HVAC Technician - AI Trainer (Remote)

Fully remote. Open to candidates anywhere in the United States. Independent contract, $50-$90/hour, fully async with no fixed hours.

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.

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 can't do in real professional work. Our contributors are practicing professionals, not annotators, and the work is credited, reviewed, and paid at professional rates.