1. Apple Ireland

Apple designs and creates iPods and iTunes, Mac laptops and desktop computers, the OS X operating system, and the iPhone. The company first established operations in Ireland in 1980. The company is based in Cork and currently employs over 5,000 people as a result of a...

2. Microsoft

Microsoft Ireland Operations Ltd is a subsidiary of the software giant Microsoft which sells, distributes and markets software globally from Dublin. Microsoft, the world’s biggest software company, established an Irish manufacturing facility in 1985 and now employs ...

3. Facebook

Founded in 2004, Facebook is a social utility that connects people with friends and others who work, study and live around them. People use Facebook to stay connected with friends and family, to discover what’s going on in the world, and to share and express what matter...

4. Dell Ireland

Since 1984, Dell has been an end-to-end computing solutions company. With more than 100,000 team members across the globe, Dell serves customers ranging from the world's largest businesses and public-sector organisations, to small and medium businesses, and individual c...

5. Oracle

The principal activity of Oracle EMEA Ltd is the manufacture and sale of computer software in the European market, together with the provision of associated translation, finance and marketing services. Oracle Corporation, incorporated in 2005, is an enterprise softw...

6. Sandisk

Sandisk provides various flash memory storage, the data storage technology included in memory sticks, smartphones, tablets and mp3 players. The company claims that approximately 250,000 retail outlets offer SanDisk products to consumers globally and ships more than two ...

7. Kingston

Kingston Technology International Ltd is a manufacturer of memory products such as USB drives. It markets over 2000 memory products and supports more than 6000 systems. It is a privately owned company with headquarters based in Fountain Valley, California and with s...

8. VMware

VMware International sells, markets and provides support for VMware software products sold outside the US. Its US parent is software company VMware which provides virtualisation solutions to separate the operating system and application software from the underlying hard...

9. Intel Ireland

Intel Ireland's Leixlip campus began operations in 1989. Since then, the multinational microchip manufacturer has invested over €6 billion in developing this base. It employs over 5,000 people at its Irish subsidiary.

10. Maxim Integrated Products

Maxim Integrated Products makes integrated analog and mixed-signal semiconductors. The company supplied a broad range of linear and mixed signal integrated products, commonly referred to as analog circuits. In May 2010, the company opened its offices in Clonskeagh, D...

11. Microchip Technology

Microchip Technology Ireland Limited operates as a subsidiary of Microchip Technology Inc. Microchip Technology Inc. (NASDAQ: MCHP) is a leading provider of microcontroller, analog and Flash-IP solutions. The company is headquartered in Chandler, Arizona.

12. Eircom

Eir (previously known as eircom) is the principal provider of fixed-line telecommunications services in Ireland with approximately 2.6 million fixed-line telephone access channels in service. The company's mobile division includes Meteor and emobile. In March 2016, Eir...

13. Sandvik

Sandvik Mining & Construction Logistics is a high-technology, Swedish engineering group. It has representation in more than 130 countries. The company does business in three main areas - it manufactures tools for metal cutting in cemented carbide and high-speed stee...

14. NCR

NCR Corporation is a global technology company with self-service solutions for ATM machines and software, POS and Retail systems and airline check-in systems. NCR Global Solutions is wholly owned by the NCR Corporation and supports the management, development, and g...

15. HP Ireland

Hewlett Packard in Ireland runs nine different businesses with over 4,000 employees in the areas of manufacturing, research and development, customer software support, marketing, and sales and services. The main site for HP in Ireland is located in Leixlip, Co Kildare, ...

16. SAP Business Objects

The business software supplier has offices in over 120 countries, over 55,000 employees, and revenues in excess of €12billion. It employs over 1,200 people across three sites in Dublin and Galway. The Dublin organisation focuses on the provision of Global Support, R...

17. Netgear International

Netgear designs networking, storage and security technology solutions for small- to medium-sized businesses and home users. The company's headquarters are in San Jose, California, with additional offices in 25 countries. Its international headquarters are based in Cork.

18. IBM

IBM is a provider of advanced information technology, products, services and business consulting expertise. IBM in Ireland is made up of a diverse workforce of over 3,000 employees working across a broad range of businesses and locations including: IBM Ireland, which...

19. CarTrawler

CarTrawler connects business and leisure customers and online travel retailers with road and rail transport solutions. Over 80 international airlines and 2,000 travel retailers around the world trust CarTrawler to provide their customers with real-time access to over 1,...

20. Commscope

Commscope EMea Ltd is a subsidiary of the global cable provider Commscope. The company makes physical cables connecting telephones, work stations, local area networks (lan's) and other communication devices. in January 2011 Commscope was purchased by the Carlylse Grou...