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Assistant Welding Inspector Jobs in St Louis, MO

Express Saint Louis

Quality Inspector

Saint Louis, MO · On-site

$18 - $24/hr

Read and interpret blueprints, engineering drawings, GD&T, and welding symbols * Perform gage ... Document inspection results, nonconforming material, and quality reports * Assist with root cause ...

TERRACON

Engineering Technician IV

Saint Louis, MO · On-site

Perform field and/or laboratory testing, observation, and inspection of Steel/Welding/Bolting ... May assist with scheduling and dispatch of Technicians to project sites. Adhere to strict safety ...

TERRACON

Engineering Technician IV

Saint Louis, MO · On-site

Perform field and/or laboratory testing, observation, and inspection of Steel/Welding/Bolting ... May assist with scheduling and dispatch of Technicians to project sites. Adhere to strict safety ...

System One Holdings, LLC

Quality Technician

Saint Louis, MO · On-site

$16.75 - $22.75/hr

Support vendor surveillance activities and arrange third-party inspections such as bolting, welding ... Oversee calibration of equipment and perform weekly quality audits. * Assist with internal audits ...

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Assistant Welding Inspector information

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How much do assistant welding inspector jobs pay per hour?

As of Sep 2, 2026, the average hourly pay for assistant welding inspector in St. Louis, MO is $25.49, according to ZipRecruiter salary data. Most workers in this role earn between $18.70 and $31.78 per hour, depending on experience, location, and employer.

What is an assistant welding inspector?

An Assistant Welding Inspector (AWI) supports senior welding inspectors in ensuring welds meet quality and safety standards. They assist in inspecting welds for defects, verifying compliance with codes and specifications, and maintaining inspection records. AWIs may also perform basic testing, monitor welder performance, and ensure proper welding procedures are followed. This role is often a stepping stone to becoming a Certified Welding Inspector (CWI) with additional experience and certifications.

What does an assistant welding inspector do?

A typical day for an Assistant Welding Inspector involves assisting with inspections of welds and materials, documenting findings, and ensuring compliance with project specifications and safety regulations. You may spend time both in the field—observing welding operations and performing measurements—and in the office, preparing inspection reports and reviewing project documentation. Collaboration with welders, quality assurance teams, and senior inspectors is frequent, as you help address issues and maintain production quality. The variety in daily tasks offers valuable hands-on experience and exposure to industry standards, which is beneficial for career progression in welding inspection.

What are the key skills and qualifications needed to thrive as an assistant welding inspector?

As an Assistant Welding Inspector, a solid understanding of welding processes, materials, and inspection standards—often supported by vocational training or an AWS (American Welding Society) certification—is essential. Familiarity with inspection tools such as calipers, micrometers, non-destructive testing (NDT) methods, and documentation systems is typically required. Attention to detail, effective communication, and teamwork are important soft skills in this position. These skills help ensure welded structures meet safety and quality standards while supporting senior inspectors and collaborating efficiently with production teams.

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Assistant Welding Inspector jobs near you
Infographic showing various Assistant Welding Inspector job openings in St. Louis, MO as of August 2026, with employment types broken down into 1% As Needed, 74% Full Time, 19% Part Time, 2% Temporary, 2% Contract, and 2% Nights. Highlights an 98% Physical, 1% Hybrid, and 1% Remote job distribution, with an average salary of $53,009 per year, or $25.5 per hour.

API Inspector/Certified Welding Inspector/NDT Tech

Nexorra Group

Saint Louis, MO • On-site

$60/hr

Full-time, Part-time, Per diem

Medical, Retirement

Re-posted 9 days ago

Job description

Job Title: Certified Welding Inspector (CWI) / API / NDT Technician

Location: Chesterfield, MO or Collinsville, IL (St. Louis Metro area)

Salary Range: $60,000 – $72,000 to start, with potential to increase as additional certifications (API, NDT Level II) are earned


Certified Welding Inspector (CWI) / API / NDT Technician

We are looking for a Certified Welding Inspector (CWI) to join our inspection and testing team serving clients throughout Missouri and Illinois. This role offers a mix of field and office work, with opportunities to expand your skills into API and NDT certifications through hands-on training and mentorship.


What You’ll Do

  • Perform field inspections of welded and bolted structural steel
  • Complete visual inspections and prepare detailed reports
  • Support API inspections of pressure vessels, storage tanks, and piping (training provided)
  • Assist with nondestructive testing (UT, MT, PT, MFE, and more)
  • Work directly with clients while representing the firm professionally


Must-Have Qualifications

  • AWS Certified Welding Inspector (CWI) — required
  • At least 2 years of welding inspection experience
  • Ability to work in the field (indoor, outdoor, and confined spaces) with some overnight travel
  • Strong written and computer skills for reporting


Great to Have (or Will Train You On)

  • API 510, 570, or 653 certifications
  • NDT Level II in UT, MT, PT, or MFE
  • Familiarity with AWS, API, ASME, and ANSI codes
  • Experience with load testing and advanced inspection methods


Why Join Us

  • Competitive pay with clear growth path ($60–72K starting, $80K+ with additional certifications)
  • Medical insurance and 401(k) plan
  • Per diem and mileage reimbursement for travel
  • Mentorship and training from senior inspectors (AWS, API, ASNT Level III certified)
  • Opportunity to grow your career with additional certifications


Workload: 75% field / 25% office

Office Base: St. Louis Metro East or West area