The Irish Construction News Top 20 Mechanical and Electrical Contractors 2023 listing is a snapshot of the overall Irish M &E specialist services sector at the end of 2022.
No 2: Jones Engineering
Total Turnover: €1.083BN
ROI Turnover: €663M
International Turnover: €420M
Jones Engineering is a global engineering contractor headquartered in Dublin with operations throughout Ireland, the UK, Europe and the Middle East.
No 3: Dornan Group
Total Turnover: €468M
ROI Turnover: €150M
International Turnover: €318M
Dornan Group is a leading mechanical, electrical, and HVAC engineering and construction company renowned for its exceptional projects across various sectors in Europe.
No 4: Kirby Group Engineering
Total Turnover: €454,100,000
ROI Turnover: €269,300,000
International Turnover: €184,800,000
Kirby Group Engineering is a privately owned Irish firm with an enduring reputation for delivering world-class projects and real value for its clients.
No 5: Suir Engineering
Total Turnover: €313M
ROI Turnover: €212M
International Turnover: €71M
Suir Engineering is a European contractor with nearly 40 years of experience delivering mechanical, electrical and instrumentation (M, E&I) services. It is a leader in its fields in Europe, employing 1,500 direct employees and an expected turnover of over €400m in 2023.
No 6: Designer Group
Total Turnover: €220M
ROI Turnover: €120M
International Turnover: €100M
Founded in 1992, Designer Group is now a leading innovative and sustainable provider of mechanical, electrical and instrumentation engineering solutions. The business provides trusted MEP expertise for clients on an international scale, across Ireland, the UK, Europe, Africa and North America, with a client base spread over 14 sectors, including data centres and life sciences.
No 6: Specialist Technical Engineering Services (STS Group)
Total Turnover: €220M
ROI Turnover: €73M
International Turnover: €147M
Specialising in electrical, instrumentation and commissioning services, STS Group has been on an impressive growth trajectory of late. Having made substantial investments locally and internationally across its two main areas of focus – life sciences/pharma and data centres – the firm now has 1,600-plus personnel delivering some of the most challenging and prestigious projects with world-renowned brands.
No 8: King & Moffatt Building Services
Total Turnover: €155M
ROI Turnover: €48M
International Turnover: €107M
King & Moffatt Building Services is an award-winning mechanical and electrical contractor with over 400 directly-employed personnel. It has over 45 years of experience in the building services industry and an annual group turnover of over €155m.
No 9: Radley Engineering
Total Turnover: €86,955,871
ROI Turnover: €84,767,599
International Turnover: €2,188,272
Founded in 1972, Radley Engineering celebrated 50 years in business last year as one of Ireland’s leading mechanical engineering companies.
No 10: MSL Engineering Ltd
Total Turnover: €77M
ROI Turnover: €69M
International Turnover: €8M
MSL Engineering Ltd is a full-service mechanical engineering contractor operating across a wide range of industry sectors.
No 11: BMD & Co Limited
Total Turnover: €68.1M
ROI Turnover: €68.1M
With almost 50 years as one of Ireland’s leading mechanical engineering companies, BMD & Company Limited (BMD) has a track record of delivering projects across a wide range of industries, including life sciences, semiconductors and chemicals.
No 12: CJK Engineering
Total Turnover: €62,105,417
ROI Turnover: €62,105,417
CJK Engineering is an Irish-owned mechanical and electrical services contractor established in 1998. Based in Dublin, the company has steadily expanded its operations over the past 25 years and employs 350 people.
No 13: Lynskey Engineering
Total Turnover: €54.1M
ROI Turnover: €29,830,000
International Turnover: €24,270,000
Lynskey Engineering Ltd, founded in 1964, is one of Ireland’s leading mechanical engineering contractors. It has a reputation for quality installations delivered on time and within budget.
No 14: Leo Lynch Group
Total Turnover: €48M
ROI Turnover: €48M
Leo Lynch was established in 1956 and is one of Ireland’s leading mechanical and process-mechanical engineering contractors.

No 15: Tritech Engineering
Total Turnover: €39.5M
ROI Turnover: €39.5M
Tritech is a mechanical, electrical and maintenance contractor that was founded in 1999.

No 16: Buttimer Engineering
Total Turnover: €30,785,702
ROI Turnover: €13,940,756
International Turnover: €16,844,946

No 17: Weltec Engineering
Total Turnover: €30,001,373
ROI Turnover: €30,001,373

No 18: Rockwell Engineering
Total Turnover: €24.7M
ROI Turnover: €24.7M
