To provide worm powered regenerative solutions that enable companies and communities to filter water, build soil health, and offset their carbon footprint. In doing so, we cultivate a harmonious relationship between people, planet, and profit.
Francisco del Toro
Chief Financial and
With nearly 20 years of leadership experience in both the public and private sectors, Cheri oversees the financial success and sustainability of BioFiltro while also building company culture. Before BioFiltro, Cheri spent almost 10 years at the U.S. Government Accountability Office (GAO), and was COO of the Yu Ying Charter School. She has extensive experience in budget analysis and operational effectiveness.
Vice President of Operations
Paul is an industrial engineer who brings more than 20 years of experience in wastewater treatment, waste management, power generation, thermo drying, and desorption to BioFiltro. Originally from Canada, he is passionate about climate change, regenerative practices, and water.
Director of Regeneration
Mai Ann Healy
Chief Impact and Sustainability Officer
Vice President of Product Development & Quality Assurance
Patrick is an environmental engineer and industrial ecology professional passionate about issues at the nexus of water, agriculture, climate change, and environment. He leads BioFiltro’s environmental biotechnology product development and provides technical and quality assurance support to BioFiltro clients. Patrick holds a B.S. in Physics and Mathematics from Missouri Southern State University, and an M.S. in Chemical Engineering and Environmental Engineering from UC Davis, where he also earned a graduate certificate in Industrial Ecology.
In previous professional roles Patrick has led quality control efforts for complex battery assemblies, conducted research on advanced lithium-ion battery electrodes, and later managed energy and sustainability projects for large corporate clients in the telecommunications industry. In his academic career, Patrick has worked with Astrobiology and Planetary scientists at NASA’s Jet Propulsion Laboratories on research concerning methane cycling on Mars and carbon and nitrogen cycling at submarine hydrothermal vent systems. For his thesis research at UC Davis Patrick conducted experimental studies on the application of iron nanoparticles for chemodenitrification and more recently conducted Life Cycle Assessments for water resource recovery technologies that generate co-products such as non-potable water for irrigation, soil amendments, or alternative forms of protein.
Steve Worrell, P.E
Vice President of Engineering
Design Director & Board Member
Jeff Tweddale is an advocate and investor in BioFiltro since 2019. He is also the President and co-founder of BookingCenter, providing hospitality clients and travel destinations with Property Management Systems, Central Reservation Systems, and global distribution opportunities. Prior to founding BookingCenter, Jeff created the The InternetCorps to deliver innovative e-commerce and e-marketing solutions to such market leaders as Sun Microsystems, Visa USA, and LaserLine. In the early days of the Internet, Jeff served as Product Manager for one of the first Internet businesses, America Online’s Global Network Navigator (GNN). While there, he supervised the software development of AOL’s first internet programs (email, chat, publishing, etc) while overseeing the service’s Web community of more than 300,000 users. Jeff also led AOL’s Consulting Services Group, leading the technical research, development, and implementation of a wide variety of new media projects for Fortune 500 clients.
CHIef Operating Officer
David Warner is the founder and owner of Redhorse Constructors where for the past four decades he has been working on new urban formations around sustainable and resilient infrastructure and construction systems.
He is also the co-founder of Human Needs Project which addresses the lack of basic services common in underserved urban populations.
With a focus on green building, David has turned Redhorse into one of the nation’s premier custom home builders, receiving a number of awards including Builder of the Year by the NAHB (USA), AIA, projects published in Scientific American and Architectural Digest, including achievement awards from local and industry organizations.
David received his undergraduate degree from the College of Natural Resources at the University of California, Berkeley and his teaching credential in Biology from San Francisco State. He is an advisory board member at UC Berkeley College of Natural Resources Advisory.
Stephen is a Davis-based water expert (and RPCV!) who runs McCord Environmental, a consultancy for municipalities, non-profit organizations, utilities, tribes, corporations and government agencies managing water quality.
Fred has worked for decades in California-based fruit, nut, and vegetable processing companies, currently executive leadership at: BCFoods . Fred also works at non-profits and other agricultural producers in the Sacramento Valley area.