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ASC Water & Energy Team

We are committed to driving positive change through innovative sustainable solutions – creating a better future for our planet by combating climate change.

 

We bring our combined experience to solve green power challenges for our customers and the growing issues for millions of people and the future of how we live.

Core Team Members

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David Reavley

Executive Chairman

David is a highly experienced executive who has held board positions in the UK and internationally with renowned companies, bringing new innovations into the marketplace. In the last 8 years, he has been focused on sustainability issues, visiting over 20 countries.

David can be best described as the Innovations Launcher. In his past, he has been responsible for launching several tech firsts in office automation and telecommunications, including GSM and messaging. He continues into the millennium to pioneer with his involvement with sustainability to bring about global change in solving water scarcity and renewable energy needs, also create a better future for our planet by helping combat climate change

David is a frequent speaker at conferences, a published author in his industry and a visiting lecturer at University College London.

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LinkedIn Profile

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Ngen Yap

CFO

Ngen has served as a CFO for over 12 years and held senior commercial and finance roles in his career. He spent 15+ years at WPP before involving himself purposefully in green tech innovations over the last 4 years.

Ngen is not your typical CFO. In his past, he disrupted and improved established business models, developed and optimised partner ecosystems and used his role as CFO to facilitate, not constrain.

As a person passionate about people and business, he also plays advisory roles to SMEs on growth and funding. Ngen is a fellow of the ICAEW and speaks fluent Malay.

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LinkedIn Profile

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Prof. Ayman  Al-Maaitah

CTO

Professor Ayman is a multi-awarded engineer, scientist and inventor with international prizes for his work in solar energy from the US, UAE, Jordan and others. He registered more than 14 international patents in the US, European Union, Australia, Japan, China, and GCC, and has designed many innovative projects in solar energy and CSP worldwide.

Previously, he was an academician and ex-research associate in NASA.

Residing in both Jordan and the UAE, Professor Ayman appreciates the changing environmental landscape due to climate change. Today, he is focused on bringing to market the ASC technology to deliver the needed positive impact.

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LinkedIn Profile

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James Whitehead

CEO

James is an experienced and ambitious executive with a proven track record of scaling businesses. He has led teams accelerating the growth of early-stage ventures across the green energy transition, including concentrated solar power, the hydrogen value chain, EV, and carbon capture. Previously CEO of JWT and a Business Unit Lead at WPP, he now also serves as Chair of an AI scale-up. James combines commercial acumen, operational expertise, and deep stakeholder engagement to accelerate the company’s mission.

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LinkedIn Profile

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Guy Reavley

COO

Guy has been involved in sustainable energy since 2020. Before that, he held executive positions with Cisco and HP within strategy, planning and operations, business development and sales.

Guy has started, built, and sold three companies in Networking, Mobile Telephony and Internet Service Provision.

With his experience, Guy has a track record of optimising, supporting, adapting and developing innovations to make them market ready.

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LinkedIn Profile

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Gonzalo Guerra Ceppi

Head of South American Markets

Gonzalo is a business development executive with more than 10 years of experience in the Energy, Tech and Venture Capital industries.

He has worked for major companies in Chile and has opened markets for companies and startups all over the region.

He has also worked for Chilean NGOs on Education and Social Development.

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Partners & associates

​Connected to a larger ecosystem of technology and execution partners and associates – together we have a wealth of expertise in designing, delivering and financing sustainable green energy projects

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Supported by the British Government

We have established relationships with the UK Department for Business & Trade (DBT) in all of our key markets; from whom we receive endorsements and introductions

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©2025 by ASC Water & Energy. 
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