Port Arthur sits on the lower west bank of Sabine Lake in southeast Jefferson County, about 17 miles southeast of Beaumont, and the U.S. Census Bureau counts nearly as much water as land inside its city limits.
Refining arrived within a few years of the city's founding in 1895, and Port Arthur now hosts three operating refineries: Motiva's, the largest in the United States by crude distillation capacity in the U.S. Energy Information Administration's January 2026 survey, plus refineries owned by Valero and TotalEnergies.
Contractors, maintenance crews, engineering firms, and suppliers work around those plants, alongside the medical offices, retailers, and service businesses that serve the city.
Cyber One Solutions provides those businesses with managed IT and managed cybersecurity under one monthly agreement.

