# The 28 largest public sector organisations in Wales

Tamtam tracks 28 public sector organisations headquartered in Wales. This list ranks all of them by number of employees on LinkedIn, led by Cardiff and Vale University Health Board, Hywel Dda University Health Board and Prifysgol Cymru Y Drindod Dewi Sant / University of Wales Trinity Saint David. Their median headcount is 600. Half of them were founded in 2009 or later. The most common headquarters are Cardiff (10).

This selection of public sector organizations in Wales is dominated by healthcare and education providers. Notable entities include Cardiff and Vale University Health Board, a major healthcare provider in Cardiff, and Hywel Dda University Health Board, which serves West Wales. Prifysgol Cymru Y Drindod Dewi Sant / University of Wales Trinity Saint David is a long-established university. Transport for Wales manages rail services, and The Royal Mint produces coins and gifts. Most of these organizations are large public bodies serving broad community needs.

A clear pattern is the prevalence of health boards, indicating a strong public healthcare infrastructure. Many organizations, such as Public Health Wales and Digital Health and Care Wales, are headquartered in Cardiff, suggesting a concentration of administrative and strategic functions in the capital.

🇬🇧 Wales · 28 companies · Updated Nov 11, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [Cardiff and Vale University Health Board](https://www.tamtam.ai/c/cardiff-and-vale-university-health-board) (cavuhb.nhs.wales)<br>Healthcare provider offering a wide range of services to a local population of 500,000, with over 100 specialist services for the region and beyond | Hospitals and Health Care | 🇬🇧 Cardiff | 3,110 |  |
| 2 | [Hywel Dda University Health Board](https://www.tamtam.ai/c/hywel-dda-university-health-board) (hduhb.nhs.wales)<br>Healthcare provider in West Wales offering a range of services including acute, primary, community, mental health, and learning disabilities for the local population Contact for recruiting queries | Hospitals and Health Care | 🇬🇧 Carmarthen | 2,421 |  |
| 3 | [Prifysgol Cymru Y Drindod Dewi Sant / University of Wales Trinity Saint David](https://www.tamtam.ai/c/prifysgol-cymru-y-drindod-dewi-sant-university-of-wales-trinity-saint-david) (uwtsd.ac.uk)<br>A prestigious university in Wales, offering a dual-sector approach to education with a focus on benefiting learners, employers, and communities | Higher Education | 🇬🇧 Carmarthen | 1,960 | 1822 |
| 4 | [Cwm Taf Morgannwg University Health Board](https://www.tamtam.ai/c/cwm-taf-morgannwg-university-health-board) (ctmuhb.nhs.wales)<br>Provider of primary, secondary, and community health services to over 450,000 people in Wales, emphasizing respect, teamwork, and continuous improvement | Hospitals and Health Care | 🇬🇧 Abercynon | 1,882 |  |
| 5 | [Transport for Wales](https://www.tamtam.ai/c/transport-for-wales) (tfw.wales)<br>Management and operation of passenger rail services across Wales, focusing on improving connectivity, reliability, and customer experience. | Rail Transportation | 🇬🇧 Pontypridd | 1,870 |  |
| 6 | [Welsh Ambulance Services University NHS Trust](https://www.tamtam.ai/c/welsh-ambulance-services-university-nhs-trust) (ambulance.nhs.wales)<br>A Wales-based healthcare organization providing emergency medical services, telephone healthcare, advice, information via NHS 111 Wales, and non-emergency patient transport | Hospitals and Health Care | 🇬🇧 St Asaph | 1,677 |  |
| 7 | [Public Health Wales](https://www.tamtam.ai/c/public-health-wales) (publichealthwales.wales.nhs.uk)<br>A national NHS organization in Wales working to protect and improve health, reduce inequalities, and provide public health services and knowledge | Hospitals and Health Care | 🇬🇧 Cardiff | 1,298 | 2009 |
| 8 | [Cyfoeth Naturiol Cymru / Natural Resources Wales](https://www.tamtam.ai/c/cyfoeth-naturiol-cymru-natural-resources-wales) (naturalresources.wales)<br>Sustainable management and improvement of natural resources in Wales for current and future use | Environmental Services | 🇬🇧 Cardiff | 1,257 | 2013 |
| 9 | [Gower College Swansea](https://www.tamtam.ai/c/gower-college-swansea) (gcs.ac.uk)<br>A large further education college in Swansea offering a wide range of full-time and part-time courses, including A Levels, vocational subjects, higher education, and apprenticeships | Education | 🇬🇧 Swansea | 752 | 2010 |
| 10 | [Gwent Police](https://www.tamtam.ai/c/gwent-police) (gwent.police.uk)<br>Providing trusted, fair, and professional policing services to protect and reassure residents across multiple communities in Gwent area. | Public Safety | 🇬🇧 Cwmbrân | 745 | 1967 |
| 11 | [Digital Health and Care Wales](https://www.tamtam.ai/c/digital-health-and-care-wales) (dhcw.nhs.wales)<br>A national organization in Wales delivering digital health services to support doctors, nurses, and clinical professionals in providing specialist care | IT Services and IT Consulting | 🇬🇧 Cardiff | 739 | 2021 |
| 12 | [Coleg y Cymoedd](https://www.tamtam.ai/c/coleg-y-cymoedd) (linktr.ee)<br>Providing further education to over 9,000 learners across multiple sites in Caerphilly County and Rhondda Cynon Taff. | Higher Education | 🇬🇧 Cardiff | 663 | 2013 |
| 13 | [The Royal Mint](https://www.tamtam.ai/c/the-royal-mint) (royalmint.com)<br>Leading British maker of original coin collections, gifts, and currency solutions, offering eye-opening experiences, investment opportunities, and special moment celebrations | Consumer Goods | 🇬🇧 Llantrisant | 627 |  |
| 14 | [South Wales Fire and Rescue Service](https://www.tamtam.ai/c/south-wales-fire-and-rescue-service) (southwales-fire.gov.uk)<br>Collaborative fire and rescue team providing protection and safety for South Wales, focusing on innovation and excellence for future challenges. | Public Safety | 🇬🇧 Llantrisant | 600 | 1996 |
| 15 | [NHS Wales Shared Services Partnership](https://www.tamtam.ai/c/nhs-wales-shared-services-partnership) (nwssp.nhs.wales)<br>The company provides a comprehensive range of high-quality support functions and services for NHS Wales, emphasizing customer-focused assistance | Hospitals and Health Care | 🇬🇧 Cardiff | 540 | 2011 |
| 16 | [Heddlu Dyfed-Powys Police](https://www.tamtam.ai/c/heddlu-dyfed-powys-police) (dyfed-powys.police.uk)<br>A police service in Wales safeguarding residents and tourists in the counties of Carmarthenshire, Ceredigion, Pembrokeshire, and Powys | Law Enforcement | 🇬🇧 Carmarthen | 540 | 1968 |
| 17 | [Coleg Penybont \| Bridgend College](https://www.tamtam.ai/c/coleg-penybont-bridgend-college) (bridgend.ac.uk)<br>provides education and training for school leavers and mature students, recognized as a top inclusive and best workplace in UK | Education Administration Programs | 🇬🇧 Bridgend | 516 | 1923 |
| 18 | [Powys Teaching Health Board / Bwrdd Iechyd Addysgu Powys](https://www.tamtam.ai/c/powys-teaching-health-board-bwrdd-iechyd-addysgu-powys) (pthb.nhs.wales)<br>A healthcare organization in Wales, providing NHS services to residents of Powys county | Hospitals and Health Care | 🇬🇧 Bronllys | 516 | 1948 |
| 19 | [BCUHB Digital, Data and Technology](https://www.tamtam.ai/c/bcuhb-digital-data-and-technology) (bcuhb.nhs.wales)<br>Delivering innovative informatics services to clinicians and stakeholders, creating a virtual patient-focused environment for safe, high-quality care within the Health Board | Hospitals and Health Care | 🇬🇧 Bangor | 491 |  |
| 20 | [Careers Wales](https://www.tamtam.ai/c/careers-wales) (careerswales.gov.wales)<br>A Welsh Government-funded organization providing free careers information and support for individuals, as well as offering services for employers and educational partnerships | Information Services | 🇬🇧 Cardiff | 466 | 2013 |
| 21 | [Amgueddfa Cymru – Museum Wales](https://www.tamtam.ai/c/amgueddfa-cymru-museum-wales) (museum.wales)<br>A national museum organization in Wales, providing free access to museums showcasing local industries, treasures, and everyday life stories Join, volunteer, or donate to support | Museums, Historical Sites, and Zoos | 🇬🇧 Cardiff/Caerdydd | 440 | 1907 |
| 22 | [Grŵp Colegau NPTC Group of Colleges](https://www.tamtam.ai/c/grwp-colegau-nptc-group-of-colleges) (nptcgroup.ac.uk)<br>A leading education provider in Wales offering a wide range of full-time, part-time, and higher education courses across 9 sites #BeYourFuture | Education | 🇬🇧 Neath | 434 | 1931 |
| 23 | [Health Education and Improvement Wales (HEIW)/Addysg a Gwella Iechyd Cymru (AaGIC)](https://www.tamtam.ai/c/health-education-and-improvement-wales-heiw-addysg-a-gwella-iechyd-cymru-aagic) (heiw.nhs.wales)<br>A leading organization in NHS Wales, specializing in education, training, and development of healthcare workforce to ensure high-quality care for the people of Wales | Hospitals and Health Care | 🇬🇧 Nantgarw | 421 | 2018 |
| 24 | [North Wales Fire and Rescue Service](https://www.tamtam.ai/c/north-wales-fire-and-rescue-service) (northwalesfire.gov.wales)<br>A fire and rescue service in North Wales protecting over 678,000 residents, numerous tourists, and properties through 44 fire stations Employing nearly 1,000 staff | Public Safety | 🇬🇧 St Asaph | 330 |  |
| 25 | [Transport for Wales Rail/ Trafnidiaeth Cymru Gwasanaethau Trên](https://www.tamtam.ai/c/transport-for-wales-rail-trafnidiaeth-cymru-gwasanaethau-tren) (tfwrail.wales)<br>The company is dedicated to implementing the Welsh Government's vision of a high-quality, safe, integrated, affordable, and accessible transport network in Wales | Truck Transportation | 🇬🇧 Cardiff | 239 | 2018 |
| 26 | [Welsh Blood Service](https://www.tamtam.ai/c/welsh-blood-service) (welsh-blood.org.uk)<br>Organizes blood collection, testing, processing, and distribution to Welsh hospitals, relying on voluntary donors to maintain life-saving supplies | Hospitals and Health Care | 🇬🇧 Talbot Green | 222 |  |
| 27 | [Sport Wales](https://www.tamtam.ai/c/sport-wales) (sport.wales)<br>The national organization in Wales promotes sport and physical activity to improve health, build communities, develop skills, and support athletes | Spectator Sports | 🇬🇧 Cardiff | 202 |  |
| 28 | [Cardiff Bus](https://www.tamtam.ai/c/cardiff-bus) (cardiffbus.com)<br>Established in 1902, this company is the top bus operator in Cardiff, offering services within the city, Vale of Glamorgan, and to/from Newport | Truck Transportation | 🇬🇧 Cardiff | 196 |  |

## 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 Nov 11, 2026.

## More company lists in Wales

- [The largest companies in Wales](https://www.tamtam.ai/l/largest-companies-wales) (570)
- [Manufacturers in Wales](https://www.tamtam.ai/l/manufacturers-wales) (74)
- [Multinational companies in Wales](https://www.tamtam.ai/l/multinational-companies-wales) (69)
- [Retail chains in Wales](https://www.tamtam.ai/l/retail-chains-wales) (50)
- [Companies with in-house R&D in Wales](https://www.tamtam.ai/l/r-and-d-companies-wales) (38)
- [Family-owned companies in Wales](https://www.tamtam.ai/l/family-owned-companies-wales) (36)
- [Financial services firms in Wales](https://www.tamtam.ai/l/financial-services-firms-wales) (35)
- [Financial Services companies in Wales](https://www.tamtam.ai/l/financial-services-companies-wales) (35)
- [Hardware manufacturers in Wales](https://www.tamtam.ai/l/hardware-companies-wales) (32)
- [Food and Beverage Manufacturing companies in Wales](https://www.tamtam.ai/l/food-and-beverage-manufacturing-companies-wales) (29)
- [SaaS companies in Wales](https://www.tamtam.ai/l/saas-companies-wales) (29)
- [Retail companies in Wales](https://www.tamtam.ai/l/retail-companies-wales) (28)
- [Contract manufacturers in Wales](https://www.tamtam.ai/l/contract-manufacturers-wales) (26)
- [Food and beverage companies in Wales](https://www.tamtam.ai/l/food-and-beverage-companies-wales) (26)
- [Hotel and hospitality groups in Wales](https://www.tamtam.ai/l/hospitality-groups-wales) (26)

## The same list elsewhere in United Kingdom

- [Public sector organisations in the United Kingdom](https://www.tamtam.ai/l/public-sector-organisations-united-kingdom) (801)
- [Public sector organisations in England](https://www.tamtam.ai/l/public-sector-organisations-england) (638)
- [Public sector organisations in Scotland](https://www.tamtam.ai/l/public-sector-organisations-scotland) (67)
- [Public sector organisations in London](https://www.tamtam.ai/l/public-sector-organisations-london) (127)

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Source: https://www.tamtam.ai/l/public-sector-organisations-wales