Field Service Technician

Company: Interstate Companies Inc
Location: Fresno
Posted on: January 14, 2026

Job Description:

Job Description Job Description Job Title: Field Service Mechanic – Heavy Duty Work Trucks Location: Southern California Company: Interstate Assembly Systems Interstate Assembly Systems is a leading provider of heavy-duty work truck solutions, serving industries such as construction, mining, utilities, and more. We specialize in custom-built service trucks equipped with cranes, welders, air compressors, fuel and lube tanks and reels, hydraulics, and other advanced systems. We’re looking for a skilled and motivated Field Service Mechanic to join our team and keep our clients’ fleets running at peak performance This role requires a hands-on professional who can troubleshoot complex mechanical, hydraulic, and electrical issues in the field, ensuring minimal downtime for our clients working in the Southern California region. (Fresno, Ca. - South Los Angeles, Ca.) Pay Range: $28-$36/ Hour D.O.E. Key Responsibilities: Conduct routine maintenance and inspections on heavy-duty work trucks and their integrated systems (cranes, welders, air compressors, etc.). Diagnose and repair mechanical, hydraulic, electrical, and pneumatic issues on trucks and attached equipment. Perform welding and fabrication tasks as needed to repair or modify truck components. Operate and test cranes to ensure proper functionality and safety compliance. Service and maintain air compressors and other auxiliary equipment. Respond to client service calls in the field, providing timely and effective solutions. Document all service work, including parts used, time spent, and detailed repair notes. Adhere to safety standards and regulations, including OSHA and DOT requirements. Collaborate with clients to explain repairs and provide recommendations for preventative maintenance. Qualifications: Minimum of 3-5 years of experience as a mechanic working on heavy-duty trucks or equipment. Proven expertise in repairing hydraulic systems, cranes, welders, and air compressors. Strong knowledge of diesel engines, electrical systems, and heavy-duty vehicle diagnostics. Welding and fabrication skills (e.g., MIG, TIG, stick welding) preferred. Ability to read and interpret technical manuals, schematics, and diagnostic codes. Valid driver’s license required; CDL (Commercial Driver’s License) is a plus. Comfortable working independently in the field and in various weather conditions. Excellent problem-solving skills and attention to detail. Physical ability to lift to 50 lbs. and work in confined spaces as needed. Certification in crane operation, welding, or heavy equipment repair is an advantage. Employee Benefits: Competitive Wages – Be paid your worth! Uniforms - fully supplied by Interstate! Tool program - available Tuition assistance - for educational and ongoing career growth Health, dental and vision coverage - begins on the first day of the following month. Paid Time Off - (PTO) starts accruing day one of your full-time employment. Holidays - 6 Holidays and 2 Floating Holidays per year 401(K) - with company matching. Long Term Disability - Supplied Short Term Disability - Supplied Life Insurance - Supplied Healthiest You - Virtual Health Care paid by Interstate. PPE Reimbursement - Safety Glasses and Safety Boot Reimbursement Pet Insurance – We care about our furry friends! Employee Discounts - available on products and services Paid Employee Assistance Program - Free 24/7 Access to a guidance consultant regarding life challenges you or family member may face. Paid Health and Well-being screening - for employees and their spouse 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. Interstate Companies is an Equal Opportunity Employer, and we encourage all qualified and interested persons to apply for this position by submitting a resume for consideration. IPSRT Military Friendly Hiring.

Keywords: Interstate Companies Inc, Gilroy , Field Service Technician, Engineering , Fresno, California