Maintenance Supervisor

Motrex LLC; Milwaukee (WI); On-site; USD 75,000 - 110,000; Full time

Job summary

Stryten Energy is seeking a Maintenance Supervisor for its Milwaukee manufacturing site. You will supervise maintenance personnel, coordinate with planning and engineering, and drive a reliability-focused program to reduce downtime.

The role demands hands-on leadership, strong problem-solving, and a focus on safety and documentation in a 24/7 environment. You will oversee preventive and predictive maintenance, improve PM content, and lead root-cause actions to eliminate recurring failures while

Qualifications

• Minimum 5 years of industrial maintenance experience in a manufacturing environment.
• At least 3 years in a maintenance leadership, lead or supervisory role.
• High school diploma or GED required; related technical training preferred.
• Strong knowledge of electrical, mechanical, hydraulic and pneumatic systems.
• Experience with preventive and predictive maintenance and CMMS/work-order systems.
• Proven ability to lead technicians through breakdowns and drive permanent actions.
• Injection molding experience is preferred.

Responsibilities

• Provide direct supervision, coaching and accountability for maintenance personnel.
• Lead safe and timely troubleshooting and repair of production and facility equipment.
• Own execution of preventive and predictive maintenance and improve PM content.
• Drive elimination of recurring failures via root cause analysis and corrective actions.
• Coordinate with Planning, Engineering and Operations to minimize downtime.
• Ensure proper documentation of work, failure modes and parts used in CMMS.
• Support 24/7 maintenance coverage and critical plant emergencies as required.
• Manage outside contractors when needed and ensure safe completion.

Skills

Maintenance leadership

Electrical systems

Mechanical systems

CMMS

Root cause analysis

Education

High school diploma or GED

Industrial maintenance training

Engineering/technical degree a plus

Tools

CMMS

Job description

Overview

Stryten Energy manufactures proprietary and custom injection molding products serving the industrial lead battery, automotive and consumer markets. Stryten Energy is expanding battery poly manufacturing and recycling output to help solve industry-wide supply constraints.

The Maintenance Supervisor is responsible for the safe, reliable and effective execution of maintenance activities for the Milwaukee manufacturing operation. This role provides direct leadership to maintenance technicians, ensures high-quality repair and preventive maintenance execution, and drives accountability for equipment condition, recurring failure elimination and timely response to production needs.

A key expectation of this role is to help transition the maintenance organization from reactive breakdown response to a planned, preventive and reliability focused maintenance system. The Maintenance Supervisor partners closely with the Maintenance Planner, Engineering, Operations, Safety and Production Control to improve equipment uptime and restore critical equipment to OEM or established operating condition.

Responsibilities

Essential functions

• Provide direct supervision, coaching and accountability for maintenance personnel, including work assignment, shift coverage, training, performance management and development.

• Maintain strong floor presence and ensure maintenance resources are focused on the highest safety, quality and production priorities.

• Lead safe and timely troubleshooting and repair of production and facility equipment. Verify repairs are complete, technically sound and equipment is returned to a safe and reliable operating condition before closeout.

• Own execution quality for preventive and predictive maintenance. Partner with the Maintenance Planner to improve PM content, frequency and scope based on equipment failures, inspections and maintenance history.

• Drive elimination of recurring equipment failures through structured root cause analysis, corrective actions and verification of effectiveness. Escalate chronic or technically complex issues to Engineering with clear failure history and supporting information.

• Lead equipment restoration activities to return neglected or degraded equipment to OEM, design or established operating condition, including identification of mechanical, electrical, hydraulic, pneumatic, controls and safety-system deficiencies.

• Ensure maintenance technicians properly document work performed, failure modes, parts used, follow-up work and equipment condition in the applicable CMMS or maintenance system.

• Partner with the Maintenance Planner on weekly maintenance scheduling, backlog priorities, planned shutdown work, parts requirements and work-order readiness. The Supervisor owns execution and technician accountability; the Planner owns preparation, scheduling and system coordination.

• Support development and maintenance of critical spare parts requirements by identifying equipment risk, failure history and technical requirements. Ensure newly installed or modified critical components are communicated for system and spare parts updates.

• Ensure current electrical, mechanical, hydraulic and pneumatic documentation is used when available and that equipment modifications or field changes are communicated for documentation updates.

• Establish effective shift handoffs, off shift maintenance coverage and escalation expectations for the 24/7 operation. Respond to critical plant emergencies as required.

• Ensure safety critical equipment devices, including interlocks, alarms, emergency stops and protective systems, are maintained and periodically verified in accordance with plant standards and applicable requirements.

• Coordinate maintenance activities with Operations and Production Control to minimize production disruption and ensure clear communication of equipment status, expected repair timing and operational risks.

• Manage outside contractors when required and verify work is completed safely, to scope and to applicable plant standards.

• Support maintenance cost control by managing labor utilization, overtime, contractor use and repair decisions while balancing safety, reliability and production requirements.

• Participate in daily and weekly operating reviews and communicate major equipment losses, recurring failures, maintenance priorities, risks, corrective actions, owners and due dates.

• Support equipment installations, modifications, capital projects and commissioning activities in partnership with Engineering and other plant functions.

• Ensure compliance with Company requirements, OSHA requirements, LOTO procedures and applicable environmental and safety standards. Maintain clean and orderly maintenance work areas.

• Perform other responsibilities as assigned to meet business needs.

Qualifications

Education, Experience, Certifications

• Minimum 5 years of industrial maintenance experience in a manufacturing environment, with at least 3 years in a maintenance leadership, lead or supervisory role preferred.

• High school diploma or GED required. Industrial maintenance, electrical, mechanical or related technical education strongly preferred. Bachelor’s degree in Engineering or a related technical discipline is a plus, not required.

• Strong working knowledge of industrial electrical systems, PLC troubleshooting, mechanical systems, hydraulics and pneumatics. Experience with motors, drives, controls, heating/cooling systems and automated manufacturing equipment preferred.

• Experience with preventive and predictive maintenance, root cause analysis, equipment reliability improvement and CMMS/work-order systems.

• Demonstrated ability to lead technicians through breakdown response while also driving permanent corrective actions and prevention of recurrence.

• Experience in high volume manufacturing required. Injection molding experience preferred.

• Ability to read and interpret electrical schematics, mechanical drawings and technical documentation.

• Strong organizational, communication and prioritization skills with the ability to work effectively with Operations, Engineering, Safety, Quality and other plant functions.

• Ability and willingness to support a 24/7 manufacturing operation and respond to critical plant emergencies as required.

Competencies, Skills, Knowledge

• Reduction in unplanned equipment downtime and repeat failures.

• Improved PM execution quality and completion.

• Improved maintenance response, troubleshooting quality and repair verification.

• Reduction of overdue corrective maintenance and repeat work orders.

• Improved equipment condition and progress toward OEM or established operating standards.

• Effective technician utilization, development, accountability and shift coverage.

• Strong safety performance and compliance with maintenance safety requirements.

Physical Demands

This position requires regular work in a manufacturing environment and may require standing, walking, kneeling, crawling, stooping, climbing ladders or accessing platforms and equipment areas. The employee must be able to safely perform the essential functions of the role, with or without reasonable accommodation.

Environment/Schedule

This role is based at the Milwaukee, WI manufacturing site, which operates 24/7. The Maintenance Supervisor is responsible for establishing effective maintenance coverage and escalation protocols and must be available for critical plant emergencies as required.

Travel

Travel as required to meet business needs.

EEO Statement

Stryten Energy is an equal opportunity employer where an applicant's qualifications are considered without regard to race, color, religion, sex, national origin, age, disability, veteran status, genetic information, sexual orientation, gender identity or expression, or any other basis prohibited by law.

About Statement

Stryten Energy is a leading battery manufacturer and energy storage company providing one of the industry’s most comprehensive portfolios of battery technologies and energy storage solutions. The company designs, manufactures and distributes advanced lead, lithium and vanadium redox flow batteries for automotive, commercial vehicle, golf cart, material handling, specialty motive, aerial work platforms, floor care, data center, telecommunications, utility, industrial, military and government applications. Headquartered in Alpharetta, Georgia, Stryten Energy operates 15 manufacturing and component facilities across the United States, with additional manufacturing operations in Mexico and China and commercial offices throughout Europe and Asia. The company’s portfolio includes the Stryten Energy, C&D Technologies and Trojan Battery product brands, serving customers worldwide with reliable energy storage solutions for critical infrastructure, mobility and national security applications. Learn more at www.stryten.com.

Job Locations WI-Milwaukee

Requisition ID 2026-5909

Category Manufacturing - Maintenance

Position Type Regular Fulltime

Address 714 East Keefe Ave

Postal Code 53212

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