Senior Metallurgist and Welding Inspector

You will review technical materials and inspection decisions used to train AI systems for advanced manufacturing and materials engineering. Your work will combine metallurgical analysis, welding inspection, coatings review, additive manufacturing assessment, and clear explanations of technical decisions.

You will make accept or reject decisions based on inspection evidence and applicable industry standards.

• Evaluate metallographic microstructures and determine material acceptability and conformance.
• Analyze heat treatment processes and acceptance evidence using AMS 2750, ASTM E112, and related US specifications.
• Assess weld quality through macro etch evaluation and apply Certified Welding Inspector acceptance criteria to case studies.
• Review industrial coating inspection evidence against NACE/AMPP and SSPC protocols.
• Identify and disposition defects in laser powder bed fusion additive manufacturing builds using build and cross-sectional data.
• Document accept or reject decisions with clear written and verbal explanations.
• Apply NADCAP, AWS, ASTM, and AMS standards across metal samples, weldments, coatings, and additive manufacturing builds.

This is a remote, part-time contractor opportunity.

• $40 to $60 USD per hour.
• Less than 20 hours per week.
• Remote work open to candidates in the listed countries, with US-based professionals preferred.
• Fluent English is required.
• At least eight years of hands-on experience making accept or reject decisions involving micrographs, weld macros, fracture surfaces, coatings, or laser powder bed fusion additive builds.
• Advanced knowledge of ASTM, AMS, AWS, NADCAP, NACE/AMPP, and SSPC standards.
• Experience in metallographic analysis, heat treatment evaluation, weld inspection, and industrial coating assessment.
• Strong technical writing, verbal communication, attention to detail, and ability to explain inspection reasoning clearly.
• Current or prior AWS Certified Welding Inspector credentials or an equivalent metallurgical certification are valuable.
• Familiarity with laser powder bed fusion processes and related defect mechanisms is useful.
• Experience collaborating digitally while managing deliverables independently is useful.

You apply here in about two minutes and finish on the hiring platform. The next step is a short AI interview (technical roles include a coding challenge). Passing it is how you qualify for paid tasks, so take it soon after you are invited.

AI training is the human work behind systems that learn from examples, reviews, and expert feedback. OpenTrain helps people find these projects, build a profile, and apply in minutes, while specialized expertise helps AI systems learn sound technical reasoning.