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Our Organization

Johannes J. Hoevertsz, P.E. Director

Johannes is the Director of TPW, managing essential services including road and bridge construction and maintenance, airport operations, transit services, integrated waste management, and a few water districts. Currently, TPW employs about 165 people, and operates with an annual budget of about $130 million.

Johannes joined TPW in November of 2015 as the Deputy Director, overseeing airport operations, transit services, integrated waste management, and information systems. 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. 

Olesya Tribukait, P.E. Deputy Director

Olesya is a Deputy Director of TPW, overseeing the Engineering and Maintenance functions, including bridge and road engineering, traffic engineering, construction, right of way and roadway maintenance including bridges, culverts and traffic. Olesya began working with TPW as a Division Manager in July 2015, and became Deputy Director in September of 2017.

Prior to coming to Sonoma County, Olesya worked in Yolo County for 10 years as a Senior Civil Engineer. Olesya is a registered Civil Engineer, and has a Masters in Civic Engineering from the California State University of Sacramento.

Trish Pisenti, Deputy Director

Trish is a Deputy Director of TPW, and oversees Integrated Waste management, disaster funding and projects, water systems and the lighting districts. Trish began working with the County in 2007 as the Integrated Waste Division Manager, and became an Interim 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.

Contact Information

Transportation & Public Works
Business Hours
Monday – Friday
8:00 AM – 5:00 PM
Contact us by Phone
Office Location
La Plaza B
2300 County Center Drive
Suite B 100
Santa Rosa, CA 95403
38.462006, -122.725384