Liquid Plant Supervisor

Humic Growth Solutions LLC; Biola (CA); On-site; USD 70,000 - 100,000; Full time

Benefits offered by this job

Collaborative culture

Competitive compensation

Retirement plan

Paid time off

Career development

Job summary

Humic Growth Solutions LLC is seeking a Liquid Plant Supervisor in Biola, CA to lead daily liquid fertilizer production and drive safety, quality, and continuous improvement in a fast-paced facility.

You will oversee operations, mentor staff, coordinate maintenance, and ensure regulatory compliance while aligning with production KPIs and company goals.

Qualifications

• Minimum 4 years in manufacturing leadership roles.
• Experience with safety and GMP guidelines is preferred.

Responsibilities

• Supervise daily liquid fertilizer production operations on shift.
• Lead team to ensure safe, efficient, and consistent operations.
• Monitor schedules, output, inventory movement and priorities.

Skills

Leadership

Troubleshooting

Team leadership

Communication

Operations planning

MS Office

ERP systems

Education

High school diploma

Associate or bachelor preferred

Tools

NetSuite

Excel

ERP systems

Job description

If you are unable to complete this application due to a disability, contact this employer to ask for an accommodation or an alternative application process.

Full-time Regular Biola, CA, US

NutriAg by HGS is a fast-growing, agriculture-based manufacturing team. Our people are at the center of our success, and we are committed to building a supportive, growth-orientated workplace.

The Liquid Plant Supervisor is responsible for leading day-to-day production operations within a liquid fertilizer manufacturing environment. This role oversees liquid plant floor operations, employee performance, equipment reliability, safety compliance, product quality and production efficiency while serving as a hands‑on operational leader within the facility.

The ideal candidate is a strong manufacturing leader who can balance team leadership, production oversight, troubleshooting, and operational execution in a fast‑paced industrial environment. This individual will help drive safety, quality, productivity, continuous improvement, and equipment uptime while supporting overall plant performance goals.

Roles & Responsibilities

Production & Ops Leadership

• Supervise and coordinate daily manufacturing operations during assigned shifts.
• Lead production employees to ensure safe, efficient, and consistent operations.
• Monitor daily production schedules, output, inventory movement, and operational priorities.
• Ensure all production processes, batch documentation, batch and raw material quality testing and operational records are completed accurately and timely.
• Support startup, shutdown, and changeover activities across production lines and equipment.
• Review raw materials, in-process production, and finished goods to support quality and operational standards.
• Ensure raw material counts for all production batches prior to release to liquid plant staff.
• Communicate production updates, operational concerns, staffing needs, and shift performance to plant leadership.
• Assist in maintaining production KPIs, operational dashboards, and inventory reporting.

Employee Leadership & Development

• Provide coaching, guidance, and leadership to manufacturing employees.
• Support onboarding and training of new employees on production processes, safety, and operational procedures.
• Assist with employee scheduling, attendance management, payroll review, and PTO coordination.
• Participate in performance management, corrective action, employee development, and recognition efforts.
• Foster a positive, accountable, and team‑oriented manufacturing culture.

Equipment & Maintenance Support

• Troubleshoot equipment and operational issues to minimize downtime and production interruptions.
• Coordinate and support routine maintenance, repairs, and preventive maintenance activities.
• Work closely with maintenance personnel and plant leadership to ensure equipment reliability.
• Assist with identifying maintenance needs, ordering parts, and supporting vendor coordination as needed.
• Support safe operation of production equipment, pumps, conveyors, mixers, motors, and related manufacturing systems.

Safety, Compliance & Continuous Improvement

• Promote and enforce all company safety policies, OSHA requirements, and GMP‑related operational standards.
• Lead and participate in safety meetings, trainings, and incident response activities.
• Ensure employees utilize proper PPE and maintain safe work practices at all times.
• Maintain a clean, organized, and inspection‑ready manufacturing environment.
• Identify operational improvement opportunities related to safety, quality, efficiency, waste reduction, and production flow.
• Assist plant leadership with continuous improvement initiatives and operational process enhancements.

Qualifications

• Strong leadership experience within a manufacturing, production, or industrial environment.
• Hands‑on mechanical troubleshooting and operational problem‑solving abilities.
• Ability to lead teams in a fast‑paced production environment with limited oversight.
• Strong communication, organizational, and interpersonal skills.
• Ability to prioritize tasks and manage multiple operational responsibilities simultaneously.
• Working knowledge of manufacturing equipment, production processes, and safety procedures.
• Basic computer skills including production reporting, payroll systems, inventory systems, and Microsoft Office.
• Experience with ERP or manufacturing systems such as NetSuite preferred.

Education & Experience

• High school diploma or equivalent required.
• Associate degree, technical certification, or bachelor’s degree preferred.
• 4–7 years of manufacturing, production, or industrial operations experience preferred.
• Previous leadership, shift lead, maintenance coordination, or supervisory experience strongly preferred.
• Experience within agriculture, biologicals, chemical, liquid processing, or industrial manufacturing environments preferred.

Physical Requirements

• Ability to regularly lift 50+ pounds.
• Frequent standing, walking, bending, kneeling, crouching, climbing ladders, and reaching overhead.
• Ability to work in dusty, hot, cold, noisy, and industrial manufacturing environments.
• Ability to work around moving mechanical equipment and industrial machinery.
• Ability to wear required PPE and work safely in production environments.
• Industrial manufacturing environment mixing liquid and powder raw materials.
• Exposure to production equipment, raw materials, forklifts, pumps, conveyors, and industrial processing systems.
• Fast‑paced manufacturing setting requiring flexibility, urgency, and strong operational leadership.
• Occasional overtime, weekend, or extended‑hour support may be required based on production demands.

What We Offer

• Collaborative, people‑first culture
• Competitive compensation and benefits packages
• Savings and retirements plan for employer match
• Paid time‑off
• Career pathing and developmental opportunities