Pleasanton Office

5142 Franklin Drive, Suite B
Pleasanton, CA 94588-3368
Phone: 925-225-0690
Fax: 925-225-0698

Pleasanton Building

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The Pleasanton office was established in 1962 and today serves as the company headquarters, directing public works and land development projects throughout the Greater Bay Area and the southern Central Valley.

Use the following links to review some of the many successful projects directed by MacKay & Somps’:

Land Use Projects
  • Master Planned Communities
  • Commercial Development
  • Industrial / Business Parks
  • High Density Residential
  • Redevelopment / Infill
Public Infrastructure
  • Roadways / Transportation
  • Water Resources
  • Flood Control
  • Schools / Public Facilities
  • Infrastructure Planning
  • CEQA Support
  • Parks Projects
Sustainable Projects
  • Water Quality / LID
  • Recycled Water System Infrastructure
  • Mitigation / Restoration Sites
  • Redevelopment / Urban Infill


Mark. D. McClellan, P.E.

Mark. D. McClellan, P.E.
Pleasanton Operations Manager

Click here to view photos of our Pleasanton office team.

Mark McClellan has been with MacKay & Somps for over 15 years. He graduated from Iowa State University in 1994 with a degree in Civil Engineering. After working in Michigan and Indiana for a civil engineering firm, he joined MacKay & Somps as a design engineer and quickly moved into project management. Mark has extensive experience in the land development entitlement process, subdivision design and mapping, and has entitled and managed single-family subdivisions, multi-family in-fill projects and mixed use developments as well as large scale master planned communities. Mark was appointed to Operations Manager of the Pleasanton office in April 2007.