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About Us

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Hestia Home Biogas was launched in Eugene, Oregon in 2012 by co-founders Warren Weisman and David Rasmussen. The company is relocating to Seattle, Washington in 2014 and is a C-Corporation registered in the State of Delaware.

Warren Weisman, Co-founder & CEO

Founder and CEO Warren Weisman is an internationally recognized expert on biogas and anaerobic digestion. He has over 25 years of building experience and has worked as a heavy equipment mechanic and power plant operator. He has written articles about biogas for Renewable Energy World, Post Carbon Institute Energy Bulletin, Permaculture Magazine and The Energy Collective.


David Rasmussen, Co-founder & COO

Co-founder & COO David Rasmussen brings 22 years of mechanical and residential and commercial building experience to Hestia Home Biogas. He is an ASE certified mechanic with extensive municipal wastewater construction experience. David oversees biogas projects downstream of the first gas shut-off valve, including plumbing and piping, converting engines or appliances.

Jerry Vellukunnel, Marketing Assistant

Marketing assistant Jerry Vellukunnel attends City University of New York’s Baruch College Zicklin School of Business where he is completing his studies for his MBA with an emphasis on entrepreneurship and sustainability. 

Mike Moyer, Attorney

Attorney Mike Moyer is a Partner in Seattle’s Cairncross & Hempelmann’s Corporate practice group. He focuses on supporting growing technology companies, and handles a wide variety of complex corporate finance, securities and commercial transactions, including public and private equity and debt offerings, mergers and acquisitions, licensing transactions, and the formation of partnerships, strategic alliances and joint ventures. In recent years, he has worked extensively in the clean technology sector and currently represents some of the region’s most promising clean technology and sustainable industry companies.


National Geographic Explorer Thomas Henry Culhane, Ph.D. teaches sustainable energy at Mercy College in New York City.  BA from Harvard, Ph.D. from University of California Los Angeles. Professor Culhane has traveled extensively teaching and demonstrating biogas technology, and installed the UN’s first biogas digester at the UN compound in Baghdad’s Green Zone.

Sumedh Bapat of Noble Exchange Pvt. Ltd. in Pune, India brings to Hestia Home Biogas his vast experience designing, engineering and building 40+ municipal scale biogas projects, including a 600 ton per day continually-stirred distillery waste digester in Satara, India producing over 1 Million cubic feet of biogas per day.