Susan Klassen, P.E. Director
Susan Klassen has been the Director of the Sonoma County Department of Transportation and Public Works (TPW) since March 2013. As the Director of TPW, Susan manages essential services including road and bridge construction and maintenance, airport operations, transit services, integrated waste management, and a few water districts.
Susan has worked for Sonoma County since 1985, serving in a variety of increasingly responsible roles within many divisions of TPW. Susan is a registered Civil Engineer and a graduate of California State University, Chico. She is also active in the County Engineers Association of California, currently serving as the Chair of the Transportation Policy Committee, and formerly serving as the Chairman of the Solid Waste Policy Committee.
Johannes J. Hoevertsz, P.E. Deputy Director
Johannes is a Deputy Director of TPW, managing essential airport operations, transit services, integrated waste management, and information systems. Johannes began working with TPW as a Deputy Director in November 2015.
Prior to joining TPW, Johannes was the Road Commissioner and Public Works Director in Madera County, and Division Manager of Fresno County Public Works Division of Maintenance and Operations, for 21 years combined. Johannes is a registered Civil Engineer and a graduate of California State University, Fresno. Johannes is active in the County Engineers Association of California.