UC Berkeley - 2026 Spring STEM Career Fair

With 50+ years of experience and over 500 employees, Preston Companies has continued to evolve, while always delivering on our core values of Quality, Integrity and Service. 

• Preston Companies is the parent company for all current and future business ventures.
• Preston Pipelines Infrastructure (PPI) provides all underground utility services previously performed by Preston Pipelines, Inc.
• Preston Electric provides extensive dry utility work, including underground electrical and data, traffic signalization, transformers and switchgears.
• Dirt Market provides project-site soil management services, budgeting, sampling, analysis and removal.

Thank you for attending the UC Berkeley 2026 Spring STEM Career Fair and choosing us! 

If you're interested in an internship opportunity, please apply through our website!