Board Members

Picture Bio

Bill Chavez, P.E.


Project Manager
Sacramento Regional County Sanitation District
Phone: (916) 876-6015

Bill has been employed by the Sacramento Regional County Sanitation District and the County of Sacramento for over 20 years.  He has worked on the design and construction of interceptors ranging from 36 inches up to 10 feet in diameter, involving both trenchless technology and conventional open trench installation.  He has also been on the Project Management Team for the construction of two sewer pumping station, 10 and 40 MGD, in the City of Folsom and Citrus Heights.  He is a Professional Civil Engineer registered with the State of California.  Bill enjoys traveling, biking, photography, and tennis.


Jimmy Dang, P.E.

Vice Chair

Senior Civil Engineer
Oro Loma Sanitary District
Phone: (510) 481-6981

Jimmy has a B.S in Civil Engineering from Cal Poly San Luis Obispo and a MPA from CSU Dominguez Hills. He has worked as a designer since 2006 in infrastructure design, water and wastewater treatment plants, and construction management. Jimmy worked for a large General Contractor before coming to work in the design field. This is where he picked up a lot of valuable knowledge in the field that he has applied to his designs and construction management practices throughout the years. Outside of work, Jimmy enjoys traveling, seeing the sites, and visiting friends.


Bob Allen

Chief Financial Officer

Senior Project Manager
CDM Smith
Phone: (925) 933-2900


Amanda Schmidt, P.E.


Associate Engineer
Central Contra Costa Sanitary District
Phone: (925) 229-7363


Roberts McMullin, P.E.

At-Large Representative

Associate Engineer
East Bay Municipal Utility District (EBMUD)
Phone: (510) 287-1296

Roberts is a Associate Civil Engineer with EBMUD in Oakland.  He has over 12 years of experience in pipeline design, infrastructure asset management, and collection system master planning. He has a B.S. in Civil and Environmental Engineering from the University of Michigan – Ann Arbor and a M.S. in Environmental Engineering from the University of California – Berkeley. Robs has been involved with the PUG Board for over eight years.


Nancy McWilliams, P.E.

At-Large Representative

Engineering Manager
West Yost Associates
Phone: (530) 792-3222

Nancy McWilliams is co-leader of the Infrastructure Discipline Group and has 27 years of experience in the engineering field with a focus on planning, design, evaluation, inspection, and project management for water supply and wastewater collection systems.


Jill Sylvester, P.E.

At-Large Representative

Senior Engineer
Phone: (408) 392-7232

Jill Sylvester is a Senior Engineer at NV5 with over 12 years of experience in planning, design and construction of water, wastewater, and stormwater infrastructure. Jill has a B.S. in Civil Engineering from California Polytechnic State University, San Luis Obispo. Jill enjoys traveling, camping and visiting friends.