Site icon Producer Accountability for Carbon Emissions



Hugh Helferty

Co-Founder and President

Hugh Helferty has over 30 years of experience in the energy industry, resulting in a deep understanding of both conventional and clean energy technologies and how climate change needs can be met in the U.S. and globally. In his long career at ExxonMobil, Mr. Helferty led major research, engineering, and manufacturing organizations. More…

Jessica Nacheman


Jessica Nacheman has been an attorney for 37 years, primarily counseling major U.S. energy companies on regulatory matters.  Since her retirement from ExxonMobil in 2015, Ms. Nacheman has devoted her time to a number of issues of importance to her, with a particular emphasis on climate change. More…

Jane Savage


Jane Savage has 37 years of experience in the Canadian energy industry focused in fuel supply and trading, oil refining and advocacy at the federal level. She has led organizations in an executive capacity and brings a deep understanding of the commercial drivers, technical capacity of, and the responsibility of Canadian energy companies to be leaders in driving the energy transition. More…


Myles Allen


Myles Allen is Professor of Geosystem Science in the School of Geography and the Environment and Department of Physics, University of Oxford, and Director of the Oxford Net Zero initiative. Ever since his research in the late 2000s identified the need for net zero carbon dioxide emissions to halt global warming, he has focused on the implications, including the potential of a Carbon Takeback Obligation (CTBO). The research Myles has led about the CTBO, as well as other CTBO-related resources, can be found at More…

Ross Belot


Ross Belot had a long career with Imperial Oil, a Canadian ExxonMobil affiliate, before retiring in 2014. He now devotes his time to photography, documentary filmmaking, and writing. His writing on climate change has earned him a name as a regular columnist and celebrated poet. More…

Mark Disko


Mark has 36 years of experience working in the energy industry with ExxonMobil. His research at Exxon focused on applied physics, materials science, sensing and nanotechnology. His knowledge and expertise are relevant to advancing permanent carbon storage, which is central to PACE’s mission. More…

Stephen Gibbons


Stephen Gibbons is one of the founders of BlackGreen, a charitable foundation focused on business participation in carbon dioxide reduction. BlackGreen advocates for science-based solutions and promotes CCS projects. Stephen worked in the oil industry for three decades. More…

Margriet Kuijper


Margriet Kuijper is a civil engineer whose 30-year career at Shell included specializing in climate change and Carbon Capture and Storage (CCS). Since 2016, she has worked as an independent consultant on CCS, Carbon Dioxide Removal (CDR) and climate policy. Together with De Gemeynt and RoyalHaskoningDHV, Margriet is currently working on a study of the potential of a Carbon Take Back Obligation (CTBO) to ensure timely reduction of the emissions of fossil fuels. 

Producer Accountability for Carbon Emissions

Back to top