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Alan Midwinter

Head of Renewable Development

SGN Commercial Services


Alan Midwinter is a degree-qualified engineer who has worked within the gas industry for over 39 years, in both operational and senior management roles. During his career, Alan has gained a broad depth of knowledge within the gas sector.

Alan has led many award-winning projects and was IGEM’s Gas Industry’s Engineer of the year in 2015.

He has been at the forefront of developing the biomethane industry within the UK since its inception in 2009 and is now considered one of the country’s leading experts. A member of the Institute of Engineering Technology, Alan is also panel member on the Biomethane technical working group at the Energy Network Association (ENA) and sits on the Anaerobic Digestion and Biogas Association’s (ADBA) advisory board.

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Amaya Arias García

Business Development Manager – Innovation and Renewable Gas

Nortegas Green Energy Solutions


Dr Amaya Arias Garcia is an Anaerobic Digestion expert with over 20 years’ experience in process engineering, design, project management and plant operations working with agricultural residues, municipal food waste and industrial effluents.  She has worked in many countries and different plant capacities always keeping an eye on new technical developments and innovative solutions to maximise and optimise the products of AD. She recently moved to Spain after more than two decades based in the UK to help Nortegas Green energy Solutions realise their strategic goal of replacing natural gas by renewable gases.


Chris Maloney

Christopher Maloney

Chief Executive Officer

Entsorga Inc.


Mr. Maloney is a senior executive with over 35 years of global corporate management experience in the energy, renewables, water and waste management sectors and currently serves as CEO of Entsorga Inc., the North American division of the Entsorga Group, one of the world’s leading providers of solid waste treatment technologies for the production of renewable natural gas, solid engineered biofuel and organic fertilizer. Mr. Maloney also serves as President of the Integrated Biogas Alliance, a global confederation of leading technology, engineering, construction and service companies in the organic waste to renewable natural gas sector.

Previously, Mr. Maloney served as Global Head of Zenviro Tech’s Renewables business, Chief Executive Officer of The Capernaum Group, Chief Operating Officer of Digested Organics and Chairman & CEO of Amandla International in South Africa.

Mr. Maloney holds a BS in Engineering from the University of Illinois serves on several boards including Entsorga Inc., the World Biogas Association and Prime Quoin and recently represented the waste to energy and biogas industries speaking at COP 26 in Glasgow Scotland.

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Dr David Tompkins

Head of Knowledge Exchange and Innovation



David is an environmental scientist with a multi-disciplinary background encompassing horticulture, soil science, composting, anaerobic digestion, wastewater treatment, biowaste valorization, sustainability and market development. David is a technical consultant at Aqua Enviro – a UK-based wastewater and biowaste consultancy that forms part of the multi-national SUEZ Group.  His focus is on bioresources: understanding and overcoming technical, regulatory and commercial barriers to  new products derived from biowastes and similar materials. He has worked to develop UK digestate markets since 2008.

Harmen Dekker

Harmen Dekker


European Biogas Association 


Harmen Dekker has worked for almost 15 years within the sustainability sector and is devoted to the mitigation of climate change. With both a technical as well as a business administration background he has built his career in the water and gas sector, where he has held various management positions. He joins the EBA after being involved in the biogas sector for over 5 years. During those years, he not only focused expansion of biogas and in particular biomethane but also on the implementation of techniques such as bio-LNG, bio-Methanol, bio-Hydrogen and bioplastics. 


Jorge Hilbert

Profesional Asesor Nivel Internacional Instituto Nacional de Tecnología Agropecuaria Fundador de Energy & Environmental Consulting


Agronomical Engineer University of Buenos Aires, 1980 Master Degree Farm Mechanization Univ. of La Plata, 1990 Specialist Negotiation and change. UBA 2000 doctorate in Science and technology UNGS former National Coordinator of the Bioenergy program (2006-2014), former director of the Rural Engineering Institute INTA (2001-2006). Present International consultant of INTA in innovation activities. Member of the Scientific Advisory Board (SAB) of IINAS International Institute for Sustainability analysis and strategy. Participant of International Energy Agency working groups; participant of biogasdoneright initiative. Cochair of biogas committee Global Methane Initiative, Member of the steering comitee of the Life Cycle Initiative UN, Coordinator and professor biomass in the master degree cours
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Keith Simons

Principal Scientist

SHV Energy


An Industrial Chemist by training, and experienced in innovation management in sustainable energy and carbon abatement technologies, a key as aspect his the role is to advance the scientific base for producing fuels for SHV Energy’s group of companies  through the development of a global collaborative Research and Development programmes, identifying and developing technologies to support the ambitious corporate goal to ensure that 100% of SHV Energy’s products will be low carbon and renewably sourced by 2040.


Keith is also Chair of the World Biogas Association Policy, Innovation and Technical Committee

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