1. Kingspan

Kingspan manufactures insulation and building envelope solutions for the construction industry. It is based in Ireland but has operations in western and eastern Europe, the United States, India, Australasia and the Middle East.

2. Actavo Group Ltd

Actavo is an international engineering solutions company operating in 100+ locations. Sectors in which Actavo specialises include power generation, marine, petrochemical, nuclear, home energy, satellite and telecommunications, education, healthcare, events services, civ...

3. Lagan Group

The Lagan Construction Group has a heritage spanning over 50 years and counts as a major force in international construction and infrastructure schemes both in the domestic building and civil engineering markets. Specialist teams within the Lagan Group work across sect...

4. McLaughlin & Harvey

McLaughlin & Harvey is a building and civil engineering construction company. The company provides services from the design and construction stage of development right through to civil engineering and facilities management. Divisions of the company include constructio...

5. JJ Rhatigan

JJ Rhatigan & Company is a construction company, with offices in Galway, Dublin, Cork, Sligo and London. The company's portfolio extends from small scale building extensions, redesign and renovations to mixed use developments ranging in value from €1 million to €20 mill...

6. Abbey

Abbey plc is quoted on the ESM in Dublin, and the AIM Market in London. The company’s main activities are residential housing development in the United Kingdom, Ireland and Prague. It also has a plant hire division, M&J Engineers Ltd., based in the United Kingdom.

7. Noonan Services

The Noonan Services Group operates across Ireland and the UK, providing a range of outsourced facility services including security, cleaning, pest management and landscaping services to corporate clients. It's head office is in Swords, Dublin but it also has offices ...

8. P. J. Hegarty

P.J. Hegarty & Sons is a building and civil engineering company established in Ireland in 1925. The Company undertakes projects throughout Ireland from offices in Dublin, Cork and Limerick, and has been associated with many of the country's major developments in the com...

9. Kirby Group Engineering

Kirby Group is an international multi-disciplinary engineering services contractor which provides six core services; electrical, mechanical, controls & instrumentation, power, data technologies, and design & engineering. Its clients include Pfizer, Shell, Vodafone, B...

10. Cairn Homes

Cairn builds new homes.

11. Doyle Hotels

The Doyle hotel group consists of eight luxury hotels in five cities in Ireland, the UK and US. Irish properties in the portfolio include The Westbury and The Croke Park Hotels in Dublin and the River Lee Hotel in Cork. There are three hotels in London, one in Brist...

12. Commidare Holdings

The primary businesses of Commidare Holdings Limited are in retailing and the operation of hotels. Located in the South West of Ireland, its related Garvey Group operates a number of businesses in the food retailing, leisure and hospitality industry include Benner's...

13. Omniplex

Omniplex, owned by the Anderson family, operates 20 cinemas on the island of Ireland, as well as some of the retail parks those cinemas are located on. The group also owns The Swan Shopping Centre in Rathmines and The Academy building on Pearse St. Historically it was...

14. E & I Engineering Ireland

E&I Engineering provides switchgear, power distribution solutions and energy management systems throughout Ireland, the UK and mainland Europe. Its team of chartered engineers manages every aspect of a project from concept design with consultants, manufacture, delivery,...

15. Ardmac

Ardmac is an interior construction company aimed at the commercial, retail, biopharma and healthcare sectors. The company operates throughout the UK and Ireland and specialises in cleanrooms, commerical fit outs and retail fit outs.

16. Mac-Interiors

Mac-Interiors specialises in commercial real estate refurbishment; construction management; main contracting; design/build; and office fit out.

17. SIG Trading (Ireland) Ltd

SIG Ireland is a subsidiary of SIG plc (www.sigplc.co.uk, FTSE 250), an international multi-site distributor of specialist construction related products, with a number of divisions operating in Insulation, Roofing, Interiors and Specialist Construction Products. In ...

18. Flynn Management & Contractors Limited

Flynn Management & Contractors is a construction solutions provider to the commercial, retail, leisure/ hospitality, life science, healthcare and industrial/infrastructure sectors.

19. ISS

ISS (Integrated Service Solutions) provides facility management services including security, cleaning, catering, property services, washroom services and pest control. The company has more than 3,000 employees in Ireland and provides full national coverage from its six...

20. Munster Joinery

Munster Joinery is one of the largest manufacturers of energy efficient windows and doors in Europe. Founded in 1973, the company has a wide range of products from uPVC to timber to AluClad and aluminium, all of which are manufactured in Ireland.