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OpenTrainPhDMaster's

Materials Science Expert (AI Safety)

You will help evaluate whether AI systems handle safety-critical materials science questions appropriately. The work combines prompt writing, expert review, clear reasoning, and revisions based on structured feedback.

Field
Chemistry
Where
United States, Australia, Canada, New Zealand, United Kingdom
Asks for
PhD, Master's
Posted
3 days ago

Pay data for your profession: Science AI trainer jobs · PhD AI trainer jobs · Chemistry AI trainer jobs

How this pay compares

At $150/hr, this role pays more than 95% of the 51 open chemistry roles with a listed pay range, above the median of $83.

Open chemistry roles that ask for a PhD have a median of $79/hr (32 roles).

Among platforms with 10 or more priced chemistry roles, Mercor has the highest median ($85/hr across 11 roles) and OpenTrain AI the lowest ($75/hr across 25).

OpenTrain AI roles that closed since late October stayed listed a median of 31 days (122 roles). OpenTrain AI posted this one 3 days ago.

Computed from 2,746 open roles we track across Mercor, micro1, Handshake AI, Alignerr, Appen and OpenTrain AI, refreshed daily. Midpoints of listed ranges; “up to” ceilings are left out of medians.

What you would earn at this rate

Rate

$150/hr

Per week, before tax

$2,250

Per month, if the work is steady

$9,750

Tax
Contract pay arrives with no tax withheld. A US contractor at this rate and these hours would set aside about $2,465 a month for self-employment tax plus federal income tax at the 12% bracket (25%, before state tax). Outside the US, your own country's rules apply.

Assumes paid hours only; unpaid assessments, onboarding and gaps between projects lower the real figure. Full take-home calculator · Track what you actually earn

Open chemistry roles on each platform

The same kind of work, priced on every platform we track, with the best-paid open role on each.

PlatformOpenMedianBest-paid open role
Mercor11$85/hrChemistry Domain Expert$90-140/hr
Alignerr13$83/hrChemist, PhD$90-120/hr
OpenTrain AIthis role25$75/hrComputational Materials Science Expert$175/hr
Handshake AI6up to $58/hrChemistry ExpertUp to $150/hr

“Up to” rows list only ceilings, so their median is a maximum, not comparable with the range midpoints above them.

All 57 open chemistry roles →

The full listing

As posted on OpenTrain AI. See the original

The work

You will help evaluate whether AI systems handle safety-critical materials science questions appropriately. The work combines prompt writing, expert review, clear reasoning, and revisions based on structured feedback.

  • Write prompts and scenarios that test the boundary between safe and unsafe materials science requests.
  • Review and classify prompts created by other experts.
  • Explain why a prompt is acceptable or where it crosses a safety boundary.
  • Revise your analyses in response to structured reviewer feedback.

What it pays and takes

  • Pay: $150 per hour, with $85 paid for each approved task.
  • Work type: Remote, flexible, task-based contractor work.
  • Location: Open to candidates physically located in Australia, Canada, New Zealand, the United Kingdom, or the United States while performing the work.
  • Language: Fluent English.
  • Education: A master's degree or higher in materials science, materials engineering, metallurgy, or a closely related field.
  • Core skill: Explain the technical reasoning behind safety judgments clearly and precisely.
  • Helpful background: Experience with AI evaluation, red teaming, or data annotation.
  • Additional helpful experience: A PhD or professional work in metallurgy, advanced or energetic materials, nuclear materials, or national laboratory research.

How it works

Apply on OpenTrain with your resume, then complete the application on the hiring site.

About AI training work

AI training is the human work behind systems that learn from examples, including writing prompts and judging model responses. People with specialized knowledge are needed when an AI system must handle technical or safety-sensitive questions accurately.

From applying to your first payment on OpenTrain AI

  1. 1

    Create a profile

    Create a free OpenTrain profile with your domains, languages and hourly rate.

  2. 2

    Apply

    Apply to the listing. Some listings hire through OpenTrain; others send you to the hiring platform.

  3. 3

    Funded milestones

    The client funds each milestone before work starts.

  4. 4

    First payment

    OpenTrain pays out to your connected payout method when the client approves the milestone. It doesn't publish a fixed payout schedule.

Sources: OpenTrain: AI training careers, OpenTrain docs: invoicing and payouts

Full OpenTrain AI profile: watch-outs and the public record →

Pay history

OpenTrain AI has listed this role at $150/hr since Nov 10, 2026 with no change.

Across OpenTrain AI's chemistry roles, the median listed pay was $70/hr on Nov 1, 2026 (13 roles) and is $75/hr as of Nov 11, 2026 (25 roles).

What workers report about OpenTrain AI

Anonymous reports from people who applied or worked there: whether they got work, what they were paid and how fast.

Other chemistry roles

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