Join the Team That Keeps Ohio Running Cool
We don’t just build ammonia refrigeration systems. We build careers. From food processing plants to pharmaceutical warehouses, our work keeps essential industries operating safely and efficiently. If you thrive in technical environments, value independence on the job, and want to grow with a trusted local company, we want to meet you.
Why Work With MRNH3?
Work That Matters
Our clients depend on us to keep their operations running 24/7. You’ll play a key role in systems that power food distribution, healthcare, and manufacturing across Ohio.
Room to Grow
We believe in upskilling and promoting from within. Whether you’re starting as an apprentice or stepping into a project manager role, you’ll find a clear path forward.
Specialized Field and Long-Term Security
Ammonia refrigeration isn’t general HVAC. It’s a specialized, high-demand trade that offers long-term career stability. We train for safety, precision, and long-term success.
Supportive, Tight-Knit Team
You’re not a number here. Our leadership is accessible, our technicians support one another, and we share the goal of delivering service that doesn’t cut corners.
We’re Hiring For:
Ammonia Refrigeration Technicians
Maintain and repair systems across Ohio. This requires mechanical aptitude and EPA certification (or willingness to obtain).
Installation Crew Members
Help build and install high-performance ammonia refrigeration systems. Must be able to read blueprints, operate tools, and follow job site protocols.
Service Dispatcher
Coordinate emergency repair requests, manage technician schedules, and communicate with clients.
Project Manager
Oversee system installations and major repairs, manage timelines and budgets, and serve as a key point of client communication.
Don’t see your role listed? We’re always on the lookout for great talent. Send us your resume anyway, we might be hiring soon.
What We Offer
Competitive pay
Health benefits
Paid holidays and time off
Ongoing training and certifications
Clear advancement opportunities
A team you can count on
Who Thrives Here
Problem-solvers who can think on their feet
Reliable team members who take pride in quality work
Safety-focused professionals who value precision
Independent workers who don’t need to be micromanaged
Technicians who want to grow in a specialized field
Ready to Apply?
Fill out our short application below. Include the position you’re applying for and your certifications, if applicable. We’ll be in touch if it’s a good fit.
Have Questions?
Call us at (614) 745-4500 and ask to speak with our hiring team.