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energy & water
the two most essential things our society relies on

The biggest and most complex problem the world is working on today is that of achieving a low-carbon economy while striving to maintain energy balance:  

Energy balance graphic

security of energy supply

affordability and equity

environmental sustainability


Water must be the fourth focus in order for us to achieve a stable, equitable and prosperous future for our children and grandchildren.

We formed sustain:able because we are passionate about finding a balance to the energy trilemma and ensuring everyone has access to clean water

experience, understanding and a unique perspective

We have a background in geoscience and engineering and bring over 50 years combined experience in the global energy and extractive industries. 

Dr Rachel Gavey at sustain:able
Dr Rachel Gavey Bath UK

Dr Rachel Gavey

Rachel is Co-founder of sustain:able and her focus is on encouraging collaborative workflows between companies and individuals in order to develop ideas that can make a real impact on the increased and sustainable production of clean energy and water.

Rachel has a PhD in Marine Geology, a BSc in Geological Oceanography and has many years experience working in the energy industry around the globe in technical roles and leading complex projects. Technology forms the centre of all Rachels’ projects; she is incredibly passionate about the smart use of technology for solving problems, especially when those problems relate to the energy transition.

As a Board Director of the Scottish Energy Forum, she places herself at the forefront of the most topical energy discussions and enjoys generating discussion on a variety of topics including climate change, energy and diversity.

Dr Rosalie Constable - Cambridge UK
Dr Rosalie Constable at sustain:able

Dr Rosalie Constable

Rosalie is Co-founder of sustain:able and believes it’s critical to understand the complex role energy plays in our society and strives to balance energy security, equality and sustainability. 

Rosalie has a PhD in Earth Science from the University of Adelaide and over 20 years’ working in various technical, asset management and team leader roles in the oil and gas industry. In 2021, Rosalie completed the University of Canterbury Energy InTIME© course in Transition Engineering - a practical, interdisciplinary approach to finding innovative solutions for a more resilient and sustainable future. She has also completed ISO 14064-1 and 14064-2 certifications for GHG Emissions Accounting and GHG Projects for Reducing Environmental Impact.

Rosalie's global project experience highlighted to her the incredible importance and responsibility of providing clean, reliable and affordable energy and water to all - the drivers for her work at sustain:able.

Dr Gabby Watson at sustain:able

Dr Gabby Watson

Having previously focussed their studies on oil and gas exploration, Gabby has shifted their focus to sustainable technologies and emerging low carbon energy sources. Specialising in research of complex topics and report writing, Gabby is passionate about facilitating clear communication and helps bring together knowledge on the latest sustainability strategies and innovations. 
Gabby has a PhD in Faults and Fluid Flow from the University of Canterbury, a master’s degree in Petroleum Geology from the University of Manchester and a bachelor’s degree in Geology from Imperial College London. Gabby has also completed ISO 14064-1 and 14064-2 certifications for GHG Emissions Accounting and GHG Projects for Reducing Environmental Impact.

Gabby spent five years in New Zealand for their doctorate and two years in Denmark to learn the language, and since returning to the UK, is putting their international insights and unique perspective to good use as a valuable member of the sustain:able team.

Amanda Location.png
Dr Amanda Turner at sustain:able

Dr Amanda Turner

Amanda has a BSc in Geological Sciences and a PhD in Clastic Sedimentology and Palaeomagnetism from Aston University. She also holds an MBA from Warwick Business School.

She began her career in Exploration and is an experienced wellsite geologist. She held several technical and commercial leadership roles within energy and technology businesses, where she also gained expertise in business strategy, innovation and M&A.

Amanda’s interest in Sustainability and ESG has grown steadily over the years and in 2017 she joined energy transition start-up, Lir Resources and is currently CEO. Following the successful completion of Cambridge University’s Business Sustainability Management course in 2021, she set up her own Consultancy, Sussex Sustainability, offering advice and support to organisations wishing to drive up their business performance in ESG and sustainability.

Amanda is a Trustee on the Board of South Downs Leisure and a part time Visiting Lecturer at the University of Westminster, where she teaches sustainable supply chain management. She cares passionately about mental wellbeing and is an active Samaritans Listening Volunteer.

Alison Isherwood at sustain:able
Alison Location.png

Alison Isherwood (MEng)


Alison is determined to play her role in creating a more sustainable future, using her technical experience and analytical skillset alongside her more recently acquired sustainability insight.

She loves the concept of business with purpose, a key enabler of sustainability. This led her to join CausewayGT, a geothermal start-up focused on decarbonising industrial heat as well as working with sustain:able as an Associate, specializing in emission forecasting and accounting.

Alison has a MEng in Chemical Engineering and 24 years of experience working as a reservoir engineer and technical leader in oil and gas, both in the UK and overseas.

In 2020-2021 Alison completed a 9 month PGCert programme in Sustainable Business with the University of Cambridge, as well as her ISO-14064 GHG accounting & verification qualifications.

Alison is an enthusiastic mentor and volunteer, including chairing the London SPE Net Zero committee since 2020, which engages stakeholders across the energy industry and beyond on sustainability issues. 

For more details on our experience
and why we formed
sustain:able, click here

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