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Mark Thomas is proud to welcome Darin Johnson, PE. Darin recently joined our Southern California team as a Senior Associate and Transportation Division Manager.

Darin brings more than 30 years of experience delivering improvements to local roadways and Caltrans facilities. Working with President Rob Himes, Darin will leverage his strengths managing multidisciplinary projects to help us better serve our Southern California clients. He will also help manage and mentor our growing team of Southern California transportation engineers and technicians.

Darin can be reached at or 949-477-9000. Please join us in welcoming Darin to Mark Thomas!