Our Team
We are a highly qualified team of over 200 professionals with backgrounds in the chemical industry, waste and recycling management operations, alternative technologies development, project finance and regulatory markets.
Ian Temperton
Chief Executive Officer
David McNamara
EVP Chief Technology Officer
Rajesh Kumar
Chief Financial Officer
Greg Joynson
General Counsel
Alessia Alberoni
Vice President Sales & Corporate Development EME&A and Americas
Ying Staton
Chief Sustainability Officer / VP, Asia
Daniel De Sousa
Vice President of Digital Technologies
Alberto Medina
Chief Operations Officer
Christopher Strivens
Vice President Product Delivery
Susan Fitzsimons
Head of Communications
Board Members
Mark Poole
Chairman
Dr. Karl Altenburg
Vice Chairman
Ralf Huep
Member of the Board
Tim Summers
Member of the Board
Ian Temperton
Chief Executive Officer
Ian is Plastic Energy’s Chief Executive Officer and previously served as the company’s EVP of Sales and Corporate Development and Chief Investment Officer. He has over 25 years’ experience in the energy sector, focussing on clean energy financing. Ian was a Managing Director at the investment and advisory firm Climate Change Capital for 11 years, and sits on the Advisory Board of the UK Energy Research Centre. He holds a Master of Arts and Master of Engineering from Cambridge University, and M.Sc. in finance from London Business School. He is a former Visiting Business Fellow at the Smith School for Enterprise and the Environment at Oxford University.
David McNamara
EVP Chief Technology Officer
For over a decade David has led the development of Plastic Energy’s ground-breaking technology and is the company’s EVP Chief Technology Officer. His responsibilities range from creating and executing the company’s technology roadmap, to structuring multiple high-profile strategic partnerships across the world. David has written a series of patents, granted internationally, for the organisation. He has worked in a broad variety of senior leadership roles for over 20 years, across telecommunications, construction, waste, and recycling. David has a joint honours degree in Chemistry and Polymer Chemistry with Technology from Loughborough University.
Rajesh Kumar
Chief Financial Officer
Rajesh, Plastic Energy’s Chief Financial Officer, is a Chartered Accountant with nearly two decades of experience across the audit, oil and gas and utilities sectors. He leads the company’s finance team, after previously holding senior finance positions with Interconnector (UK) Limited and Bristol Water plc. Before moving in-house, Rajesh spent eight years between KPMG and EY, performing audits and due diligences across the energy, oil, gas, retail and telecommunication sectors. He has also worked on business transformation initiatives around corporate and financial restructures, end-to-end business process redesign, system implementation, and business cost rationalisation.
Greg Joynson
General Counsel
Greg is Plastic Energy’s General Counsel. He has 20 years of experience working in law firms, both international and domestic. Greg has extensive experience advising businesses on mergers and acquisitions, joint ventures, debt funding, intellectual property, commercial agreements, compliance and corporate governance. He holds a law degree from the University of Manchester and attended Nottingham Law School. Greg is qualified as a solicitor in England and Wales.
Alessia Alberoni
Vice President Sales & Corporate Development EME&A and Americas
Alessia is Plastic Energy's Vice President of Sales and Corporate Development for the Western Hemisphere, driving the company’s strategic growth and partnerships. She has over 20 years of experience in the petrochemicals industry, spanning strategy, business development, sales and marketing, advocacy, and sustainability. Alessia has held senior roles at BP and INEOS and served on the Board of Directors of BP Aromatics and INEOS Aromatics. She spearheaded sustainability initiatives at BP, including the launch of BP PTAir, the industry's first carbon-neutral polyester precursor, and BP's ground-breaking chemical recycling technology for PET, Infinia. Alessia also played a pivotal role in developing BP's Downstream Plastic Strategy.
Ying Staton
Chief Sustainability Officer / VP, Asia
Ying is Plastic Energy’s Chief Sustainability Officer, based in Singapore, where she also leads the company’s commercial activities and business development in Asia. She previously worked across British government departments, including leading research at 10 Downing Street for former Prime Minister David Cameron. Before joining Plastic Energy she was Head of Asia at the strategic advisory firm, Global Counsel. Ying graduated summa cum laude with a Bachelor of Arts in Classics and English from Oxford University and a Master of Arts in East Asian Studies from Yale University, where she was a Henry Fellow. She is fluent in English and Mandarin Chinese, and a CFA charterholder.
Daniel De Sousa
Vice President of Digital Technologies
Daniel de Sousa is Plastic Energy’s Vice President of Digital Technologies and has been with the company since 2018. He has over 20 years of experience in control automation, IT infrastructure, and operational technology, spanning roles across multiple industries, including recycling, oil and gas, and manufacturing. During his time at Plastic Energy, Daniel has grown and led a multidisciplinary team, delivering cutting-edge solutions in automation, network security, data analytics, and digital transformation. Previously, he held senior positions at ASR Group and Tate & Lyle, where he spearheaded global EC&I strategies, regulatory compliance, and advanced process control systems. Daniel holds a Bachelor of Electrical and Electronic Engineering (with Honours) from the University of Canterbury and is a Chartered Engineer with IET.
Alberto Medina
Chief Operations Officer
Alberto Medina is Plastic Energy’s Chief Operations Officer and previously served as the company’s Chief Operations Readiness Officer. He has over 25 years of experience across production operations, maintenance, health and safety, and business management duties at large industrial facilities. His career began in the oil and gas industry, before transferring into the cleantech sector. Outside of his role with Plastic Energy he supports Seville University with academic programmes, including their Maintenance Master course and the orientation programme for recent graduates from Seville’s College of Engineers. Alberto holds an MBA and Masters in Engineering from Seville University. He also holds two additional Masters in Health and Safety; the first focused on industrial safety, and a second on Industrial Health, Applied Ergonomics and Psycho-sociology at Work.
Christopher Strivens
Vice President Product Delivery
Christopher serves as Plastic Energy’s Vice President Product Delivery, leading the team responsible for delivering new projects and partnerships. Previously, he held key roles as the company’s Head of Technology Development and Head of Engineering. He brings over 17 years of experience in industrial engineering, specialising in product development and delivery across a range of sectors, including waste management, water treatment and petrochemicals. He is a Chartered Environmentalist, Chartered Engineer, and Chartered Resource and Waste Manager. He holds a Bachelor of Science degree in Chemical Engineering from the University of the Witwatersrand in South Africa.
Susan Fitzsimons
Head of Communications
Susan has 10 years of experience in the marketing and communications field, starting her career in the charity sector, working for Oxfam Ireland, before moving on to the corporate world to join a digital marketing consultancy. Throughout her career she has focused on events, digital marketing, and communications for companies across the legal, advertising, and sustainability sectors in both the US and UK. Before joining Plastic Energy in 2020, Susan worked as a Marketing and Brand Manager for London-based sustainability consultancy, the Carbon Trust, and lead marketing and comms for a programme for small businesses to become more sustainable. Susan holds a B.A. in Communications and Social Science from the University of Central Florida, and an LL.M. in International Human Rights Law from the National University of Ireland, Galway.
Mark Poole
Chairman
Mark Poole started his career in Investment Banking with Credit Suisse First Boston and JP Morgan before co-founding BlueBay Asset Management in 2000. He was Chief Investment Officer of the firm until its sale, in 2015, to Royal Bank of Canada when it had USD 40bn under management. BlueBay specialised in active credit market investment and managed strategies that included Corporate Credit both public and private, Distressed Credit and Special Situations, Emerging Market Investing and Convertible debt. Since 2015 Mark has focused on Venture Capital Investing via a Family Office structure and was first appointed to the Board of Plastic Energy in 2024.
Dr. Karl Altenburg
Vice Chairman
Karl worked more than 25 years in Investment Banking. Until June 2016 he was Co-Head Corporate Finance Europe, Middle East & Africa at Deutsche Bank in London and a member of its Corporate Banking & Securities Executive Committee. Prior to that Karl worked over a period of 20 years for JPMorgan, in New York and London in various roles in Capital Markets and Corporate Finance and from 2005 to 2014 in Frankfurt as CEO for Germany, Austria & Switzerland. In 2000 he co-founded Inquam Ltd, a specialist provider of professional mobile telecommunication services, for which he served as CFO until 2004. Karl serves as a Senior Advisor to Citigroup and member of its EMEA Advisory Board. He holds a degree in engineering from RWTH Aachen and a doctorate in technical science from the University of Technology in Vienna.
Ralf Huep
Member of the Board
From 1991 to 2019, Ralf has been with Advent International, a world leading private equity firm. Throughout the years he led over 35 investments. His function as Managing Partner included multiple investment committees and for 7 years he was Co-Head of the Executive Committee at Advent International. Prior to joining Advent, Ralf was a Financial Analyst at Veba AG, a German industrial and energy conglomerate and a Project Manager in the Mergers and Acquisitions department of Continental AG, a leading European tyre manufacturer. Ralf has a degree in Business Administration from the University of Bielefeld. Most recently he has been building a portfolio of private companies among which is also a shareholder in PLASTIC ENERGY.
Tim Summers
Member of the Board
Tim Summers is the Managing Partner of L1 New Energy. Prior to joining LetterOne, Tim has over 30 years of experience including multiple Chair, Board and Executive roles in manufacturing, engineering services and the energy sector in a variety of public and privately-owned businesses. He has lived and worked in South America, the Middle East and Russia, as well as in continental Europe. Tim is a Chartered Engineer and a Fellow of both the Institute of Chemical Engineers and the Institute of Materials, Minerals and Mining. He has a degree in Chemical Engineering from the University of Manchester.
