Specializing in traffic equipment and contract manufacturing, SWARCO McCain, Inc. has employed over 500 employees between its headquarters, regional offices, and two manufacturing facilities–the newest LEED-certified manufacturing facility in Vista, California and Tijuana, Baja California, Mexico.

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The company was founded in 1987 by Jeffrey L. McCain as McCain Traffic Supply, a small manufacturer of traffic signals. In 1991, McCain Traffic Supply began manufacturing its own line of traffic controllers and cabinets. That same year, McCain expanded its sales and technical support efforts by opening a branch office and small manufacturing

facility in Preston, Washington.

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To keep up with demand, in 1995 McCain expanded operations into Tijuana, Baja California, Mexico by opening a 140,000 sq. ft. manufacturing facility.[2] By the late 1990s, McCain was manufacturing a full line of traffic equipment products that included traffic signals, signs, cabinets, and controllers.

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At the turn of the century, McCain's portfolio expanded through the addition of software that would grow to include traffic signal control software, central traffic management systems, adaptive signal control, and other controller software programs.

To better represent the gamut of products and services available,

McCain Traffic Supply changed its name to McCain, Inc. in 2005.​​

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