| # | Company | Employees |
|---|---|---|
| 1 | 12,865 | |
| 2 |
Aggrekoaggreko.com
Global leader providing temporary power, temperature control, and energy solutions through innovative, modular technology for individuals seeking fulfilling careers in a diverse environment |
8,953 |
| 3 |
ScottishPowerscottishpower.com
Leading renewable energy generation, managing electricity grids, and supporting homes and businesses in transitioning to a low carbon future. |
5,295 |
| 4 |
KCA Deutagkcadeutag.com
Oilfield services company merged with Helmerich Payne, expanding global footprint, service capabilities, and technology offerings in energy sector. |
4,862 |
| 5 |
EnerMechenermech.com
Global provider of integrated mechanical, electrical, instrumentation, and integrity solutions for energy and infrastructure sectors, delivering world-class services across full asset lifecycle worldwide |
2,882 |
| 6 |
SSEN Transmissionssen-transmission.co.uk
Developing and operating a vast network to transport renewable energy across challenging terrains, supporting net zero emissions targets. |
2,074 |
| 7 |
SSE Renewablessserenewables.com
Development and operation of onshore and offshore wind farms, hydro power, and pumped storage to produce renewable electricity. |
1,984 |
| 8 |
SP Energy Networksspenergynetworks.co.uk
Connects and distributes electricity to 3.5 million UK homes and businesses, maintaining network infrastructure and connecting renewable energy sources across various regions. |
1,952 |
| 9 |
Doosan Babcockaltradbabcock.com
Specialist in construction, aftermarket, and upgrade services for thermal power, nuclear, oil, gas, petrochemical, and process sectors worldwide. |
1,758 |
| 10 |
Stena Drillingstena-drilling.com
Global independent drilling contractor with a fleet of well-maintained drillships and semi-submersible rigs, known for innovation, safety, and operational excellence |
1,677 |
| 11 | 1,602 | |
| 12 |
Scottish and Southern Electricity Networksssen.co.uk
The company maintains electricity networks serving over 39 million homes and businesses in central southern England and northern Scotland, prioritizing safety and reliability |
1,473 |
| 13 |
Trillium Flow Technologiestrilliumflow.com
A provider of mission critical valves, pumps, and services for various industries, focusing on delivering innovative products and customer-centric support |
1,428 |
| 14 |
North Starnorth-star.co.uk
A company focused on employee safety and care, dedicated to delivering high-quality services through teamwork and collaboration |
1,416 |
| 15 |
The Midcounties Co-operativemidcounties.coop
A large independent co-operative in the UK with over 6,000 colleagues, operating in various regions, offering benefits, and emphasizing values like democracy and social responsibility |
1,407 |
| 16 |
Sparrows Groupaltradsparrows.com
Global provider of specialist lifting, mechanical handling, cable laying, and fluid power solutions for energy and industrial sectors worldwide. |
1,335 |
| 17 |
Proservproserv.com
Specializing in energy technology solutions, our company offers innovative, flexible, and environmentally-friendly controls, monitoring, intelligence, and optimization services for the energy sector |
1,305 |
| 18 |
Score Groupscore-group.com
Provides advanced engineering technology services in valve and emissions management, gas turbines, surface technologies, energy, defence, and aerospace. |
1,229 |
| 19 |
SMSsmsenergy.com
providing integrated energy infrastructure including smart meters, battery storage, and EV chargepoints to decarbonise and optimize energy use |
1,227 |
| 20 |
CRC Evanscrcevans.com
CRC Evans offers welding and coating services, technologies, and solutions for the energy and infrastructure industries on a global scale |
1,066 |
| 21 |
Bilfinger Salamis UKbilfinger.com
A leading industrial services provider in Europe, specializing in operations and maintenance support for energy majors, offering integrated solutions and innovative maintenance methods |
1,024 |
| 22 |
Altera Infrastructurealterainfra.com
A leading global energy infrastructure services group with a focus on owning and operating critical assets in offshore oil regions |
990 |
| 23 |
Cairn Energy PLCcairnenergy.com
Independent oil and gas exploration and production company, discovering and developing reserves globally, with focus on West Africa, North Atlantic, and North Sea assets. |
988 |
| 24 |
EnQuestenquest.com
An independent oil and gas company focused on developing and producing oil fields, with a strong presence in the UK North Sea and other basins |
887 |
| 25 |
Dolphin Drillingdolphindrilling.com
A leading harsh environment drilling contractor, partnering to lower costs, increase uptime, and deliver wells efficiently and effectively in the offshore oil and gas industry |
810 |
| 26 |
Ithaca Energyithacaenergy.com
A leading oil and gas operator in the UK, committed to meeting energy needs sustainably while maximizing value through responsible production |
781 |
| 27 |
UTECacteon.com
Provides comprehensive marine environment data and insights to optimize project designs, save time, and maximize economic value throughout asset life. |
764 |
| 28 |
NEO NEXT+ Energyneweuropeanoffshore.com
Independent North Sea operator focusing on value creation with high ESG standards, sustainable assets, organic production growth, asset life extensions, and acquisitions |
713 |
| 29 |
Last Milelastmile.co.uk
Designing, building, and operating essential utilities infrastructure in Great Britain to provide access to heat, power, water, and wastewater services every day |
689 |
| 30 |
BSW Groupthebswgroup.co.uk
Largest UK forestry business with divisions in nurseries, management, sawmilling, timber manufacturing, and energy, part of binderholz group. |
677 |
| 31 |
INEOS Grangemouthineos.com
An industrial site in Grangemouth with a crude oil refinery, petrochemical plants, and extensive infrastructure offering diverse career opportunities in engineering |
639 |
| 32 |
Globalgegroup.com
Leading service and contracting company for construction, maintenance, and enhancement solutions across energy industry sectors, including renewables, oil & gas, water, and nuclear. |
638 |
| 33 |
Axisaxis-wt.com
An independent consultancy based in Aberdeen, providing specialist expertise in Exploration and Production, Decommissioning, and Low Carbon solutions to the global energy industry |
583 |
| 34 |
Boskalis Subsea Servicesboskalis.com
Specializing in subsea solutions for the offshore energy industry, offering integrated services such as project management, engineering, construction, inspection, and maintenance |
579 |
| 35 |
THREE60 ENERGYthree60energy.com
A prominent energy services group providing asset management, engineering technology, and energy transition solutions across various industries worldwide |
576 |
| 36 |
SES Energyswirees.com
Global energy industry support provider offering offshore containers and services, wind services, aviation services, and smart connected solutions with a focus on customer ease |
516 |
| 37 |
Ashtead Technologyashtead-technology.com
A global leader in equipment rental solutions and advanced underwater technologies for the energy sector, with over 38 years of experience |
426 |
| 38 | 349 | |
| 39 |
Aurora Energy Servicesauroraenergy.co
An international energy services company with expertise in oil & gas, renewable energy, asset lifecycle maximization, training, and safety solutions |
306 |
| 40 |
IKM Testing UKikm.com
A leading service provider in the energy sector, specializing in pipeline, process, well services, and renewables with a strong focus on safety, quality, and efficiency |
227 |
| 41 |
Glacier Energyglacierenergy.com
Specialist provider of products, services, and solutions for both renewable and conventional energy markets, optimizing assets for peak performance |
215 |
| 42 |
Wood Group - clean energywoodgroup.com
Global provider of engineering and technical advisory services for renewable energy projects worldwide, with a focus on clean energy and grid integration |
159 |
| 43 |
TSG UKtsg-solutions.com
Specializing in multi-energy distribution solutions, the company provides equipment and services to forecourts, fleets, and the transport industry, focusing on sustainable fuelling solutions |
121 |
| 44 |
ALVANCE British Aluminiumalvancebritishaluminium.com
Aluminium smelting powered by hydropower, producing environmentally friendly metal for packaging, vehicles, transportation, and engineered products. |
107 |
| 45 |
Envevo Ltdenvevo.co.uk
Independent Connections Provider, offering an alternative to UK DNO market, and an EV specialist providing full turnkey solutions for EV charging projects. |
106 |
| 46 |
Petrex Energy Services Limitedpetrex.co.uk
Provides innovative engineering solutions for the energy sector by offering design, field development services, and experienced in-house resources for project delivery |
85 |
| 47 |
Centurion - UK & Europe Regioncenturionukrs.com
Provider of efficient and safety-driven rentals, sales, and services for critical industries worldwide, offering tailored packages through diverse capabilities and expertise |
76 |
| 48 |
Renewco Powerrenewcopower.com
Renewco Power specializes in developing large-scale solar, wind, storage, and green hydrogen projects in Europe and the US Led by experienced executives |
46 |
| 49 |
Bumblebee | EV Chargingbumblebeeev.com
Providing guidance and support for installing chargepoints in homes and businesses, including advice on grant options and selecting the right equipment |
42 |
| 50 |
FOR EVforev.co.uk
Developing a network of 1800 EV charge-points in Scotland to support decarbonization of transportation and benefit all stakeholders |
26 |
| 51 |
Connekt EV Chargingconnektcharging.com
Electric vehicle charging solution provider in Scotland, aiming to facilitate the EV revolution by offering workplace and destination charging integrated with excellent customer service |
25 |
| 52 |
GreenPower Developments Ltd.greenpowerinternational.com
Leading independent renewable energy developer specializing in wind turbines, solar, and hydroelectric projects, from single installations to utility-scale assets |
22 |
| 53 |
The Linell Grouplinellgroup.co.uk
Provider of engineering solutions for oil & gas, marine, renewables sectors Design, procure, and supply for clients worldwide, maintaining excellence and prioritizing safety and quality |
18 |
| 54 |
Ecolivingecolivinguk.com
Specialist provider of renewable energy solutions, offering design, installation, and maintenance services, focusing on maximizing energy savings and sustainability for clients |
13 |
| 55 |
Moray Eastmorayoffshore.com
A joint venture developing a 950 MW offshore wind project in Scotland, aiming to provide electricity to 950,000 UK homes and 40% of Scotland's electricity needs |
13 |
| 56 |
Shire Energy Servicesshire-energy.co.uk
This company provides innovative energy solutions to help clients manage their energy consumption and reduce their carbon footprint through engagement, installation, and aftercare services |
11 |
| 57 |
Global (Careers)glo-bal.com
A leading service and contracting company in the energy industry, offering construction, maintenance, and enhancement solutions with a focus on renewables and sustainability |
11 |
| 58 |
Innovatus Technologies Ltdinnovatustech.co.uk
Design and manufacture high pressure lightweight hydrogen storage tanks for industries utilizing hydrogen as an alternative energy source, aiding in decarbonizing key sectors |
1 |
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How this list is built
Every company on this list has a Tamtam company profile. The industry is the one the company gives on LinkedIn; categories such as SaaS or fintech are classified by Tamtam's AI from the company's website and LinkedIn page; and the headquarters city must match the company's own address. Companies are ranked by the number of employees on LinkedIn, and the list is refreshed every night. Classifications can be wrong, so treat the list as a starting point rather than an official ranking. Last updated Oct 24, 2026.
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- Manufacturers in Scotland 61
- Oil and Gas companies in Scotland 60
- Food and Beverage Manufacturing companies in Scotland 57
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- Non-profit Organizations companies in Scotland 37
- E-commerce companies in Scotland 36