_One of First Momentum's portfolio companies (Imperial alumni, £2M raised) is looking for a Founding Scientist in London to lead the chemistry program and help release geothermal energy worldwide:
_
Deep tech startup unlocking stranded geothermal energy and critical minerals
London (on-site) | Full-time | £50–70k salary + founding equity
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Our Mission
Drilling advances are unlocking access worldwide to the Earth’s inner heat, creating the possibility for clean 24/7 power at civilisational scale. But reaching the heat is just the first step. The geothermal industry is still constrained by the chemistry of the fluids it brings to the surface. Today, plant operators are forced to reinject brines early to protect infrastructure from severe silica scaling, leaving usable energy and dissolved critical minerals out of reach. We raised £2 million to develop a silica removal retrofit module to boost geothermal power generation and create cleaner brines for co-production of energy and critical minerals from the same wells.
Bring your talent to help create a new category of geothermal operations, built not just to survive brine chemistry but to master it.
Your Role
As the Founding Scientist, you will lead the chemistry programme from day one. Your mission will be to develop a recoverable process that selectively removes silica from hot geothermal brines, forming the scientific foundation for our first product and IP. You will work directly alongside the founder CEO and a process engineer to translate your results into continuous-flow prototypes and, ultimately, a pilot skid to be deployed at real power plants across Europe. Beyond developing the chemistry, you will generate data to secure pilot customers, de-risk the transition from lab to field, and join team trips to collect and test samples under live geothermal conditions.
This is a founding role: we want someone who can work independently within a very small team, move fast under uncertainty, and prioritise viable outcomes that bring us closer to real-world operations over perfect experiments.
Who we are looking for
An ambitious scientist whose technical rigour is matched by the drive to turn lab results into commercial technology. Someone excited to build a company from its earliest days, work at the frontier of geothermal operations, and help reshape how clean energy and critical minerals are produced worldwide. Ideally, you have:
Why join us
Are you an exceptional scientist ready to build this company from the ground up?
Further details will be shared with shortlisted candidates under appropriate confidentiality.
As a first investor, we help founders and startups achieve breakthrough success with their tech ventures.
Founding Scientist • London, England, United Kingdom
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