Mechanical Engineer

About the Role

A leading AI lab is hiring practicing mechanical engineers to improve how frontier models reason about real engineering work. You will judge task and answer quality, write the specs and reference solutions that define correct, and help build evaluations. The role is W-2 with Cincinnatus LLC, with an initial engagement of 2 to 3 months and a strong possibility of extension. Client-issued accounts and equipment are provided.

What You'll Do

• Review mechanical engineering tasks and model outputs for wrong assumptions, missing constraints, unit and tolerance errors and unsafe designs.
• Write instruction specs and worked reference solutions, and define new realistic tasks.
• Design challenging evaluation sets across mechanical design, thermal and fluid systems, structural analysis, manufacturing and controls.
• Calibrate standards with client researchers and specialists in adjacent fields.

Requirements

• Bachelor's degree or higher in mechanical engineering or a close discipline.
• 5+ years of hands-on industry experience owning real designs or analyses (FEA, CFD, drawings, design reviews, production).
• Fluency with tools such as SolidWorks, CATIA, NX, Creo, ANSYS, Abaqus or MATLAB, and codes such as ASME, ASTM, ISO and GD&T.
• Progression toward senior or lead responsibility; a PE license is a plus.
• Hands-on LLM use at work and strong written feedback skills.
• 40 hours per week for 2 to 3 months.

Compensation & Logistics

$60-$90 per hour, 40 hours per week. Remote within the United States. W-2 employment through Cincinnatus LLC, a legal entity separate from Mercor.