The Irish Construction News Top 20 Mechanical and Electrical Contractors 2025 listing is a snapshot of the overall Irish M&E contracting sector at the end of 2024.

Mercury’s group turnover in 2024 was just over €1.8bn, up circa €200m on its 2023 figure of €1.6bn

No 01: Mercury

Total Turnover: €1.811BN

ROI Turnover: €472M

International Turnover: €1.339BN

Jones Engineering’s turnover in 2024 was €1.28bn, up circa €250m on its 2023 figure of €1.027bn

No 02: Jones Engineering

Total Turnover: €1.283BN

ROI Turnover: €629M

International Turnover: €654M

Kirby Group Engineering’s turnover in 2024 was €750m, an increase of circa €114m on its 2023 figure of €636.1M

No 03: Kirby Group Engineering

Total Turnover: €750M

ROI Turnover: €369M

International Turnover: €381M

Dornan Engineering’s turnover in 2024 was €734m, an increase of €145m on its 2023 figure of €589M

No 04: Dornan Group

Total Turnover: €589M

ROI Turnover: €130M

International Turnover: €459M

Suir Engineering’s turnover in 2024 was €401m, a decrease of €28m on its 2023 figure of €429.3m.

No 05: Suir Engineering

Total Turnover: €401M

ROI Turnover: €255M

International Turnover: €146M

Designer Group’s turnover in 2024 was €310m, the same as its turnover in 2023.

No 06: Designer Group

Total Turnover: €310M

ROI Turnover: €160M

International Turnover: €150M

STS Group’s turnover in 2024 was circa €298.5m, an increase of €3.5m on its 2023 figure of €295m.

No 07: STS Group

Total Turnover: €298.45M

ROI Turnover: €117,669,798

International Turnover: €180,780,202

King & Moffat Building Services’ turnover in 2024 was €167m, an increase of €43m on its 2023 figure of €123.64m.

No 08: King & Moffatt Building Services

Total Turnover: €167M

ROI Turnover: €55M

International Turnover: €112M

MSL Engineering’s turnover in 2024 was €115m, an increase of €13m on its 2023 figure of €102m.

No 09: MSL Engineering Ltd

Total Turnover: €115M

ROI Turnover: €108M

International Turnover: €7M

BMD & Company’s turnover in 2024 was €103.8m, an increase of €17m on its 2023 turnover of €86.8m.

No 10: BMD & Company Limited

Total Turnover: €86.8M

ROI Turnover: €86.8M

Radley Engineering’s turnover in 2024 was €100.8m, an decrease of €51.7m on its 2023 turnover of €152.6m.

No 11: Radley Engineering

Total Turnover: €100,853,757M

ROI Turnover: €100,853,757M

Leo Lynch’s turnover in 2024 was €84.7m, an increase of €9.5m on its 2023 turnover of €75.2m.

No 12: Leo Lynch

Total Turnover: €84.7M

ROI Turnover: €48.9M

International Turnover: €35.8M

Leo Lynch is a specialist mechanical and process engineering contractor.

CJK’s turnover in 2024 was €70m, an increase of €23.5m on its 2023 turnover of €46.5m.

No 13: CJK

Total Turnover: €70M

ROI Turnover: €70M

Lynskey Engineering’s turnover in 2024 was €57.9m, a decrease of circa €22m on its 2023 turnover of €72.976m.

No 14: Lynskey Engineering Ltd

Total Turnover: €57.9M

ROI Turnover: €47.5M

International Turnover: €10.4M

Tritech Engineering’s turnover in 2024 was €50.5m, an increase of €14m on its 2023 turnover of €36.5m.

No 15: Tritech Engineering

Total Turnover: €50.5M

ROI Turnover: €50.5M