Paul Westermann, PE, SE

Paul Westermann’s 38 years of engineering experience trace back to Penn State, where he earned his architectural engineering degree from in 1979. From there Paul headed west, amassing a diverse engineering portfolio including hotels, hospitals, schools, commercial and industrial buildings, casinos, telecommunication facilities, and airline facilities. In the last two decades Paul has developed an expertise in structural engineering services for solar photovoltaic array projects and has worked on some of the largest in the world. He oversees the structural design of roof-mounted and ground-mounted PV arrays from conception to completion of construction, and under Paul’s leadership, Interactive Resources has become a leading firm in solar array design.

Paul is licensed in two dozen states as well as Puerto Rico. He manages our Central Valley/Sierra Foothills office and lives in the historic Gold Rush town of Angel’s Camp, California, with his wife Lisa, and son Paul Jr.

Paul Westermann, PE, SE


  • Bachelor of Architectural Engineering, Pennsylvania State University, 1979

Professional Licenses and Certifications

  • Registered Professional Engineer: California, Alabama, Colorado, Connecticut, Florida, Georgia, Hawaii, Indiana, Maryland, Massachusetts, Minnesota, New Jersey, New Mexico, New York, North Carolina, Ohio, Oregon, Pennsylvania, Rhode Island, Texas & Puerto Rico
  • Registered Structural Engineer: California, Arizona, the District of Columbia, Massachusetts, Nevada, Rhode Island, Utah, Vermont & Washington

Professional Associations

  • Structural Engineers Association of California (SEAOC)
  • American Society of Civil Engineers (ASCE)
  • Architectural Engineering Institute (AEI)
  • Structural Engineering Institute (SEI)
  • Structural Engineers Association of Northern California (SEAONC)
  • American Concrete Institute (ACI)
  • American Society of Civil Engineers (ASCE)
  • National Council of Examiners for Engineering & Surveying (NCEES)
  • Puerto Rico Association of Engineers & Surveyors of Puerto Rico