The Irish Construction News Top 20 Mechanical and Electrical Contractors 2026 listing is a snapshot of the overall Irish M&E contracting sector at the end of 2025.

No 01: Mercury Engineering

Mercury’s group turnover in 2025 was €1.96bn  up circa €160m on its 2024 turnover of €1.8bn

Total Turnover: €1,956,000,000

ROI Turnover: €191,000,000

International Turnover: €1,765,000,000

No 02: Jones Engineering

Jones Engineering’s turnover in 2025 was over €1.6bn,  up circa €320m on its 2024 turnover of €1.28bn,

Total Turnover: €1,603,000,000

ROI Turnover: €589,000,000

International Turnover: €1,014,000,000

No 03: Dornan Group

Dornan Group’s turnover in 2025 was €1.2bn, an increase of circa €466m on its 2024 turnover of €734m

Total Turnover: €1,214,000,000

ROI Turnover: €95,000,000

International Turnover: €1,119,000,000

No 04: Kirby Group Engineering

Kirby Group Engineering’s turnover in 2025 was €933m, an increase of  €183m on its 2024 turnover of €750m

Total Turnover: €933M

ROI Turnover: €397M

International Turnover: €536M

No 05: Suir Engineering

Suir Engineering’s turnover in 2025 was circa €421m, an increase of €20m on its 2024 turnover of €401m.

Total Turnover: €421,350,000

ROI Turnover: €251,780,000

International Turnover: €169,570,000

No 06: STS Group

STS Group’s turnover in 2025 was circa €358m , an increase of circa €59m on its 2024 figure of €299m

Total Turnover: €357,500,000

ROI Turnover: €125,188,000

International Turnover: €232,312,000

No 07: Designer Group

Designer Group’s turnover in 2025 was €275m, a decrease of €35m on its turnover of €310m in 2024

Total Turnover: €275,000,000

ROI Turnover: €170,000,000

International Turnover: €105,000,000

No 08: King & Moffatt Building Services

King & Moffat Building Services’ turnover in 2025 was €194m,  an increase of €27m on its 2024 figure of €167m,

Total Turnover: €194,000,000

ROI Turnover: €62,000,000

International Turnover: €132,000,000

No 09: Leo Lynch

Leo Lynch’s turnover in 2025 was over €110.3m, an increase of €25.6m on its 2024 turnover of €84.7m.

Total Turnover: €110,300,000

ROI Turnover: €64,200,000

International Turnover: €46,100,000

No 10: CJK

CJK’s turnover in 2025 was €97.6m, an increase of €27.6m from its 2024 turnover of €70m.

Total Turnover: €97,548,000

ROI Turnover: €97,548,000

Radley Engineering’s turnover in 2025 was €94.4m, a decrease of €5.6m on its 2024 turnover of €100.8m.

No 11: Radley Engineering

Total Turnover: €94,425,992

ROI Turnover: €94,425,992

No 12: MSL Engineering Ltd

MSL Engineering’s turnover in 2025 was €93m, a decrease of €22m from its 2024 turnover of €115m.

Total Turnover: €93M

ROI Turnover: €50M

International Turnover: €43M

No 13: Tritech Engineering

Tritech Engineering’s turnover of € €71.5m in 2025 was an increase of €21m from its 2024 turnover of €50.5m,

Total Turnover: €71.5M

ROI Turnover: €71.5M

No 14: Lynskey Engineering Ltd

Lynskey Engineering’s turnover in 2025 was €70.1m, an increase of circa €12.2m from its 2024 turnover of €57.9m.

Total Turnover: €70,067,589

ROI Turnover: €31,450,976

International Turnover: €38,618,613

BMD & Company’s turnover in 2025 was €57.3, a decrease of €46.5m from its 2024 turnover of €103.8m.

No 15: BMD & Company Limited

Total Turnover: €57,300,000

ROI Turnover: €56,850,000

International Turnover: €450,000