• Have you seen the OneSource

    truck lately? We are probably

    at a job site near you! 

  • Does your project need

    outdoor power? 

    Ask us about our new 

    charging stations!

  • Simple lighting quotes and layouts...

               ... in 30 minutes! 

    Available 6:30am - 5pm

    QuickQuotes@onesa.com

  • OneSource Joins Forces with Paolicelli & Associates in Western PA and WV
  • Please consider donating to the

    OneSource relief fund for the

    West Virginia flooding. 

    See details here!

Representing the Industry's Finest Manufacturers

Lighting, Supply, Control

For every project type.

One Source Associates, Inc. is a Manufacturers' Representative serving Maryland, Washington, D.C. and Northern Virginia. We represent the electrical and construction industry's finest manufacturers, and strive to lead the industry with passionate regard for service, ethics and customer satisfaction.

Services we provide include lighting and controls design, industry-leading order tracking, guaranteed bills of materials, energy audits, budget pricing, stock recommendations and usage reports, daylighting and shading assessments, and more. Our Friendly, Responsive and Knowledgeable staff will help you find, design, purchase and receive the quality products your project requires.