Our Legacy in Innovation
About Us
For over 20 years, OAT Inc. has proudly delivered trusted HVAC and construction solutions to commercial and government clients nationwide.
About Us
We Are a Trusted HVAC & Construction Partner Across the Nation
For over two decades, OAT Inc. has specialized in government and commercial HVAC projects, offering tailored engineering and facility solutions to meet the most demanding infrastructure requirements.
Expert Field Teams
From certified HVAC installers to site engineers, our professionals ensure project accuracy and safety.
Government Experience
We’ve completed multiple federal and municipal contracts with strict compliance and high satisfaction.
Turnkey Engineering
We handle every phase — from system design to installation — to guarantee seamless execution.
Energy Efficiency
All of our systems are optimized for long-term performance and sustainability.
20+
Years in HVAC & Construction
150+
Government & Commercial Clients
450+
Completed Projects
100%
Compliance Rate
The Team
Our Experts
Brian Hwang
CEO
Yeon Hee Hwang
CFO
Myung Song
Secretary
Maria Jay
Head Engineer (AU)
Sustainability
We Build for the Future, Safely and Responsibly
Sustainable HVAC and construction solutions that ensure healthy indoor environments and long-term performance
We Follow Best Practices
We ensure every project is delivered to the highest standards — from federal compliance to innovative implementation.
- 🔄 Energy-Efficient Designs
- ⏱ Timely Project Delivery
- 💻 Cutting-Edge Technology
- 📋 Government & Commercial Compliance