About Us

Over 30 Years of Superior Quality and Customer Satisfaction

about us


When there’s no room for doubt, you need an expert. At National Network Services (NNS), we design, engineer, install and maintain a wide range of essential systems that include DC Power, industrial emergency generators and low voltage network cabling solutions. Our team of pros brings decades of engineering experience and is tapped into the pulse of the ever-changing industry. Specializing in the healthcare, education, commercial real estate, transportation and communications industries, we believe in being on time and on budget and demand the highest quality. When your network absolutely needs to work, there’s no better go-to.

Key Markets


When you focus on key markets, you get to know them inside and out. At NNS, our engineers and project managers have extensive knowledge of our customers’ business operations as well as code and regulatory requirements in their markets. Our experienced team understands that business interruptions can be not only costly, but also jeopardize compliance. We use our know-how to help you always stay one step ahead.


including hospitals, surgical centers, clinics, ER’s and medical buildings


multi building campuses and office buildings

Commercial Real Estate

property managers, multi tenant and high-rise office buildings

Data Centers

for telecom and commercial enterprise


including generator and DC power maintenance


Our team

Our project management teams and field technicians average over 18 years of experience in the industry. We deliver well-engineered, high-quality solutions on time and on budget. And our performance is unmatched in the markets we serve. Our Management team and field leads averages over 20 years of industry experience. We deliver well-engineered, high-quality solutions on time and on budget. Our performance is unmatched in the markets we serve. Our team of professionals are highly experienced in Structured Cabling, Security, Audio Visual, DAS and DC Power plants.

Jeff Bowlus


Jeff has nearly 30 years of industry experience. Jeff joined NNS in 2014. Jeff joined NNS with a background in electrical and low voltage project management and design. Prior to his years in contracting, Jeff worked as a project manager for a large software company.

Larry Griess


For Larry has over 20 years of industry experience. Larry joined NNS in 2002. Larry has completed many different types of projects over the years including several Greenfield Hospital construction projects and several new Fiber Optic Installations at the South Pole.

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Our Locations

We are a single-source systems integration firm located in Aurora, Colorado.