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Mercor · STEM & research

Physics - Research Collaborator

Listed on Mercor as “Physics - Research Collaborator

$70-$100/hrRemoteContractPaid in USD

What this actually is

You design problems that stump current AI models, evaluate AI reasoning against the correct answer, write rubrics, and provide expert feedback. Often the highest-paid category because the expertise pool is small. The platform title (Physics - Research Collaborator) reflects the rate band and the expertise required, not the day-to-day work.

Can you do this on your visa?

F-2 / F-4 / F-5 / F-6: open. E-1 to E-7: needs concurrent-employment permit. D-2 / D-4 students: S-3 permit, 20 hr/week cap. D-10 / D-8: case by case.

Korean tax on USD income

First 5 years in Korea: foreign-source income only taxed if remitted into Korea. After year 5: worldwide income. Full tax guide.

Original posting from Mercor

Join a leading AI lab’s cutting-edge research team to be at the core of the AI revolution, where your expertise fuels the development of the most advanced LLMs.

**1\. Role Overview**

We are seeking advanced Physics Researchers & PhD Students to contribute to a project supporting a frontier-model evaluation effort focused on physics reasoning and problem-solving. You'll design and validate challenging benchmark tasks to help surface and diagnose reasoning gaps in a target model. The work centers on building robust, real-world physics tasks with verifiable solutions and then analyzing model behavior.

**2\. Key Responsibilities**

  • Design challenging, real-world physics problems spanning areas such as classical mechanics, electromagnetism, quantum mechanics, thermodynamics, statistical mechanics, and other physics subfields.
  • Prepare all necessary components, including detailed problem statements, golden solutions, and evaluation criteria.
  • Evaluate the model's performance on the tasks.
  • Identify tasks where the target model fails, specifically classifying failures in physics reasoning and mathematical derivation.
  • Analyze model trajectories to observe and extract core capability loss patterns.

**3\. Core Qualifications**

  • Currently enrolled in or recently completed a PhD program in Physics or a closely related field (e.g., Astrophysics, Applied Physics, Condensed Matter) at a top-tier university.
  • Deep expertise in one or more subfields of physics, with strong mathematical and analytical skills.
  • Ability to write clear, rigorous, and well-structured physics problems and solutions.
  • Verbal and written communication skills, problem-solving skills, and the ability to work independently.
  • Ability to engage reliably for 8+ hours/week.

**4\. More about the Opportunity**

  • About Cincinnatus LLC: Cincinnatus is an enterprise staffing company that partners with leading technology companies to source and employ highly skilled professionals for full-time and long-term contingent roles. Cincinnatus serves as the employer of record for these engagements, providing W-2 employment, payroll, benefits, and compliance, while placing employees directly within client teams to work on high-impact initiatives.
  • Applicants must be located in the United States with eligible work authorization.

Quoted from Mercor’s public listing on 2026-06-02. We don’t edit platform copy; honest framing is in the title and the “what this actually is” block above.