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Job Description

Overview

Interstate Assembly Systems is seeking a skilled Field Service Mechanic to maintain and troubleshoot heavy-duty work trucks in the Phoenix Valley area. The role involves hands-on mechanical, hydraulic, and electrical repairs to ensure clients' fleets operate efficiently.

Responsibilities

  • Conduct routine maintenance and inspections on heavy-duty work trucks and their integrated systems.
  • 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.

Requirements

  • 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.

Benefits

  • Competitive Wages
  • Uniforms
  • Tool program
  • Tuition assistance
  • Health Insurance
  • Dental
  • Vision
  • PTO
  • Holidays
  • 401K
  • Long Term Disability
  • Short Term Disability
  • Life Insurance
  • Healthiest You
  • PPE Reimbursement
  • Pet Insurance
  • Employee Discounts
  • Paid Employee Assistance Program
  • Paid Health and Well-being screening

Additional Information

  • Position requires daily travel to customer job sites.
  • Occasional overnight travel may be necessary based on business and customer needs.

Benefits

Competitive Wages
Uniforms
Tool program
Tuition assistance
Health Insurance
Dental
Vision
PTO
Holidays
401K
Long Term Disability
Short Term Disability
Life Insurance
Healthiest You
PPE Reimbursement
Pet Insurance
Employee Discounts
Paid Employee Assistance Program
Paid Health and Well-being screening
Apply for This Position

How this job compares in Surprise, AZ

Pay in context

At roughly $45/hr, this posting sits about 61% above the $28/hr median for welding jobs across Arizona — toward the top of a $24–$37/hr middle band drawn from 199 postings with published pay. Put another way, it pays more than about 92% of the comparable postings we have wage data for. Pay that far above local median usually comes attached to something: a harder cert requirement, travel, night shift, or overtime that isn't really optional. Worth establishing which before you accept.

The local market in Surprise, AZ

Surprise, AZ currently has 5 other active welding openings besides this one, spread across 3 employers. 2 of them were added in the last week. Across Arizona as a whole we're tracking 513 other active welding openings from 247 employers. That's enough local activity to be worth comparing two or three offers before committing. Browse every welding job in Surprise, or widen the search to Arizona.

Interstate Companies, Inc. currently has 1 other opening live in Arizona, which is usually a sign of either steady growth or steady turnover — worth asking which in the interview.

The most active employers in Arizona at the moment, by number of open welding reqs, are Sundt Construction (31), Welding Shop in Phoenix, AZ (22), and EZARC (15). Volume like that usually means either a genuine expansion or a staffing agency working several client sites — worth knowing which before you apply.

Within Arizona, the best-paying metros we track by median hourly rate are Tolleson at $38/hr, Tempe at $32/hr, and Phoenix at $29/hr. If you can relocate or commute, that spread is worth factoring in.

What you'll be running

This posting calls for MIG, TIG, and Stick work. MIG (GMAW) feeds a continuous wire electrode through a shielding-gas nozzle. It lays down metal fast and is forgiving on clean material, which is why it dominates production and light fabrication work. TIG (GTAW) uses a non-consumable tungsten electrode with filler added by hand, giving the operator the most control of any process. It is slow, demanding, and the standard for stainless, aluminum, and anything where the bead has to look as good as it holds.

Similar openings near Surprise, AZ

Pay figures are medians computed from live postings in the Welding Pros index, not from survey data, and they move as employers post. Field Service Mechanic figures were last recalculated when this page was built.