Our national team designs thousands of building systems each year. We are well-versed in all climate zones and code requirements to determine the best solutions and provide your business with the right mechanical system. While our manpower allows for quick design turnarounds, our engineers are hands-on and practical, carrying an advanced understanding of all the components involved in your building.

1 Haas Hall 1

Making history for a high school.


For years, developers attempting to renovate the historic Lane Hotel were stymied by the challenge and expense of installing a fire-suppression system. We cracked the code and helped transform the Lane into what might be the nation’s most beautiful charter high school: Haas Hall Academy. READ MORE


See MORE Mechanical Engineering Projects


When space constraints, physics, and building design combine to create a seemingly unsolvable problem, that’s when our engineers get excited.



Director of Mechanical Engineering

David brings nearly 20 years of experience to overseeing all aspects of mechanical and plumbing design for single-site projects and large national programs alike. READ MORE


479.877.3465  mail

croppedRogers Office Leiffer and Perrien
Arkansas group photo

Core states - one of the giants

We made Electrical Construction & Maintenance (EC&M) Magazine’s Top 40 Electrical Design Firms list for the second consecutive year in 2020 and a third appearance on Consulting-Specifying Engineer’s “MEP Giants” list. These lists honor the top revenue-generating engineering firms in the nation.


Since launching our MEP group a decade ago, our engineers have designed over 2,000 building systems nationwide. Having engineers spread out across the U.S. allows our team to not only tackle programs quickly, but to really dive into local zoning and code requirements. We like to think it’s our depth of knowledge and eagerness to exceed expectations that has our clients coming to us when they roll out new initiatives including new builds, system upgrades, or LEED certification. 


With a focus on climate change and demand for clean energy, Core States assembled a team of engineers dedicated to the energy market. Our engineers have designed over 76.876MW in battery storage across 150 sites, over 85MW in solar power across 200 sites, over 173.375MW of fuel cell power across 426 sites, 27.84MW in CHP/natural gas generators, and electric vehicle charging stations, meeting sustainability goals and lowering utility costs for private corporations nationwide.


How can our engineers help you?


See our job listings and learn more about our company culture.