Portrait of Peter MacLaggan


Peter MacLaggan

'79, B.S. Civil Engineering, San Diego State University, San Diego, CA; Juris Doctorate, University of San Diego, San Diego, CA

Senior Vice President, Project Development (Retired)

Poseidon Water


Mr. Maclaggan spent over 40 years in water resources engineering prior to retiring in 2021.  Mr. Maclaggan was a Senior Vice President of Project Development for Poseidon Water for twenty years prior to his retirement.  There he was responsible for development of the Carlsbad desalination plant, a $1 billion public-private partnership with the San Diego County Water Authority that provides ten percent of the potable water consumed in San Diego County.
Prior to joining Poseidon Water, Mr. Maclaggan worked in water resources engineering, planning, and development in both the public and private sector, including twelve years with the San Diego County Water Authority where he served as Director of Water Resources. 

SDSU Affiliations:

  • College of Engineering – Advisory Board