivation managers, production leads, and HSE (Health, Safety, and Environment) teams.
- Train the team on OSHA regulations, Lockout/Tagout (LOTO), arc flash safety, hazardous waste handling, and correct PPE usage.
- Lead safety meetings and ensure a strict culture of workplace accident prevention.
- Act as the primary liaison between the maintenance department and Head Growers, Extraction Leads, and Processing Managers to align on maintenance schedules that do not disrupt sensitive plant growth or harvest cycles.
- Select, onboard, and supervise third-party contractors and specialized service technicians (e.g., commercial HVAC specialists, automated fertigation engineers).
Other duties as assigned.
Requirements and Qualifications
- High school diploma or GED required; a Bachelor’s degree in engineering, industrial maintenance, or a related field is often preferred.
- 3 to 5+ years of hands-on maintenance experiencein an industrial, manufacturing, or agricultural-production setting.
- 3 to 5+ years of hands-on maintenance experience 1 to 2+ years of supervisory or leadership experience.
- Strong working knowledge of industrial electrical systems, plumbing, and commercial HVAC/environmental controls
- Experience with Building Management Systems (BMS) and CMMS software.
- Must be at least 21 years old (or the legal age required by state law)
- Must be able to pass state background checks and register as an official cannabis industry agent
- Knowledge and experience with Enerama is a plus
Working Conditions
- Work is performed across diverse microclimates. Routinely move between hot, humid greenhouse zones, air-conditioned packaging rooms, and outdoor environments.
- Exposure to changing outdoor weather elements when servicing external greenhouse structures, roofs, fans, and utility hookups.
- Frequent exposure to high-intensity lighting, elevated humidity, organic plant materials, strong cannabis odors, and beneficial insects or allergens.
- Routine handling of or proximity to commercial fertilizers, sanitation chemicals, CO enrichment systems, and high-voltage electrical infrastructure.
- Requires a flexible schedule, including weekends, holidays, and extended hours. Must participate in a 24/7/365 emergency on-call rotation to respond to critical climate or power failures that threaten crop health.
Physical Requirements
- Ability to stand, walk, bend, kneel, crouch, and crawl for extended periods across concrete, gravel, and uneven agricultural surfaces.
- Capable of performing physically demanding labor for full 8- to 12-hour shifts.
- Must be able to safely lift, push, pull, and carry tools or equipment weighing up to 50 pounds independently.
- Comfortable working at heights on ladders, scaffolding, and scissor lifts (up to greenhouse roof levels), as well as inside tight mechanical rooms or crawlspaces.
- Excellent hand-eye coordination and fine motor skills required to operate precise hand tools, power equipment, and delicate calibration instruments.
- Normal visual acuity (with or without corrective lenses) to monitor system control screens and identify wiring color codes. Adequate hearing to detect mechanical anomalies or alarms in a loud machinery environment.
Green Sentry LLC will provide reasonable accommodations to qualified individuals with disabilities to enable them to perform the essential functions of the job, unless doing so would impose an undue hardship on the operations of the business.
Please note this job description is not designed to cover or contain a comprehensive listing of activities, duties or responsibilities that are required of the employee for this job. Duties, responsibilities and activities may change at any time with or without notice.
Green Sentry, LLC is an equal opportunity employer. In accordance with anti-discrimination law, it is the purpose of this policy to effectuate these principles and mandates. Green Sentry prohibits discrimination and harassment of any type and affords equal employment opportunities to employees and applicants without regard to race, color, religion, sex, sexual orientation, gender identity or expression, pregnancy, age, national origin, disability status, genetic information, protected veteran status, or any other characteristic protected by law. Green Sentry conforms to the spirit as well as to the letter of all applicable laws and regulations.