Meet the Team behind ColdTech Systems.
CJ Sawyer
Founder & Field Systems Author — ColdTech Systems
CJ is a systems-first field technician and resilience operator who has spent decades making infrastructure work in places most people only read about.
His career path spans rugged and unforgiving environments — from serving in the military to leading drilling operations in exploration and oil fields, to managing and maintaining a 100-site RV park at 7,000 feet in the Southern Colorado Rockies. In that high-altitude, high-winter playground, every system — water, power, sewer, heat — carries consequences when it fails.
That experience taught him two things:
Failures are never random, and most of them are preventable with the right systems and methods.
Before ColdTech Systems, CJ founded TundrCore Resilience Group, a consultancy dedicated to hardening critical infrastructure in remote, extreme environments. Whether it’s freeze-proofing water distribution, designing redundancy into off-grid power, or troubleshooting a frozen hydrant at midnight, his work is rooted in real conditions, real risks, and real outcomes.
ColdTech Systems exists to document what actually works when winter stops being a season and becomes a test. Every guide and checklist here is drawn from field experience — not speculation, trend content, or theory — with the goal of helping others live and work where cold is a constant variable.
If it’s written here, it’s because it’s been proven in the field.
Certifications & Training
- Military systems operations
- Field maintenance leadership
- Off-grid infrastructure readiness
- OSHA 30
- FEMA Certified
Where CJ Works
- High alpine
- Sub-zero environments
- Remote utilities
- Off-grid habitats
Why ColdTech Exists
ColdTech Systems is dedicated to documenting what survives winter so you don’t have to learn the hard way.
Tre Sherrod
Tre is a systems-minded field technician and resilience operator with many years of experience keeping critical infrastructure working in challenging environments.
His career has taken him through rugged, high-consequence environments, from first-response environmental recovery work in extreme weather, to maintaining infrastructure across manufacturing facilities and complex maintenance operations.
Across those years, Tre has developed a practiced eye for spotting failure patterns and potential catastrophes before they surface.
He has led maintenance teams in unforgiving landscapes, stabilized systems others had written off, and built a reputation for solving problems where conditions are harsh, margins are thin, and the cost of guessing wrong is measured in real-world consequences.
Where Tre Works
- High alpine
- Sub-zero environments
- Remote utilities
- Off-grid habitats
ColdTech Systems 