CNC Machining Expert - Evaluator

Mercor; San Francisco (CA); On-site; USD 70,000 - 110,000; Full time

Job summary

Mercor in San Francisco is seeking an experienced CNC machinist to help author and validate grading rubrics for CNC machining work. You will 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.

The role focuses on text-based deliverables, rubric verification, and review of sample solutions to explain pass/fail outcomes, with emphasis on safety and manufacturability on Haas/Makera

Qualifications

• 5+ years of hands-on CNC machining experience.
• Strong production judgment to determine what would and wouldn't run safely on a real machine.
• Written English fluency required for text-based deliverables.

Responsibilities

• 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.

Skills

CNC machining

Production judgment

Written English fluency

Tools

Makera Carvera

Haas VF-2

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).