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SolarCraft Management Team

Avner Daabul, President/Chief Executive Officer

Avner Daabul has been in the solar industry since 2005 and brings with him more than 20 years of leadership and experience in the electrical and renewable energy field. A C-10 (electrical) and C46 (solar) licensed contractor, Avner started his electrical career in the Israeli Air Force,  then moved on to work with commercial and private jets in one of the world’s leading aerospace companies. He brings his passion for renewable energy to work with integrity and a strong commitment to efficiency and success. Avner lives in San Rafael  with his wife Dawn, three kids and their dog Louie.

Chet Stromberg, Director of Residential Sales

Chet brings over 25 years of direct renewable energy project development including project management, engineering services, and sales & marketing experience. Chet has personally sold, engineered and managed over 500 residential and commercial solar projects. After graduating with Renewable Energy Engineering, Chet volunteered his service to the US Peace Corps and served in the Cook Islands, Polynesia. Chet was successful as Sales Manager for Silicon Valley with Real Goods and then Director of Business Development with Sun First Solar. Chet is a 3rd generation Marin resident, living in Mill Valley with his three children.

Robert Gould, Director of Commercial Sales

Robert Gould has been in the solar industry since 2005, developing, designing and supervising the installation of commercial and residential solar systems. He now is focused exclusively on developing and managing SolarCraft’s commercial solar efforts. He has over 20 years working in sales, marketing, product development and organization development in green and socially-responsible businesses. He was a President of GreenLight Solar and Director at Charles Schwab, and holds an M.A. in Sustainable Management.  Robert lives in Mill Valley with his wife and son.

Brian Costa, Director of Operations

Brian has been in the solar industry since 2004 when he started as an installer. He completed his education in 2005 with a degree in Energy Management and Design from Sonoma State University. Brian has experience in all aspects of the solar photovoltaic industry holding positions as drafter/designer, construction manager for a PPA/system owner and both residential and commercial project manager. He recievedNabcep certified solar installer  his NABCEP Certification in 2009.  Since then, Brian has focused his efforts solely on commercial construction project management, completing challenging projects for various industry sectors including: water districts, cities improvement projects, educational facilities, public municipalities, agriculture, manufacturing, cold storage/ distribution as well as multiple project sites located across state lines (AZ & MO). Brian lives in Novato with his young family which he enjoys spending his free time with.  His hobbies include drumming, hiking, snowboarding and pyrotechnics.

Pat Knoff, Controller

Pat Knoff Served in the Marine Corps from 1985 – 1993. He is a Veteran of Operation Desert Storm. He continued from there to follow his passion for computers as a Software Developer/Programmer for entertainment and educational multimedia projects with Ion, Inc. After 3 years with Ion, Pat moved on to work for 10 years as an Independent Contractor on multimedia products. During his time with Ion and as a Contractor, Pat worked for Companies/Artists such as Seagate, Primus, Todd Rundgren, Macromedia, Apple, and Microsoft. In 1999 Pat moved to Southern California and took a job with the Marine Corps as a Civilian Contractor, managing their Combat Issue Facility. After successfully deploying Marines to combat overseas, he traveled to various Marine Bases around the world, setting up operations and database systems to manage inventory. Pat moved back up to Marin in 2009 and was hired at SolarCraft as the Service Dispatcher in 2010. Pat developed SQL data mining skills during his tenure in the Service Department, providing reports for many departments at SolarCraft. These skills allowed him to take advantage of an opportunity to transition into Accounting as the Controller for SolarCraft.

Riley Riggs, Service Manager – Photovoltaic Division

nabcep-riley-riggsRiley Riggs started his solar career in 2006 after graduating with a BS from Cal Poly San Luis Obispo where classes he took in the renewable energy field sparked his interest and passion. Before coming to SolarCraft as a Project Manager in 2008, Riley worked as an installer at Hudson Valley Clean Energy in Rhinebeck, New York and for Borrego Solar based in Berkeley, CA. While at SolarCraft he has managed over 200 projects, both residential and commercial and he gained NABCEP certification in 2009. Now as the PV Service Manager, Riley leads the SolarCraft service crew with passion to uphold the company core values of Quality, Integrity, and Respect. Riley lives in Vacaville with his wife and three children.

Rob Baum, Sales Manager — Thermal Division

Rob Baum started his career in the Solar Industry in 1980 as a crew chief for Solar Energy Sales Inc. At Solar Energy Sales he met and worked with Bill Stewart and Dennis Nuttman who in 1984 began SolarCraft in partnership. Over the years Rob has worked and been trained in the residential and heavy construction industries, doing inside and outside sales. In 2003 he began working with SolarCraft as the estimator for Solar Thermal. Predominately doing outside sales for Solar Thermal, Rob has been awarded repeatedly as a top producer in sales of FAFCO products. FAFCO is the largest producer of solar thermal collectors in the US. A longtime Marin Resident, Rob lives in Novato with his wife.

Marcus Rome, Operations/Service Manager —  Thermal Division

Marcus Rome has over 25 years of experience in the construction industry. Joining SolarCraft in 1996 as a crew chief and service technician, Marcus has been factory trained by many of the leading companies in the industry including Fafco, Heliodyne, and Pentair. Having worked as the Thermal Service and Operations Manager since 2010, Marcus is committed to the high standard of customer service and quality installation practices put into place almost three decades ago by founders Bill Stewart and Dennis Nuttman. Marcus is a Marin County native, raised in Novato where he still lives with his wife and two children.


Bill Stewart, Chairman/Co-Founder

nabcep, solar certifiedBill Stewart joined the solar industry in 1978, co-founded SolarCraft in 1984 and has since helped to build one of the most recognized names in the industry. Bill holds B (General Building), C10 (electrical) and C46 (solar) contractor’s licenses and has served as a Subject Matter Expert for the California State Licensing Board for the development and update of the C46 Solar License requirements for over ten years. He is one of a few individuals who has been certified both in Photovoltaic and Thermal technologies, as well as Technical Sales and Design, by the North American Board of Certified Energy Practitioners (NABCEP). Bill serves on the Board of Directors of both the California Solar Energy Industries Association (CALSEIA), and the Marin Economic Forum and is also a member of the North Bay Leadership Council. Bill and his wife Deborah are longtime Sonoma residents where they also own and operate SoloQuest Learning Center, an accredited private school where Middle and High School students learn through individualized and small group instruction.

Dennis Nuttman, Director/Co-Founder

Dennis Nuttman has over 30 years experience in the solar industry and co-founded SolarCraft in 1984. Dennis graduated from USF in 1975 with a BA. He has sold, designed, installed, or managed the installation of over 4,000 systems in Marin and Sonoma. Dennis is a life-long resident of Marin County, he and his wife have lived in Novato since 1977.

Jeff Asch, Director

Jeff Asch is an experienced corporate leader with a proven track record of successfully growing small businesses, and has provided business guidance to SolarCraft for many years.  As a Board Member and consultant, Mr. Asch led the ESOP transaction enabling the founders of SolarCraft to transition the company to 100% employee ownership. Previous to the appointment to the Board of Directors, Mr. Asch was interim Chief Financial Officer at SolarCraft for one year in 2012.  Mr. Asch currently holds the position of Chief Operating Officer at DC Electric Group, a union specialty electrical contractor.  Earlier in his career, Mr. Asch served as Vice President of  Noresco, an Architectural Energy Corporation from 1994-2002;  Vice President/CFO of Republic ITS, a Siemens Company from 2002-2011; and more recently as Chief Executive Officer of Cartelligent,  a leading alternative car buying service company from 2013-2015.

He holds a Bachelor’s degree in Government from Wesleyan University in Hartford, Connecticut and a Certificate in Energy Management and Design from Sonoma State University in Rohnert Park, CA.