About Us
The Sonoma County Public Infrastructure Department leads the way to a safe and sustainable community by planning, building, managing, and maintaining Sonoma County's investment in quality services and infrastructure. Join our Team of nearly 300 staff who work across eight divisions supporting the County’s critical transportation infrastructure, procurement and maintenance of equipment, vehicles, and real estate, airport management, public transit services, various capital projects, oversight of four water systems, and maintenance of several waste disposal sites.
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Coming Together: A Film Short on the Merger of TPW and General Services |
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Our Executive Leadership Team
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Johannes J. HoevertszDirector, Public Infrastructure Johannes leads essential public services in Sonoma County, including roads, transit, waste, airport operations, and facility management. With over 25 years in public works, he joined SPI in 2015 after leadership roles in Madera and Fresno counties. He is a licensed Civil Engineer and graduate of CSU Fresno. |
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Monique ChapmanDeputy Director, Administration Monique heads SPI’s administrative services, including HR, IT, grants, purchasing, and customer service. A County employee since 1997, she joined SPI in 2017 and has guided the department through multiple emergencies while driving operational improvements and administrative consolidation. |
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Michelle LingDeputy Director, Facilities Development & Management Michelle oversees capital projects, facilities operations, and real estate. She joined the County in 2019, bringing 20+ years of global experience in strategy, crisis response, and communications. A UC Berkeley graduate, Michelle has led major initiatives like Los Guilicos Village and the new County Government Center. |
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Trish PisentiDeputy Director, Transportation, Operations & Fleet Trish directs transportation, fleet, waste management, disaster recovery, transit, water systems, and lighting districts. She joined the County in 2007 and became Deputy Director in 2018. Trish has 30+ years in the solid waste industry and holds a Business/Accounting degree from Sonoma State. |
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Funding Sources
The Sonoma County Department of Public Infrastructure relies on a variety of funding sources to plan, build, and maintain critical public infrastructure. These sources include local Measure M transportation sales tax revenues, state gas tax, state and federal grants, road and bridge funds, and general funds.
Underground Utilities Projects
The Public Infrastructure department in Sonoma County is collaborating with PG&E to advance underground utilities through PG&E’s 10,000-mile wildfire safety undergrounding program and the CPUC’s Rule 20A tariff-based initiative for designated districts.
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