• Electrical Contracting

    OneCore Electric is a full service Electrical Contractor. Serving commercial, multi-family, and residential properties.
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  • Fire Alarms

    We design, install, and inspect commercial fire alarm systems. With over 30 years experience in this area you can trust us with these critical systems
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  • Door Code Access Systems

    OneCore Electric has the expertise to design, install, and inspect your building's door code system. Protect your property while allowing your tenants easy and secure access.
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OneCore Electric has the team and expertise you need

Get in touch with us today for a competitive quote and detailed explanation of our services

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Our Recent Work

View some of our recent commercial and residential projects.

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About OneCore

Family Owned

Serving Colorado with great pride

OneCore Electric is a continuation of a family owned business that started in 1963. Mr. Les Williams guides and controls the day to day operations of OneCore Electric, Inc. & Mr. Williams Sr. over see’s the Administrative and Training aspects for the Corporation. They are Licensed Electricians and Contractors that carry on the tradition that was started in 1963 by earlier family members. With some employees owning stock in the company due to their longevity in the firm and loyalties to taking care of the business and customer needs. Together they have built a quality company providing a variety of electrical services for their customers. From Design & Budget to Problem Solving & Alternative installation methods. We get the job done right.

OneCore Electric provides their services to some very exceptional quality builders and projects. We take pride in all our work.


  • Who Is OneCore Electric? +

    OneCore Electric provides state of the art wiring installations in various areas of the construction industry. For most Contractors we Read More
  • What Can I Expect? +

    You can expect a reasonable estimate. A company that will show up and do their job with skilled capability and Read More
  • Why OneCore? +

    Over the last 35 years we’ve watched the struggles General Contractors went through in scheduling various sub-contractors that deal with Read More
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