
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:

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
Bath
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Oil & Gas
Low
Carbon
Business
Strategy
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Energy Transition
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.
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Oil & Gas
Low
Carbon
Business
Strategy
Stakeholder Engagement
Transition Engineering
Emissions
ISO 14064

Dr Rosalie Constable
Cambridge
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. And in 2022 she completed ISO 14064-1 certification for Greenhouse Gas Emissions Accounting.
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
Manchester
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Oil & Gas
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Research
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Inclusion
Emissions
ISO 14064
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. In 2022, Gabby completed ISO 14064-1 certification for Greenhouse Gas Emissions Accounting.
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.
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Oil & Gas
Low
Carbon
Engineering
Energy
Transition
Sustainable Business
Emissions
ISO 14064

Alison Isherwood (MEng)
Cambridge
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.