The companies listed are primarily higher education institutions and healthcare providers based in Dublin. Notable entities include University College Dublin, a research-intensive university; Trinity College Dublin, recognized globally for academic excellence; and Dublin City University, which focuses on enterprise and innovation. Other significant organizations are Royal College of Surgeons in Ireland, a global university for healthcare education, and St James's Hospital Dublin, an academic teaching hospital.
A clear pattern among these companies is their strong focus on education and healthcare. Most are large, well-established organizations, with many founded before the 20th century, such as Trinity College Dublin (1592) and University College Dublin (1854), indicating a long-standing presence in the city's academic and medical sectors.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 |
University College Dublinucd.ie
Research-intensive university offering undergraduate, masters, PhD education, fostering innovation, global engagement, and diverse academic disciplines across multiple campuses. |
8,585 | |||
| 2 |
Trinity College Dublintcd.ie
Leading Irish university offering world-class education and research, recognized globally for academic excellence and high international rankings. |
7,268 | |||
| 3 |
Dublin City Universitydcu.ie
Leading university in Ireland with focus on enterprise and innovation Offers a wide range of degree programs and renowned research |
4,093 | |||
| 4 |
Royal College of Surgeons in Ireland (RCSI)rcsi.com
A global university dedicated to education and research in healthcare, ranking highly for promoting good health and gender equality |
2,934 | |||
| 5 |
St James's Hospital Dublinlinkin.bio
An academic teaching hospital delivering health treatment, care, and diagnosis while prioritizing education, research, and collaboration with a focus on quality and accountability |
2,788 | |||
| 6 |
Marcus Evans Groupmarcusevans.com
A global leader in business intelligence, offering diverse portfolios including summits, conferences, professional training, and market intelligence to help clients achieve strategic goals |
2,543 | |||
| 7 |
St. Vincent's University Hospitalstvincents.ie
A leading academic teaching hospital providing acute, chronic, and emergency care across 50 medical specialties with international accreditation and pioneering patient care approaches |
2,000 | |||
| 8 | 1,077 | ||||
| 9 |
SOLAS (An tSeirbhís Oideachais Leanúnaigh agus Scileanna)solas.ie
Leading authority in Ireland for funding, planning, and coordinating training programs, ensuring high-quality education for jobseekers and learners through partnerships with stakeholders |
987 | |||
| 10 |
Rehab Grouprehab.ie
Providing high-quality, flexible services empowering people with disabilities to achieve independence, confidence, skills, and meaningful community participation. |
844 | |||
| 11 |
Dublin Business Schooldbs.ie
Undergraduate, Postgraduate, Professional, Executive education programs provider. |
721 | |||
| 12 |
National College of Irelandncirl.ie
A Dublin-based educational institute specializing in business and computing, dedicated to changing lives through education |
684 | |||
| 13 |
Griffith College Dublingriffith.ie
Established in 1974, this institution offers a wide range of internationally recognized degree programs, professional training, and corporate educational solutions |
641 | |||
| 14 |
St Michael's Housesmh.ie
A Dublin-based organization offering services for individuals with intellectual disabilities and their families, impacting thousands through funded support programs |
638 | |||
| 15 |
Law Society of Irelandlawsociety.ie
The company is the regulatory body for solicitors in Ireland, promoting professional wellbeing, gender equality, diversity, and inclusion within the profession |
565 | |||
Want more companies than this list?This page shows the largest ones only. Connect to Tamtam to see every company that matches, filter by size, industry or growth, and reach their decision-makers. | |||||
| 16 |
Olive Groupolivegroup.io
A global workforce development company based in Dublin, offering high-quality eLearning solutions using VR, AI, and other technologies to transform businesses and lives |
564 | |||
| 17 | 493 | ||||
| 18 |
Dún Laoghaire Institute of Art, Design and Technologyiadt.ie
Leader in higher education specializing in developing future innovators in digital world through various programs Discover opportunities for your future today |
482 | |||
| 19 |
Hibernia Collegehiberniacollege.com
Blended learning college offering graduate, postgraduate, and professional programs in education with a focus on technology, professional development, and innovation |
416 | |||
| 20 |
National College of Art & Designncad.ie
Leading provider of art and design education in Ireland for over 250 years, offering undergraduate, graduate, and part-time programs across various disciplines |
412 | |||
| 21 |
Trinity Student Managed Fundtrinitysmf.com
The Trinity Student Managed Fund is the first student-managed fund in Ireland, providing real-life investment experience to Trinity students and supporting community organizations |
404 | |||
| 22 |
UCD Michael Smurfit Graduate Business Schoolsmurfitschool.ie
Offers world-class business education and research, holding triple accreditation, attracting high achievers globally, and preparing them for leadership roles in top organizations. |
393 | |||
| 23 |
Professional Developmentprofessionaldevelopment.ie
For over three decades, we have been offering practical courses in project management, lean six sigma, agile, communication, sales, and training design to enhance career potential |
372 | |||
| 24 |
City of Dublin ETBcityofdublin.etb.ie
The organization in Dublin offers a wide range of educational services including schools, further education, training, youth services, music programs, and financial aid |
339 | |||
| 25 |
HPCwearehpc.com
A people development company based in Dublin and Belfast, working with organizations to create high performance cultures through bespoke programs and services |
332 | |||
| 26 |
LearnUponlearnupon.com
It provides learner-centric tools and support to over 1,300 businesses, focusing on performance, retention, and growth through effective learning. |
326 | |||
| 27 |
UCD I&E Student Managed Funducdie.com
A real-life equity fund managed by students, aiming to bridge the gap between academic theory and industry practice, while donating profits to charity |
218 | |||
| 28 |
Institute of Public Administrationipa.ie
Dedicated to advancing public administration and policy through education, training, consultancy, and research services for public servants in Ireland and abroad |
196 | |||
| 29 |
Atlas Language Schoolatlaslanguageschool.com
Language school offering a variety of courses including exam preparation, executive English, teacher training, work placements, high school placement, and group programs |
190 | |||
| 30 |
Virtuosityvirtuosity.com
The company offers Virtuoso Subscriptions, providing businesses with Bentley applications, customizable training, and efficient technology integration to minimize project costs |
78 | |||
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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 Nov 11, 2026.
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