Maintenance Supervisor

Peninsula Truck Lines, Inc.; Auburn (WA); On-site; USD 75,000 - 110,000; Full time

Job summary

Peninsula Truck Lines, Inc. in Washington state is seeking a Western Washington Maintenance Supervisor to lead the maintenance team, oversee PM programs, and ensure DOT compliance across trucks, trailers, and shop equipment.

You will manage vendor relations, control costs, leverage telematics, and drive safety‑first, data‑driven maintenance with KPI dashboards. Strong leadership, diesel tech background, and experience with maintenance management software are essential.

Qualifications

• 7+ years in diesel, heavy truck, or fleet maintenance.
• 5+ years of supervisory or management experience.
• Knowledge of commercial truck repair, diagnostics, and PM standards.
• Experience with DOT/FMCSA regulations and documentation.
• Proficiency with maintenance management software.
• CDL license a plus.

Responsibilities

• Manage PM schedules, inspections, and repairs for tractors, trailers, and related equipment.
• Ensure all vehicles comply with DOT, OSHA, and company safety regulations.
• Track maintenance records, warranties, recalls, and compliance documentation.
• Supervise and develop maintenance technicians, scheduling workflow and setting performance expectations.
• Provide training related to new technologies, diagnostic tools, and OEM digital platforms.
• Foster a safety-first, collaborative, and continuous improvement culture.
• Collaborate with dispatch and operations to schedule maintenance without affecting delivery timelines.

Skills

Fleet maintenance

Supervisory experience

Diesel technology knowledge

DOT/FMCSA regulations

Maintenance software

Communication & leadership

Education

Technical certification or degree in diesel technology or related field

Tools

Maintenance management software

Job description

JOB SUMMARY:

The Western Washington Maintenance Supervisor (WWMS) is responsible for overseeing, planning, and coordinating all maintenance activities related to company-owned trucks, trailers, and shop equipment. This role assists in ensuring that all fleet assets are safe, compliant, reliable, and maintained in accordance with company standards and DOT regulations. The WWMS will lead the Western Washington maintenance team, manage vendor relationships, control costs, have oversight of preventive and predictive maintenance programs, effective use of technology-based fleet management systems, and collaborate with operations to minimize downtime and maximize asset lifecycle.

KEY RESPONSIBILITIES:

Fleet Maintenance & Compliance

• Manage Western Washington preventive maintenance (PM) schedules, inspections, and repairs for all tractors, trailers, and related equipment.
• Ensure all vehicles comply with DOT, OSHA, and company safety regulations.
• Track maintenance records, warranties, recalls, and compliance documentation.

Leadership & Team Management

• Supervise and develop maintenance technicians, scheduling workflow and setting performance expectations under the direction of the Corporate Maintenance Manager.
• Provide training related to new technologies, diagnostic tools, and OEM digital platforms.
• Foster a safety-first, collaborative, and continuous improvement culture.

Technology & Data Management

• Ensure all work orders, PM schedules, repair histories, inspections, and parts usage are accurately recorded in the system.
• Leverage telematics, ELD, and diagnostic data for proactive and predictive maintenance scheduling.
• Responsible for managing Western Washingtons data-driven maintenance reports and KPI dashboards (e.g., cost per mile, downtime, PM compliance rate).

Budgeting & Cost Control

• Monitor inventory levels and approve parts orders while minimizing waste.

Tire Program Management

• Manage Western Washington tire inventory levels and ensure accurate tracking of casings and tread life.
• Oversee service companies, verify billed hours and rates, and ensure performance aligns with expectations.
• Maintain and monitor steer-tire standards.
• Oversee the seasonal tire changeover program as needed in Western Washington.

Oil Analysis Program Management

• Maintain oil analysis sample kit inventory and replenish as required.
• Follow up to ensure completion of recommended repairs and subsequent verification samples.

Operational Support

• Collaborate with dispatch and operations to schedule maintenance without affecting delivery timelines.
• Provide timely updates on equipment status, repair ETAs, and fleet availability.
• Coordinate responding to breakdowns, emergencies, and roadside assistance situations.

Qualifications

QUALIFICATIONS:

• 7+ years of experience in diesel, heavy truck, or fleet maintenance.
• 5+ years of supervisory or management experience.
• Strong knowledge of commercial truck repair, diagnostics, and PM standards.
• Experience with DOT/FMCSA regulations and documentation requirements.
• Proficiency with maintenance management software.
• Excellent communication, leadership, and organizational skills.
• Technical certification or degree in diesel technology or related field.
• CDL license a plus.