Student Experience: Dan Walter

“I'd already earned a bachelor’s degree in mechanical engineering from LeTourneau University, but after about three years sitting behind a desk designing construction equipment, I knew I wanted to run my own business. Energy efficiency is something I’ve always been interested in, so it made sense when I was looking for a business idea. 

“Although we offer several products and services that reduce energy usage, air conditioning is a big part of our business. I took all of the air conditioning courses because I wanted to further my knowledge in the field. The best part of my experience was interacting with the faculty; they were just so knowledgeable. David Eishen (now retired) was the biggest reason I joined the program; he really got me involved in the Green Building Institute. 

“I would recommend this program because it gives you a good background in air conditioning. Probably 70% of technicians out there don’t have a good idea of how air conditioning works. They’re taught what to do to make systems work, but they don’t have real understanding of what they’re doing. 

“If you want to start your own business, do what you’re passionate about, and you’ll probably be successful.”   

Dan Walter earned a Residential - Technician III certificate. He is certified by the International Code Council (ICC) to perform both plan reviews and inspections on residential buildings.

His company, Duncanville-based Energy Efficient Solutions, offers services that include energy audits and duct testing in addition to International Energy Conservation Code (IECC) compliance. He has also taught courses as an adjunct instructor at the Residential Building Performance Technology program.


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Leonardo Figueroa

Leonardo Figueroa

Pipefitter Refrigeration Design Technology
“The program was excellent, and I learned a lot. For instance, I had absolutely no knowledge of electrical systems, and now I feel pretty comfortable with them. My instructors really pushed me. It’s a program I’ve already recommended to several people.”
Air Conditioning and Refrigeration Technology
Vassil Doudov

Vassil Doudov

Coordinator, Client Relationship Management at Dallas College
“I recently completed the USI Dallas College Drone Workshop and gained valuable hands-on experience in just a few days. Mr. Hill’s expertise and passion made the training especially impactful.”
Drone Technology
Theresa Tennyson-Young

Theresa Tennyson-Young

Senior Inventory Analyst Cummins Southern Plains, LLC
“My Logistics classes have given me new ideas on ways to handle things at work. And the convenience of the online courses lets me fit school around my work schedule, which isn’t always easy, but definitely worth the effort.”
Logistics and Supply Chain Management
Paul Maniscalco

Paul Maniscalco

Career Changer
“What attracted me to welding is its stability; you can pursue it as a lifelong career. My advice is to think really long term about your career future. Stick with it, because once you have welding skills, a lot of possibilities open up.”
Welding
Dan Walter
Dan Walter
Owner Energy Efficient Solutions

Air Conditioning and Refrigeration Technology
School of Manufacturing and Industrial Technology
Updated September 10, 2026