cordTech Hiring Rankings
UK's Most Popular Sustainability Companies
The UK's most popular Sustainability companies of Summer 2026 that are actively hiring engineers.
#
Company
Open jobs
Headcount
Overall popularity
Calculated based on total number of applications received compared with all companies in Summer ’26.
1
Heat Geek
London, UK · Energy and UtilitiesEmpowering people to revolutionise home energy at nation scale
2 jobs
11 - 50
Top 24%
2
Neutreeno
Cambridge, UK · SustainabilityPioneered by scientists at the University of Cambridge, Neutreeno’s revolutionary software is transforming value chain decarbonisation, helping companies hit their Scope 3 targets.
4 jobs
11 - 50
Top 26%
3
Green Britain Group
Stroud, UK · Energy and UtilitiesOur mission is to bring about a Green Britain.
8 jobs
11 - 50
Top 30%
4
Climate Policy Radar
London, UK · Machine Learning and AIBuilding the evidence base for evidence-based policymaking.
0 jobs
11 - 50
Top 57%
5
Gigaton
London, UK · Machine Learning and AI(formerly Carbon Re) Building industrial AI at scale
1 job
11 - 50
Top 72%
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