🔍 2026 Salary Data
Defense NDT Inspector Salary — Level II & III
Non-destructive testing inspector pay in defense: Level II ($65–$85/hr), Level III ($95K–$135K/yr). ASNT SNT-TC-1A vs NAS 410 vs EN 4179. By defense corridor. Source: Research Report ID 969949, BLS OES 2025.
Short answer: NDT Level II in defense earns $65–$85/hr. NDT Level III (senior aerospace QA) earns $95K–$135K/yr — 15–30% above commercial. ASNT SNT-TC-1A is the baseline cert; NAS 410 required for aerospace defense work. Source: Research Report ID 969949.
NDT Inspector Pay by Defense Corridor (2026)
| Corridor / Base | NDT Level I | NDT Level II | NDT Level III | Primary NDT Methods |
|---|---|---|---|---|
| ⭐ Highest Huntsville AL (Redstone / NASA MSFC) | $40–$55/hr | $70–$90/hr | $110K–$135K/yr | UT, RT, MT, PT (aerospace/satellites) |
| San Diego CA (NAVFAC / Naval Shipyard) | $38–$52/hr | $65–$85/hr | $100K–$130K/yr | MT, PT, UT (naval vessels/submarines) |
| Seattle WA (Boeing / Navy) | $38–$52/hr | $65–$82/hr | $95K–$125K/yr | RT, UT, Phased Array (aircraft structures) |
| St. Louis MO (McDonnell / Boeing / NGA) | $36–$50/hr | $62–$80/hr | $95K–$120K/yr | UT, RT, ET (aircraft + defense manufacturing) |
| Oklahoma City (Tinker AFB) | $34–$48/hr | $58–$78/hr | $90K–$115K/yr | MT, PT, UT (E-3 AWACS, B-52, KC-135) |
| Warner Robins GA (Robins AFB) | $32–$46/hr | $55–$75/hr | $85K–$110K/yr | MT, PT, UT (C-130, F-15, Special mission) |
| Dayton OH (Wright-Patterson AFB) | $34–$48/hr | $60–$80/hr | $92K–$118K/yr | RT, UT, Phased Array (AFRL research, UAV) |
* NDT Level III rates shown as annual salary. Level II/III rates include premium for active Secret clearance. MT = Magnetic Particle, PT = Liquid Penetrant, UT = Ultrasonic, RT = Radiographic, ET = Eddy Current. Source: Research Report ID 969949, BLS OES 2025.
NDT Certifications for Defense Work
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1ASNT SNT-TC-1A — NDT Level II CertificationThe standard NDT certification for Level I/II inspectors in most defense and commercial applications. Covers four primary methods: MT (Magnetic Particle), PT (Liquid Penetrant), UT (Ultrasonic), RT (Radiographic). Each method is tested separately. Employer-written practice is required per SNT-TC-1A guidelines. Defense contractors with QA programs typically require SNT-TC-1A Level II in multiple methods. Source: ASNT, Research Report ID 969949.
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2NAS 410 — Aerospace NDT Certification (NASA Standard)The aerospace-specific NDT certification standard with stricter training hour and experience requirements than SNT-TC-1A. Required on NASA programs (MSFC, Marshall Space Flight Center in Huntsville), Boeing aircraft programs, and other aerospace DoD contracts. NAS 410 is increasingly specified on any program involving flight safety-critical structures — aircraft fuselages, missile casings, satellite structures. Source: NASA, Research Report ID 969949.
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3EN 4179 — European Aerospace NDT (International Programs)The European aerospace NDT personnel certification standard equivalent to NAS 410. Required on international defense programs and on programs where European prime contractors are involved. EN 4179 certified inspectors are preferred on cross-border defense programs (NATO joint programs, international aircraft programs). For US-based defense inspectors, SNT-TC-1A + NAS 410 is the primary path; EN 4179 becomes relevant on programs with international scope. Source: Research Report ID 969949.
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4AWS CWI — Certified Welding Inspector (for NDT QA leads)While not strictly an NDT method certification, AWS CWI is the standard QA inspector credential for defense welding inspection. CWI + NDT Level II is the common qualification for senior QA roles on defense construction and fabrication. CWI exam covers weld geometry, discontinuities, and acceptance criteria per AWS D1.1. Source: AWS, Research Report ID 969949.
Frequently Asked Questions
How much do NDT inspectors make in defense?
NDT Level II inspectors in defense earn $65–$85/hr. NDT Level III senior QA inspectors for aerospace and weapons manufacturing command $95K–$135K annually (~$48–$68/hr). These rates exceed commercial NDT by 15–30% due to the specialized knowledge required. ASNT SNT-TC-1A and NAS 410 certifications are the key credentials. Source: Research Report ID 969949, BLS OES 2025.
What is the difference between ASNT SNT-TC-1A and NAS 410 for NDT?
ASNT SNT-TC-1A is the general industry standard for NDT personnel certification — used in most commercial and defense applications. NAS 410 (NASA) is the aerospace-specific NDT certification standard with more stringent training hour and experience requirements. EN 4179 is the European aerospace equivalent used on international defense programs. Defense aerospace work (aircraft, weapons) often requires NAS 410 or EN 4179 in addition to or instead of SNT-TC-1A. Source: ASNT, Research Report ID 969949.
Which defense corridor pays NDT inspectors the most?
Huntsville AL (Redstone Arsenal + Army Aviation) pays the highest NDT salaries in defense. NASA MSFC, Army Futures Command, and USSPACECOM programs generate consistent NDT demand for missile, aerospace, and space structures. NDT Level III in Huntsville can earn $100K–$135K/yr on DoD aerospace contracts. San Diego NAVFAC and Boeing Seattle also pay premium rates. Source: Research Report ID 969949.
How do I become an NDT Level III in defense?
Path to NDT Level III: (1) Pass NDT Level II in at least one method (MT, PT, UT, RT) with 1,200+ hours of work experience; (2) Complete 40+ hours of classroom training in each NDT method; (3) Pass the Level III general exam (ASNT or relevant employer) plus method-specific exams; (4) For aerospace defense work, pursue NAS 410 certification through the relevant agency or contractor. Level III typically requires 5–10 years of NDT experience. Source: ASNT SNT-TC-1A, Research Report ID 969949.
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