top of page
Our People
Hill Headshot.jpg

Mark Hill


Mark Hill has been involved in landfill gas and anaerobic digesters for more than a decade.  As Vice President of Operations at DTE Biomass Energy, Mark was responsible for the safety, management, and profitability of 21 Landfill Gas to Energy Projects and 7 Dairy Manure to Vehicle Fuel projects  - one of the largest portfolios in the industry.  In this role he helped launch the first seven dairy anaerobic digester to vehicle fuel projects in Wisconsin, including the first virtual pipeline project that uses CNG trailers to move RNG from remote locations not on an interstate pipeline (American Biogas Council's 2019 Project of the Year).  


Prior to working for DTE Energy, Mark worked in the cement industry and was an officer in the Michigan Army National Guard. Over his twelve years in the Army, Captain Hill served in many roles, including Logistics Officer and Cavalry Troop Commander in Operation Iraqi Freedom.

Williams Headshot.jpg

Jared Williams 


Jared Williams has more than a decade of experience managing 10 dairy projects and 20 landfill gas projects across the country.  As Vice President of Operations for DTE Biomass Energy,  Jared led an 80 person team that saw plant on-stream rates above 90% across its fleet.  Jared's dairy RNG projects were some of the first in the country to receive a provisional CI score from the California Air Resources Board and have been among the most successful built to date.  Jared began his career managing landfill gas collections systems while earning his Bachelor of Arts Degree from Arizona State and his MBA from University of Michigan.  

brubaker headshot.jpg

Matt Brubaker

Chief Financial Officer

Matt has over twenty years of experience in public accounting, financial reporting, and the accounting and sale of renewable attributes associated with Renewable Natural Gas.  In his previous role he was the Controller for DTE Biomass Energy where he oversaw the accounting of over 30 renewable energy projects and proper recognition of renewable attribute sales.

In his current role, Matt is responsible for the proper accounting of projects under construction, in operations, and the sale of our renewable attributes.  

Matt is a Certified Public Accountant and holds a Bachelor's degree in Accounting from Central Michigan University.

Covell picture2.jpg

Rick Covell
Vice President of Engineering and Construction

rodney headshot 3.jpg

Rodney Taylor 

Vice President of Operations

Rodney has over twenty years experience in Natural Gas Processing at Superior Pipeline as the Director of Operations, managing a CAPEX budget of several hundred million per year. Rodney also has a background managing Class III dairy process facilities and developing energy projects in North America and Asia.


In this current role, Rodney is responsible for the safety, operations, and meeting the ongoing commitments we have to our dairy partners.

Rick has over 25 years of experience in Landfill Gas and Renewable Natural Gas with previous experience at Aria Energy and NextEra.  

In his current role, he leads a 12 person team responsible for permitting, design, engineering, and construction of Novilla RNG's projects without the use of an EPC contractor.

bottom of page