HVAC Expert

AfterQuery; Ireland; Remote; EUR 61,000 - 111,000; Part time

Job summary

AfterQuery is seeking licensed HVAC technicians to work as contractors, authoring and evaluating diagnosis and system design scenarios used by frontier AI labs. This remote, async role is home-based and pays weekly via Stripe.

You’ll craft realistic service-call scenarios, provide reference answers with detailed reasoning, and assess model outputs for accuracy, efficiency, and safety. The position requires EPA 608 certification, a state HVAC license where required, 2+ years of field experience,

Qualifications

• EPA Section 608 certification plus any required state license.
• 2+ years of field experience in installation, service, or controls.
• Working knowledge of refrigeration cycles, airflow, and load calculations.
• Clear written English for documenting diagnostic reasoning.
• Able to commit at least 10 hours per week.

Responsibilities

• Author realistic HVAC scenarios from symptom through diagnosis and repair.
• Write reference answers with system and code reasoning behind each step.
• Grade model output for technical accuracy, efficiency, and safety.
• Flag advice that would harm equipment or endanger occupants.

Skills

EPA 608 certification

state HVAC license

2+ years field experience

clear written English

commit at least 10 hours per week

Job description

Licensed HVAC technicians to build the diagnosis and system design scenarios frontier AI labs use to test model judgment on real trade work. AfterQuery builds the expert evaluation data that frontier AI labs use to measure and improve their models. We're hiring HVAC technicians as contractors to author and grade the diagnosis and system design scenarios those evaluations run on. This is knowledge work built on your trade, done entirely from home.

What you'll actually do

Author realistic HVAC scenarios from symptom through diagnosis and repair, the kind you actually run on a service call. Write reference answers with the system and code reasoning behind each step, why that charge, why that duct size, why that sequence of operations. Grade model output for technical accuracy, efficiency, and safety. Flag advice that reads plausible but would kill a compressor or vent CO into a home, the misses only a working tech would catch.

Who this is for

HVAC technicians with EPA 608 certification, any required state license, and at least two years of field work. Residential service, commercial refrigeration, and controls techs, all specialties welcome. Tradespeople who can explain the why behind the fix, not just the fix. People comfortable writing clearly, this work is typed, not brazed.

Contract and pay

$50 to $90/hr, paid weekly via Stripe. Your rate is set from your experience, not negotiated down after you start. Remote and async. No fixed hours, it fits around jobs. Minimum 10 hours per week, no maximum. Scale up or down week to week. No screen recording, no keystroke monitoring, no idle timers. Independent contractor. Ongoing project work rather than single task batches.

About AfterQuery

AfterQuery is an expert data lab. We build the evaluation and training data that frontier AI labs use to measure what their models can and cannot do in real professional work. Our contributors are practicing professionals, not annotators, and the work is credited, reviewed, and paid at professional rates.

Responsibilities

• Author realistic HVAC scenarios from symptom through diagnosis and repair
• Write reference answers with the system and code reasoning behind each step
• Grade model output for technical accuracy, efficiency, and safety
• Flag advice that reads plausible but would kill a compressor or vent CO into a home

Required Qualifications

• EPA Section 608 certification, plus a state HVAC license where your state requires one
• 2+ years of field experience in installation, service, or controls
• Working command of refrigeration cycles, airflow, and load calculation
• Clear written English for documenting diagnostic reasoning
• Able to commit at least 10 hours per week

Preferred Qualifications

• NATE certification or HVAC contractor license
• Commercial refrigeration or building automation depth
• Heat pump, geothermal, or high efficiency system experience

Why apply

• Paid for your trade knowledge, no tools, no travel, no job site
• Set your own hours and scale up or down week to week, it fits around jobs
• Weekly pay via Stripe at a rate set from your experience
• Your judgment shapes how the next generation of AI handles the trades