Our Organization

Johannes J. Hoevertsz, P.E., Director

Johannes is the Director of Sonoma Public Infrastructure, managing essential services including road and bridge construction and maintenance, airport operations, integrated waste management, transit services, a few water districts, county facilities, capital projects, fleet management, and real estate. Currently, SPI employs about 270 people, and operates with an annual budget of about $247 million.

Johannes joined SPI in November of 2015 as the Deputy Director, overseeing airport operations, integrated waste management, and information systems. Prior to joining SPI, 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. 

Monique Chapman, Deputy Director, Administration

Monique has executive leadership of SPI’s customer service, continuity of operations, human resources, information technology, infrastructure grant services, and the County-wide centralized purchasing function.  Monique started with the County in 1997 and has been a fiscal manager since 2011. After working in Child Support Services, Probation, Sheriff’s Office, she found her home with us at SPI, managing our administration division since September 2017, seeing the department through multiple fire and flood disasters, as well as COVID. This included management of department fiscal, accounting, H/R, grant, customer service, and records management activities. More recently, she has led consolidation efforts starting in February 2022, including extensive organizational analysis and merging of all department administrative functions.

Michelle Ling, Deputy Director, Facilities Development & Management

Content will be posted here soon.

Trish Pisenti, Deputy Director, Transportation, Operations and Fleet

Trish is the Deputy Director of Transportation, Operations and Fleet, and oversees Integrated Waste management, disaster funding and projects, transit systems, water systems and the lighting districts. Trish began working with the County in 2007 as the Integrated Waste Division Manager, and became the Deputy Director in 2018.

Trish has over 30 years’ experience working in the private sector of the solid waste industry. She serves as a Public Sector Director on the Solid Waste Association of North America - Northern California Chapter. Trish has a Bachelor’s degree in Business Management/Accounting from Sonoma State University.

Janice Thompson, Deputy Director, Engineering & Maintenance

Janice is the Deputy Director of Engineering and Maintenance, and oversees Road and Bridge Design, Construction, Traffic and Maintenance. Janice has a long history with the County, beginning in 1992 as a Civil Engineer for the Roads Division. She became Deputy Director in 2018.

Janice has over 30 years’ experience, 25 years working as an engineer with SPI. Prior to coming to SPI, Janice worked as a consulting engineer in subdivision design for the private industry for 5 years. Janice is a registered Civil Engineer and a graduate of UC Davis. Janice is a Sonoma County native, born and raised in Petaluma.