cordTech Hiring Rankings
UK's Fastest Growing Sustainability Companies
The UK's fastest growing Sustainability companies of Summer 2026 that are actively hiring engineers.
#
Company
Open jobs
Headcount
Growth
Calculated based on % headcount growth in the last 12 months.
1
Fuse
London, UK · Energy and UtilitiesSave with the cheapest electricity tariff in the UK
21 jobs
201 - 500
186%
2
StormHarvester
Belfast, UK · Machine Learning and AITHE LEADING PROVIDER OF AI ANALYTICS FOR WASTEWATER UTILITIES
3 jobs
51 - 200
53%
3
IONATE
London, UK · EnviroTechA revolution for grid-scale power flow control.
2 jobs
11 - 50
43%
4
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
35%
5
Pennon
Exeter, UK · Energy and UtilitiesResponsible, sustainable provision of essential utility services and environmental infrastructure
5 jobs
201 - 500
31%
6
Kraken Technologies
London, UK · EnviroTechDriving the global green energy revolution through transformational EnTech. Part of the Octopus Energy Group.
17 jobs
1001 - 5000
26%
7
HIVED
London, UK · LogisticsParcel delivery for the 21st century
5 jobs
201 - 500
23%
8
Kaluza
London, UK · EnviroTechThe intelligent software platform powering the future of energy.
6 jobs
501 - 1000
20%
9
SLR Consulting
Aylesbury, UK · ConsultancyGlobal Leaders in Sustainability Solutions
3 jobs
1001 - 5000
17%
10
Invinity Energy Systems
Liverpool, UK · Energy and UtilitiesUtility-grade energy storage. Safe, proven, economical vanadium flow batteries.
1 job
51 - 200
17%
11
Vital Energi
Blackburn, UK · Energy and UtilitiesCreative, collaborative, complete energy solutions for our future.
7 jobs
501 - 1000
16%
12
Better Cotton
London, UK · Non for Profit2 jobs
201 - 500
15%
13
Switch2
Shipley, UK · Energy and UtilitiesSmart & Sustainable Heat Network Solutions
5 jobs
51 - 200
14%
14
Zenobe
London, UK · Energy and UtilitiesDelivering clean power and transport solutions through the innovative use of battery storage.
5 jobs
201 - 500
13%
15
Ground Control
Billericay, UK · MaintenanceAward-winning external maintenance provider. National coverage all year round!
1 job
501 - 1000
12%
16
Recycleye
London, UK · Machine Learning and AITurning the world’s waste into resource
0 jobs
51 - 200
11%
17
Climate Policy Radar
London, UK · Machine Learning and AIBuilding the evidence base for evidence-based policymaking.
0 jobs
11 - 50
11%
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