Our Firm

John W. Spiess, S.E.

John graduated from Purdue University in 1970 with a Bachelor of Science degree in Civil Engineering. He joined the firm in 1984, co-founded Ehlen & Spiess, Inc. in 1994, and is now the President of the corporation.
Professional Registration in California: Structural Engineer, Civil Engineer
Professional Affiliations:
  • Structural Engineers Association of Southern California Tri-Counties Chapter Director
  • California Office of Emergency Services Safety Assessment Program Volunteer
  • American Society of Civil Engineers Structural Engineering Institute

Jeffrey E. Haight, S.E.

Jeff graduated from Cal Poly, San Luis Obispo in 1988 with a Bachelor of Science degree in Architectural Engineering. He joined the firm in 1992, became a principal in 1999, and is the Vice-President of the corporation.
Professional Registration in California: Structural Engineer, Civil Engineer
Professional Affiliations:

Peter W. Ehlen, S.E.

Peter graduated from Stanford University in 1961 with Masters of Science and Bachelor of Science degrees in Civil Engineering. He founded Peter W. Ehlen and Associates in 1966 and is currently a project engineer.
Professional Registration in California: Structural Engineer, Civil Engineer
Professional Affiliations:
  • Structural Engineers Association of Southern California

Leslie N. Davis, S.E.

Les graduated from U.C. Berkeley in 1964 with Master of Science and Bachelor of Science degrees in Civil Engineering. He has extensive experience in structural analysis of multi-story, military, and historical structures, and joined the firm in 2004.
Professional Registration in California: Structural Engineer, Civil Engineer
Professional Affiliations:
  • Structural Engineers Association of Southern California
  • American Society of Civil Engineers

Andrew Wade, S.E.

Andy graduated from Chico State University in 1975 with a Bachelor of Science degree in Civil Engineering. He has extensive experience in rigging of all types of equipment and seismic evaluations of structures and manufacturing systems. He joined the firm in 2007. Professional Affiliations:
  • Structural Engineers Association of Southern California

Michael W. Turner, C.E.

Mike graduated from the Michigan Technological University with Master of Science and Bachelor of Science degrees in Civil Engineering in 1995. He joined the firm in 2001 and is a project engineer.
Professional Registration in California: Civil Engineer
Professional Affiliations:
  • Structural Engineers Association of Southern California
  • American Institute of Steel Construction
  • American Society of Civil Engineers

Aaron M. DeGough, C.E.

Aaron graduated from Cal Poly, San Luis Obispo in 2002 with a Bachelor of Science degree in Architectural Engineering. He joined the firm in 2004 and is a Project engineer.
Professional Registration in California: Civil Engineer
Professional Affiliations:
  • Structural Engineers Association of Southern California
  • American Institute of Steel Construction

Edward Cruz, C.E.

Edward graduated from Cal Poly, San Luis Obispo in 2008 with a Bachelor of Science degree in Architectural Engineering. He joined the firm in 2008 as a project designer.