Field Diesel Technician

Job Description:  (Field Based-Specialized Role) Diesel Technician

Organization: Shafer, Troxell & Howe or STH LLC. (dba STH)

Job Location: Frederick, MD

FLSA Status: Non-Exempt

Pay: Hourly

Base Pay Range: $35.00-$46.00/hr

Job Description

Looking for a rewarding field-based role where you deliver customer success and still make it home every night? Join us as a Diesel Technician!

The Diesel Engine Service Technician is responsible for diagnosing, servicing, and maintaining diesel engines and related systems in a safe, efficient, and customer-focused manner. This role requires mechanical and technical expertise, a strong understanding of diesel systems (both mechanical and ECM-based), and the ability to communicate effectively with clients. The ideal candidate will demonstrate a commitment to safety, professionalism, continuous learning, and promoting the company’s values and services while on-site.

Just a few of our amazing benefits

• Company vehicle
• 401(k) with company matching structure and vesting as of day one
• Comprehensive Medical, Dental, and Vision insurance
• Company paid employee Life Insurance
• Paid Time Off
• 10 Paid Holidays
• Team oriented work environment with company events
• Competitive wages (this position would be hourly + occasional overtime, double-time, and rotational, on-call incentives)

Job Responsibilities

• Diagnose issues in diesel engines and associated control systems accurately.
• Communicate effectively with internal teams and customers to explain findings and recommendations.
• Perform all tasks following strict safety protocols and company procedures.
• Complete time sheets, paperwork, and submit clear photos of completed work on the same day.
• Maintain clean and safe work environments—leaving job sites in better condition than found.
• Represent and promote the business to generate additional service opportunities.
• Use proper PPE and adhere to all safety requirements during service tasks.
• Participate in training and professional development sessions to continuously grow technical knowledge.
• Explain complex technical issues to customers in a clear, professional manner.
• Keep all relevant certifications current and compliant.

Required Qualifications

• Proven experience working with diesel engines, including both mechanical and ECM-controlled systems.
• Strong working knowledge of diesel engine components and their operations.
• Proficiency in using diagnostic tools and repair equipment.
• Experience in generator troubleshooting and preventative maintenance services (PMs).
• Excellent written and verbal communication skills.
• Strong organizational skills with the ability to complete documentation accurately and on time.
• Must be able to work independently while managing time effectively.
• High attention to detail and commitment to workplace safety standards.
• High School Diploma or Equivalency.
• Clean Driving Record.

Preferred Qualifications

• Advanced understanding of electrical systems within diesel engine platforms.
• Previous experience in a customer-facing field service role operating as a technician.
• Sales-oriented mindset, with a demonstrated ability to upsell PMs and additional service work.
• Track record of maintaining high customer service scores and productivity metrics.
• Familiarity with revenue tracking, call-back minimization, and productivity optimization.
• Strong problem-solving capabilities and mechanical aptitude.