CNC Machining Expert - Evaluator - AI Trainer

Mercor; Detroit (MI); On-site; USD 55,000 - 75,000; Full time

Job summary

Mercor is seeking experienced CNC machinists to author and validate grading rubrics for CNC machining work. You will apply real production-floor judgment to approve or reject approaches for production runs and clearly explain your reasoning.

You will create objective, text-based rubrics, justify each criterion in writing, and review sample solutions to determine pass/fail outcomes. Strong 5+ years of CNC experience and fluent written English are required.

Qualifications

• 5+ years of hands-on CNC machining experience.
• Strong production judgment to determine safe production on real machines.
• Written English fluency for all text-based deliverables.

Responsibilities

• Contribute to text-only, objective rubrics for grading CNC machining solutions based on CAD models and context.
• Write clear verification rationale for each criterion.
• Review sample solutions and explain pass/fail outcomes.

Skills

Production judgment

Written English fluency

Hands-on CNC machining

Job description

About the roleWe're building a high-quality evaluation dataset for CNC manufacturing and are looking for experienced CNC machinists to help author and validate grading rubrics for CNC machining work. You'll bring real production-floor judgment to determine whether a machining approach would be approved or rejected for a production run, and clearly explain your reasoning.

What you'll do

• Contribute to text-only, objective, verifiable rubrics for grading CNC machining solutions across provided CAD models and machining context (stock, machine, tooling).
• Write clear verification rationale for each criterion.
• Review sample solutions and explain pass/fail outcomes.

Minimum requirements

• 5+ years of hands-on CNC machining experience.
• Strong production judgment - able to tell what would and wouldn't run safely on a real machine.
• Written English fluency (all deliverables are text-based).

Preferred

• Experience with hobbyist machines (Makera Carvera) and Haas machines (VF-2).