Gary W. Darling

Gary W. Darling has been General Manager at Delta Diablo Sanitation District (DDSD) since 2003. He has a long and varied career in water management and environmental stewardship with developing new sustainable water and energy resources for the San Francisco Bay Area. This includes serving as the program manager on the $450 million Los Vaqueros Reservoir project, which was completed on budget and won the 1999 American Society of Civil Engineers Outstanding Achievement Award, as well as the program manager for the $650 million Freeport water project during the environmental review phase.

While at DDSD, the agency has taken the lead role in several Bay Area coalitions including the 14 agency Bay Area Recycle Water Coalition, the 16 agency Bay Area Biosolids to Energy Coalition, as well as the 11 agency East County Water Management Association. As part of DDSD’s waste-water treatment facility, Gary oversees one of the largest industrial recycled water plants in California. He is often invited to speak at industry conferences, such as General Electric’s Leadership Summit: From Used to Useful held in New York where more than 100 international and U.S. delegates addressed global recycle water initiatives, challenges, and opportunities. A graduate of the University of California, Davis, Gary is a registered professional civil engineer. He and his wife, Cindy, reside in Walnut Creek with their two children.




Tim Wallis

Tim Wallis is the Chair of Doyon Utilities, LLC. Tim retired from the Senior Vice President position in May 2012, a position he held since 2007. Prior to Doyon Utilities, Tim served as the General Manager of Doyon Properties Inc. from 2003 until 2007 where he was responsible for management and maintenance of the Doyon Industrial Facilities which has Alyeska Pipeline as a tenant. Tim was responsible for oversight of all construction activities, future contracts, project selection for bidding, review of labor requirements, estimates, negotiations, review progress and job cost reports.

Additional responsibilities included budget preparation and presentation with a five year forecast, staffing and management requirements of Doyon Properties. As the General Manager of an SBA certified 8(a) company, Mr. Wallis was responsible for submission of the financial reports and submission of an annual report to the SBA. Under the construction responsibilities of his position he was the Project Manager for the Battle Area Complex and Collective Arms Training Facility, Donnelly Training Area and other military projects on Forts Greely, Wainwright and Richardson.  

Tim has also served in the Alaska House of Representatives and as Chairman, President and CEO of Doyon, Limited.






John C. Sheptor

John C. Sheptor served as the President and CEO of Imperial Sugar Company from February 2007 to September 2012. During this time he dealt with devastating disaster and brought the company through to a very successful performance issues. Negotiated a merger of Imperial sugar that was beneficial to the shareholders and the employees of the company. Core business in sugar refining and marketing in the NAFTA region. $1 billion revenue and traded on the NASDAQ stock exchange. Served as Deputy Director of Supply Chain Management Systems January 2005 to February 2007. Essential medicines and medical supplies procured and delivered to HIV grant programs funded by the U.S. Government under the President's Emergency Plan For Aids Relief (PEPFAR). Executive Vice President and CIO of Merisant July 2001 to December 2004. High intensity sweeteners manufactured and distributed in all world regions. Manufacturing Director for Monsanto Corporation July 1980 to July 2001. U.S., Belgium & Brazil

Engineering, Maintenance, Production, Supply Chain, ESHQ and Sales responsibilities in increasing supervisory roles. Regional responsibilities in Europe-Africa and Latin America. Agriculture, food ingredients, pharmaceuticals, plastics, mining, automotive parts and fine chemicals manufacturing activities.



Wilmar "Will" L. Boschman, President, Groundwater Storage Services, Inc.

 Has worked at various times both as consultant (23 years) and General Manager (27 years) for Semitropic Water Storage District for 50 years . Semitropic, established in 1958, covers an area of 220,000 acres serving approximately 140,000 acres having an irrigation demand of approximately 450,000 acre-feet per year Semitropic is one of eight water storage districts in California and is the largest in Kern County.. . It began as an irrigation district for the purpose of securing State Water Project supplies to reduce groundwater overdraft

Semitropic has developed and currently operates the worlds largest aquifer storage and most unique agricultural water delivery system on the planet.   The District delivers water to nearly 300 customers for irrigation of approximately 140,000 acres for agricultural uses. Semitropic also supplies energy to its water users and provides groundwater banking and storage services for districts and companies from San Francisco to San Diego. Developed in the early 90s. Semitropic began its groundwater storage program in response to several challenges from the 1980s, including:

. •    groundwater overdraft

•    rising energy costs

•    rising water costs

•    water shortages

•    poor agricultural economy

The development of the Semitropic Water Storage Bank was based on three primary objectives:

•    Increase water supply reliability.

•    Decrease the cost of water for irrigation.

•    Correct  overdraft in the groundwater basin.

Since its initial operation in the mid-1990s, Semitropic has received water for storage  from banking participants approximately 1.5 million  acre-feet in a groundwater storage bank with a permitted capacity of 1.65 million acre-feet and has recovered and returned approximately 800,000 acre-feet in drought years. The banking program contributes to meeting the drought-year needs of more than 20 million Californians at 15 to 20 gallons per person per day.