| 2018 |
Mary Jo Ramey |
Central Marin Sanitation Agency |
| 2017 |
Roni Gehlki |
Ironhouse Sanitary District |
| 2017 |
Jennifer Peet |
City of Modesto |
| 2016 |
Angela Lowrey |
Delta Diablo |
| 2015 |
Susan Hiestand |
Silicon Valley Clean Water |
| 2014 |
Gretchen Mueller |
Central Marin Sanitation Agency |
| 2013 |
Robert Cole |
Central Marin Sanitation Agency |
| 2012 |
Jackie Davison |
City of Sunnyvale |
| 2011 |
Catherine Allin |
City of Milbrae |
| 2010 |
Teresa Kistner |
Goleta Sanitary District |
| 2009 |
Michael Simpson |
City of Los Angeles |
| 2008 |
Jennifer Kaiser |
Vallejo Sanitation Flood Control District |