Meet the Team

The CalBio – 4 Creeks team have been focused on dairy development in the San Joaquin Valley for over 10 years. We are the industry leaders in design, project development, and project operations as well as in participating in state incentive programs and financing successful projects.

Our team of the combined forces of CalBio and 4Creeks bring years of dairy operations and digester know-how.

N. Ross Buckenham 

Chairman and CEO

Ross is a twenty-five year general management veteran and builder of technology ventures both public and private. His experience spans the renewable energy technologies of biogas, wind and solar. He has built and run software and wireless technology companies being a board member, CEO or general manager in companies such as WebLink Wireless, Retek, CellStar and Advanced Oxygen.


He was previously a consultant with Bain & Company. Ross is passionate both in his pursuit of California Bioenergy’s mission to become a large California focused renewable energy and clean tech company leveraging dairy, agricultural and organic waste streams and also in developing “Level 5” leadership, operational excellence and exceptional customer service in himself and his management team. He has been an active member of dairy industry initiatives focused on the incentives to create a viable dairy biogas industry, including SB 1122 (the electricity BioMAT) and AB 1383 (providing fuel incentives).


Ross has an MBA from Harvard Business School and a Bachelors Degree in Chemical Engineering from Canterbury University, New Zealand.

Neil Black


Neil has over twenty-five years of senior management experience and plays a key role in the operations, development and financing of CalBio projects. He has also played an ongoing role in the state programs, incentives and legislation to lead to successful manure-methane capture projects.  CalBio was worked closely with Dairy Cares, AECA, among other dairy groups. It was also a founding member of the Bioenergy Association of California, and Neil was its first chairman. Working in partnership with the dairy industry, Neil was involved in the development of the BioMAT and is now focused on creating effective revenue programs for vehicle fuels. Prior to joining CalBio Neil was managing principal at GreenOrder, a leading sustainability firm, which worked with GE, GM and other large companies.


Neil was also the CEO of two technology start-ups and president of The Nation magazine. He is an advisor to the Broadscale Group. Neil has an MBA from Harvard Business School.

David DeGroot

Vice President 4Creeks / Strategic Partner

Mr. De Groot, a co-founder and partner in 4Creeks, is a professional civil engineer in the Central Valley of California. For more than thirteen years he has leveraged his skills to assist both private and public entities with land development, public works projects, water resources engineering, and agriculture engineering. 4-Creeks works with over 200 dairies in the San Joaquin Valley, assisting them with regulatory compliance, CEQA permitting, building permitting, and expansions/remodels. Mr. De Groot’s roles include working with many public water agencies within the southern central valley as the assistant watermaster managing surface water diversions, Technical Lead for the state’s irrigated lands regulatory programs, the states Integrated Regional Water Management Program, and most recently the state’s Sustainable Groundwater Management Act regulations.


Mr. DeGroot is a native to the San Joaquin Valley, having grown up on an existing dairy farm just outside the City of Tulare.