ASNT Level III (Level 3) Consulting & Outsourced NDT Level III Services
Atlantis NDT provides independent ASNT Level III consulting and outsourced NDT Level III services for inspection contractors, owner-operators and EPCs worldwide. Our 50+ ASNT Level III professionals author and approve written practices, develop and certify NDT procedures, qualify Level I/II personnel, and provide audit and expert-witness support on a retainer or per-engagement basis.
What our NDT Level III consulting services cover
Written-practice authoring to SNT-TC-1A, CP-189 and NAS 410; procedure development and approval for UT, PAUT, TOFD, RT, MT, PT, ET and VT; personnel certification and eye-exam administration; method and equipment validation; and quality-system audit support for ADNOC, Saudi Aramco, QatarEnergy, NRC and ISO 9712 / Nadcap programs. We act as your responsible Level III services provider so you can bid and execute NDT scopes without carrying a full-time Level III on staff.
Outsourced Level III with a clear SLA
Most procedure reviews and written-practice updates are returned within 2 to 5 business days, signed and stamped. Engagements scale from a single procedure approval to a full multi-method NDT program. Independent ASNT Level III consulting typically runs 1,500 to 3,500 USD per day depending on method and travel, with retainers available for ongoing NDT Level 3 consulting services.
An outside agency Level III cannot certify your employees under SNT-TC-1A. Certification is granted by the employer, so an external Level III writes and approves the written practice, prepares and grades examinations, and provides technical oversight, while your company remains the certifying body and signs the certificates.
This distinction decides audits and it is the question the market answers worst. SNT-TC-1A is an employer-based recommended practice: the employer establishes a written practice, and the employer certifies its own personnel against it. An outside agency contracted for Level III services supplies the authority the employer lacks in house — authoring or approving the written practice, developing and administering examinations, approving procedures, and providing the technical judgement an assessor expects to find. What it cannot do is become the certifying body. Certificates are issued by the employer and signed under the employer written practice. Contracts that blur this produce findings, because the assessor traces certification authority back to a company that never held it. NAS 410 handles the same problem differently by designating a Responsible Level 3, which may be an outside individual, named in the employer procedure.
Source: ASNT SNT-TC-1A (2024 edition); ANSI/ASNT CP-189; NAS 410 for the aerospace Responsible Level 3 route
Technically reviewed by Anoop Rayavarapu — ASNT NDT Level III (UT, RT, MT, PT, VT, ET) · API 653 · ISO 9001:2015 Lead Auditor
What an outside agency Level III can and cannot do under each scheme
Activity
SNT-TC-1A
CP-189
NAS 410
Author or approve the written practice
Yes, as the approving Level III
Yes
Yes, as Responsible Level 3
Prepare and grade examinations
Yes
Yes
Yes
Approve NDT procedures
Yes
Yes
Yes
Certify the employer personnel
No — the employer certifies
No — the employer certifies
No — the employer certifies
Be named as the accountable Level III
Yes, by employer designation
Yes
Yes, named in the procedure
Sign certificates on the employer behalf
No
No
No
SNT-TC-1A is a recommended practice using "should"; CP-189 is a standard using "shall". An employer commits to specific numbers in its own written practice, which is what an assessor audits against.
Can an outside agency certify my NDT employees?
No. Under SNT-TC-1A certification is employer-based, so your company issues and signs the certificates. An outside Level III supplies the approving authority — written practice, examinations, procedure approval and oversight — but the certifying body remains you.
What does an outsourced NDT Level III actually deliver?
A written practice authored or approved to your scheme, NDT procedures approved for your codes, examinations prepared and graded per method and level, technical oversight during qualification, and a named accountable individual an assessor can identify in your documentation.
Our Level III resigned — what happens to our certifications?
Existing certifications remain valid, but the authority that approved them has gone. Until a replacement Level III is designated, no new personnel can be qualified, no procedure can be approved, and the next audit will ask who currently holds that authority. Designating an interim outside Level III closes the gap.
Is an outside Level III cheaper than hiring one?
For most contractors below roughly fifteen technicians, yes, because a staff Level III is a full salary against intermittent demand — written practice review, procedure approvals, examination cycles and audits. The comparison turns on qualification frequency rather than headcount alone.
Which scheme applies to my company — SNT-TC-1A, CP-189 or NAS 410?
Your customer contract decides. Aerospace work and Nadcap accreditation invoke NAS 410. Contracts specifying ANSI/ASNT CP-189 impose a standard using "shall" rather than a recommended practice. Absent either, SNT-TC-1A employer-based certification is the default across US industrial work.
Does an outside Level III cover a Nadcap audit?
A designated Responsible Level 3 satisfies the personnel-authority requirement under NAS 410, which AC7114 assesses. It does not by itself close the record findings that generate most Nadcap results — vision test currency, OJT documentation and retained examination papers remain the employer responsibility.
What an outsourced Level III engagement covers in practice
The functions, separated
Written practice authoring and annual review to SNT-TC-1A, CP-189, NAS 410 or ISO 9712 — including the review most quality systems commit to and few perform.
Procedure development and approval per method, qualified for the specific materials, thickness ranges and geometries in scope rather than written generically.
Personnel qualification: general, specific and practical examinations, vision examination administration, and reconstruction of training and experience records where they are incomplete.
Technique and equipment validation, including demonstration of coverage for phased array scan plans.
Named Level III of record on your written practice, available when a client audits the programme.
Independent review where a finding becomes contentious, including root-cause analysis and expert-witness support.
Turnaround and structure
Most procedure reviews and written-practice updates are returned signed and stamped within two to five business days. Larger scopes — building a multi-method programme, preparing an ISO 17020 accreditation package, standing up an RBI programme under API 580/581 — are scoped individually against a defined deliverable list. Engagements run per-project or on retainer; a retainer becomes the better arrangement once more than one client is auditing you.
What an engagement usually surfaces first
Technique sheets circulating in several uncontrolled versions beneath a controlled procedure.
Certification records complete for the certificate but missing vision examinations or documented on-the-job hours.
Calibration certificates held for instruments but not for probes, wedges and reference blocks.
No mechanism to recover which procedure revision applied to an inspection performed two years ago.
The first three are fixable in weeks. The fourth is structural, and it is why programmes that look compliant on paper still fail an evidence trace — see inspection management software for how that evidence is kept recoverable.
Under a SNT-TC-1A based programme the Level III is not an advisory role — it is the person who establishes and approves the techniques and procedures, interprets the codes and specifications the work is performed to, and takes responsibility for qualifying and examining the Level I and II personnel who carry it out. The Written Practice that governs all of that carries their name. When a client or accreditation body audits your inspection function, this is the role they ask about first, because everything downstream depends on it.
That is why the gap hurts disproportionately. An organisation can have competent technicians, calibrated equipment and sound procedures, and still fail an audit because nobody with the authority to approve those procedures actually did so.
Why organisations outsource it rather than hire
Level III capability is needed continuously but not fully occupied. Written practices are revised occasionally, procedures need approval when work changes, personnel need examining on a cycle, and audits arrive on somebody else's schedule. Between those events the workload does not justify a full-time appointment, and the skill is scarce enough that recruiting for it is slow and competitive.
Outsourcing converts that into an arrangement that matches the actual demand: the authority is available when it is needed, and the organisation is not carrying it when it is not. For companies operating across several sites it also gives one consistent technical position rather than each site interpreting the code its own way.
What the engagement covers
Written Practice — authored or reviewed against SNT-TC-1A or ANSI/ASNT CP-189, stating training and experience requirements by level and method, examination structure, vision requirements, and the certification and recertification rules you will actually be held to.
Procedure development and approval — technique-specific procedures written to the governing code, scoped narrowly enough to be demonstrable, with the approval signature that makes them valid.
Personnel qualification — general, specific and practical examinations administered and recorded, with the evidence retained in a form that survives staff turnover.
Audit support — attendance and technical response when a client, a certifying body or a regulator examines your programme, including closing findings properly rather than cosmetically.
Technique demonstration — where a code requires the procedure to be proven on representative geometry, running that demonstration and documenting it.
Independent review — a second technical opinion when an examination result is disputed, or when an in-house call carries commercial consequence.
SNT-TC-1A, CP-189 and ISO 9712 — which regime you are actually under
These are not interchangeable, and the choice is usually contractual rather than technical. SNT-TC-1A is a recommended practice: the employer certifies its own people against its own Written Practice, which is flexible and is why auditors ask to see that document rather than a certificate. ANSI/ASNT CP-189 is a standard rather than a recommendation, with fixed requirements and less latitude — contracts wanting consistency across suppliers often specify it. ISO 9712 certifies through an independent body, so the certificate belongs to the individual and travels with them.
Getting this wrong is expensive in a specific way: personnel qualified under one regime may not be accepted on a contract written around another, and that is usually discovered at mobilisation.
How this works alongside your own people
The common misconception is that an outsourced Level III replaces internal capability. In practice it more often builds it — the Level II who is ready to progress needs someone qualified to examine and mentor them, and that is exactly what an external Level III can provide while the organisation grows its own. Several clients use the arrangement as a bridge: outsourced while they develop an internal candidate, then advisory once that person is certified.
Frequently asked questions
Can an outsourced Level III sign our Written Practice?
Yes — that is one of the principal reasons to engage one. The Level III of record takes technical responsibility for the practice and the procedures issued under it. What matters to an auditor is that the person holds the certification for the methods in scope and that their involvement is real and documented, not that they are on your payroll.
Do we still need our own Level III eventually?
Not necessarily. Plenty of organisations run indefinitely with an external Level III, particularly where inspection is not their core business. Where volume grows to the point that approvals and examinations are needed continuously, bringing it in-house starts to make sense — and by then you usually have a Level II ready to certify.
Which methods can you cover?
UT, RT, MT, PT, VT and ET, plus advanced techniques including phased array and TOFD. Certification is granted per method, so the scope of any engagement states which methods the Level III is certified in — a point worth checking with any provider, since a Level III in one method is not a Level III in all of them.
How quickly can you take this on?
A written practice review and procedure gap assessment can usually start quickly, because it works from documents you already hold. Personnel examination is scheduled around your operation rather than ours. Tell us the deadline you are working to — an audit date, a contract award, a mobilisation — and we will say plainly whether it is achievable.
Three situations account for most engagements. A company wins work that requires a Level III
of record and does not employ one. A company employs one who is retiring, leaving, or already
oversubscribed across too many methods. Or a client audit has found the written practice,
procedures or technique qualifications inadequate and there is a deadline to fix it.
In each case the need is authority that can be exercised now — someone who can own the
written practice, approve procedures and technique qualifications, and stand behind them in
front of your client's auditor. That is a different purchase from
Level III training for one of your own people, which is the
right answer when the timeline allows it, and from
project-scoped NDT consulting, which solves a defined problem and ends.