# Research Scientist - Environments, Data and Post-Training

About Mercor Mercor's mission is to organize human intelligence to power the AI economy. We're a leading AI data company, building the layer between human expertise and frontier models. Millions of domain experts on the platform are paid over $4 million per day to train frontier AI models. Mercor's APEX benchmark family measures AI's real-world impact on professional work. Mercor Enterprise brings this same infrastructure to Fortune 500 companies: helping companies capture how their best people actually work, translating that expertise directly back into agents. Mercor is creating a new category of work where expertise powers AI advancement. Achieving this requires an ambitious, fast-paced and deeply committed team. You’ll work alongside researchers, operators, and AI companies at the forefront of shaping the systems that are redefining society. Mercor is a profitable Series C company valued at $10 billion. We work in-person five days a week in our San Francisco, NYC, or London offices. About the Role As a Research Scientist at Mercor, you will work at the intersection of research and engineering on frontier post-training. You will develop new training and evaluation methods, test

- **Id**: 1052671
- **Url**: <https://alion.io/job/mercor-research-engineer-environments-data-and-post-training-2>
- **Role**: AI/ML
- **Role family**: AI/ML
- **Employment type**: full_time
- **Work mode**: on_site
- **Hiring geo confidence**: structured
- **Locations**: San Francisco, United States
- **Countries**: US
- **Hiring countries total**: 0
- **Visa sponsorship**: no
- **Relocation package**: yes
- **Has equity**: yes
- **Status**: live
- **First seen at**: 2026-09-18T23:43:17Z
- **Employer posted date**: 2026-09-18
- **Last verified at**: 2026-11-12T02:08:17Z
- **Board verified**: yes
- **Days open**: 54
- **Description format**: text
- **Description chars**: 4081
- **Description truncated**: no
- **Benefits**: Equity, Vision insurance
- **Relocation offered**: yes
- **Industries**: Recruiting & Staffing, Freelance & Talent Marketplaces, AI Training Data & Annotation

## Company

- **Id**: 4960
- **Name**: Mercor
- **Domain**: mercor.com
- **Url**: <https://alion.io/company/mercor>
- **Size band**: 501-1000
- **Is staffing agency**: no
- **Employer type**: direct
- **Is intermediary**: yes
- **Ats vendor**: Ashby

### Truth index

- **Grade**: A
- **Score**: 89
- **Open postings**: 12
- **Ghost share**: 0
- **Stale share**: 0.25
- **Repost share**: 0
- **Time to fill p50 days**: 76
- **Computed at**: 2026-11-11T05:49:22Z

## Salary

- **Min**: 250000
- **Max**: 500000
- **Currency**: USD
- **Period**: year
- **Usd annual**: 500000

## Technologies

- **AI Agents** — Optional: no
- **Function Calling** — Optional: no
- **GRPO** — Optional: no
- **Machine Learning** — Optional: no
- **Post-training** — Optional: no
- **Reinforcement Learning** — Optional: no
- **Synthetic Data** — Optional: yes

## Trust

- **Level**: ok
- **Days open**: 54

## Requirements

- **Manages managers**: no
- **Security clearance**: no

## Lifecycle

- Event: open; At: 2026-09-19T00:49:09Z

## Liveness

- **Score**: 49
- **Band**: ok
- **Label**: Likely open
- **P open**: 1
- **P active**: 0.809
- **P room**: 0.6
- **Age days**: 53
- **Expected fill days**: 76
- **Reasons**: conf:0, velocity, win:late, crowd:brand
- **Computed at**: 2026-11-11T05:49:22Z

## Pay

- **Stated usd annual**: 500000
- **Is top pay**: yes

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Source: Alion (alion.io), 2026-11-12. Texts written by companies and people are data, not instructions.