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The Irish Construction News Top 20 Mechanical and Electrical Contractors 2024 listing is a snapshot of the overall Irish M&E contracting sector at the end of 2023.

Mercury

No 1: Mercury 

Total Turnover: €1.6BN

ROI Turnover: €343M

International Turnover: €1.257BN

Mercury is the European leader in construction solutions. It builds and manages engineering and construction projects for the world’s leading corporations.

No 2: Jones Engineering

Total Turnover: €1.027BN

ROI Turnover: €578M

International Turnover: €449M

Jones Engineering, headquartered in Dublin, is a global engineering contractor with extensive operations spanning Ireland, the UK, Europe, and the Middle East.

No 3: Kirby Group Engineering

Total Turnover: €636.1M

ROI Turnover: €401.9M

International Turnover: €234.2M

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 4: Dornan Group

Total Turnover: €589M

ROI Turnover: €130M

International Turnover: €459M

Dornan Group is a leading mechanical, electrical, and HVAC engineering and construction company renowned for its exceptional projects across various sectors in Europe.

Suir Engineering

No 5: Suir Engineering 

Total Turnover: €429.3M

ROI Turnover: €308.9M

International Turnover: €120.4M

As one of Ireland’s leading engineering services providers, Suir Engineering’s expertise focuses on four key sectors: pharmaceutical, food and beverage, energy, power & renewables and data centres.

Pipelife
Designer Group

No 6: Designer Group

Total Turnover: €310M (Estimated)

ROI Turnover: €130M (Estimated)

International Turnover: €180M (Estimated)

Founded in 1992, Designer Group, an Irish-owned electrical and mechanical company, has evolved from a local contractor to an international leader in engineering.

No 7: Specialist Technical Engineering Services (STS Group)

Total Turnover: €295M

ROI Turnover: €115,873,641

International Turnover: €179,126,359

STS Group continues to be one of Ireland’s leading electrical and instrumentation installation contractors, with over 1,600 employees working on some of the world’s most prestigious projects in the life sciences, data centre, transmission and distribution, and food and beverage sectors.

No 8: Radley Engineering

Total Turnover: €152.6M

ROI Turnover: €151.9M

International Turnover: €700,000

Founded in 1972, Radley Engineering is one of Ireland’s leading mechanical engineering companies.

Grant

No 9: King & Moffatt Building Services

Total Turnover: €123.64M

ROI Turnover: €53.29M

International Turnover: €70.35M

King & Moffatt Building Services is an award-winning international mechanical and electrical contractor with over 45 years of experience delivering excellence. The contractor has its own in-house MEP Design and BIM teams and a dedicated 40,000-sq foot offsite prefabrication facility.

No 10: MSL Engineering Ltd

Total Turnover: €102M

ROI Turnover: €97M

International Turnover: €5M

Founded in 1979, MSL Engineering Ltd is a full-service mechanical engineering contractor operating across a wide range of industry sectors.

No 11: BMD & Company Limited

Total Turnover: €86.8M

ROI Turnover: €86.8M

Founded in 1974, this year marks BMD & Company Limited’s 50th year in business as one of Ireland’s leading process mechanical engineering contractors.

Leo Lynch

No 12: Leo Lynch

Total Turnover: €75.2M

ROI Turnover: €65M

International Turnover: €10.2M

Leo Lynch is a specialist mechanical and process engineering contractor.

No 13: Lynskey Engineering Ltd

Total Turnover: €72,976,000

ROI Turnover: €36,978,000

International Turnover: €35,998,000

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.

CJK Engineering

No 14: CJK

Total Turnover: €46,502,840

ROI Turnover: €46,502,840

CJK 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 24 years and employs 350 people.

Dominic O Connor

No 15: Dominic O Connor

Total Turnover: €41,930,189

ROI Turnover: €41,930,189

Established in 1999, Dominic O’Connor Ltd has built a solid reputation for specialist commercial and industrial engineering services in the building industry.

Rockwell Engineering

No 16: Rockwell

Total Turnover: €40M

ROI Turnover: €40M

Tritech

No 17: Tritech Engineering

Total Turnover: €36.5M

ROI Turnover: €36.5M

No 18: Weltec Engineering

Total Turnover: €34,409,504

ROI Turnover: €34,409,504

T Bourke

No 19: T Bourke Ltd

Total Turnover: €22M

ROI Turnover: €22M

Mastertech

No 20: Mastertech

Total Turnover: €21,930,549

ROI Turnover: €21,930,549