What CJK Engineering does

CJK Engineering is a specialist electrical, mechanical, and instrumentation (M&E) engineering contractor headquartered in Dublin, Ireland, founded in 1998 by Conor Kearney and led today by Managing Director Vincent Bruen. The company delivers integrated M&E services across six primary verticals: hyperscale data centres, pharmaceutical manufacturing, aviation/airports, healthcare, commercial buildings, and education and government facilities. Its service portfolio includes LV/MV electrical installations, mechanical pipework and HVAC (delivered through the McGrattan & Kenny division acquired in August 2021), instrumentation for pharmaceutical and industrial applications, baggage handling system installations at major Irish airports, and sustainable building fit-outs including LEED platinum-rated projects. Named clients include DAA, Trinity College Dublin, OPW, Astellas Pharma, PM Group, Fiserv, Vhi, Bus Éireann, UCD, and An Garda Síochána. CJK employs 251-500 staff (approximately 360 in 2024, targeting 400+ by 2025) across its Dublin 11 headquarters and a Naas, Co. Kildare office.

The business operates a project-based professional services revenue model, securing work primarily through direct enterprise sales, senior management relationships, and competitive tendering. Project economics are custom-quoted based on scope, scale, and sector requirements rather than published list pricing. The company differentiates through safety credentials (ISO 9001, 14001, and 45001; 250,000 LTI-free hours on a pharmaceutical project), sustainability credentials (LEED and BREEAM expertise, Alcumus SafeContractor Gold Sustainability Verification), and continuous investment in workforce development via structured apprenticeships, a 2-year graduate programme, and the Achieving CJK Excellence (ACE) digital transformation initiative built on Procore. It has been listed in Ireland's Best Employers for three consecutive years (2021-2023), ranking 17th in 2022 as the highest-placed construction company.

Financially, CJK disclosed combined 2024 turnover of approximately €45 million following the McGrattan & Kenny acquisition and is targeting turnover exceeding €75 million with headcount above 400 by 2025 under its [Y]Our Opportunity 2025 strategy. Geographic reach is currently Ireland (primarily Leinster), with stated international expansion ambitions supported by a new Dublin headquarters signed in February 2023 featuring training facilities and modular construction capability. The company is privately held with no disclosed external investors.

Name

CJK Engineering

Legal name

CJK Engineering

Website

https://cjkengineering.ie

Company type

Private

Founded year

1998

Operating status

Operating

Headcount range

251–500 employees

Short description

CJK Engineering is an Irish specialist electrical, mechanical, and instrumentation engineering contractor serving enterprise clients across data centre, pharmaceutical, aviation, healthcare, commercial, and government sectors. Founded in 1998 and headquartered in Dublin, the company delivers integrated M&E installations and projects primarily across Ireland.

Ownership category

akta.pro rank

Product category

Mechanical & Electrical Engineering Services

NAICS

Engineering Services (541330), Architectural, Engineering, and Related Services (5413)

SIC

General Bldg Contractors - Nonresidential Bldgs (1540), Services-Engineering Services (8711), Industrial Instruments For Measurement, Display, And Control (3823)

akta.pro primary industry

Electrical Contracting & Wiring (IMAFALAA)

akta.pro secondary industry

Instrumentation & Process Control (I&C) (EDAOABAF)

Keywords

• Mechanical electrical engineering
• Electrical contracting services
• Data centre installations
• Pharmaceutical M&E services
• Airport infrastructure systems

Headquarters

HQ city

Dublin

HQ country

Ireland

HQ region

Europe

Offices2 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Supply Chain, Technology or R&D, Infrastructure, Marketing or Sales

Revenue model

1. Mechanical and Electrical Engineering Services: CJK generates revenue through project-based contracts delivering mechanical and electrical engineering services including electrical installations, mechanical pipework, HVAC, ventilation, instrumentation and control systems for construction projects across pharmaceutical, data centre, aviation, healthcare, and commercial sectors.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels9 records

Core offering

CJK Engineering is a specialist electrical, mechanical and instrumentation engineering contractor delivering comprehensive M&E installation services across Ireland. The company provides electrical installations, mechanical pipework, HVAC, ventilation, instrumentation and control systems for construction projects in data centre, pharmaceutical, aviation, healthcare, commercial and education sectors through project-based contracts.

Product overview

CJK Engineering is a specialist electrical, mechanical, and instrumentation engineering company offering a comprehensive portfolio of services. The company operates as a unified engineering services group, combining its core electrical, mechanical, and instrumentation divisions (including acquired brand McGrattan & Kenny) to deliver integrated M&E solutions across diverse sectors. Their service offerings span hyperscale data centre electrical installations, airport baggage handling systems, sustainable office fit-outs, heritage building electrical services, and ESG advisory. The company complements its engineering services with talent development programs including graduate and apprenticeship initiatives, creating a complete ecosystem for project delivery and workforce development.

Differentiator

Problem solved

Functional benefit

Products and services

• Electrical Engineering Services
• Mechanical Engineering Services
• Instrumentation Engineering Services
• Hyperscale Data Centre Electrical Services
• Baggage Handling System Installations
• Sustainable Office Fit-Out
• Heritage Building Electrical Services
• ESG and Sustainability Services
• Graduate Programme
• Apprenticeship Programme

Quantifiable outcome

• 250,000 hours with no Lost Time Injury on pharmaceutical project
• +3 more outcomes

Named customers10 records

Segments6 records

Ideal customer profiles5 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

Eight partnerships are on record, tiered core and minor.

• McGrattan & KennycoreStrategic or Co-development Partner · 13 August 2021CJK acquired McGrattan & Kenny in August 2021 to form a new mechanical and electrical services group. The combined entity creates a stronger M&E contractor with expanded capabilities and service offerings. Operations continue as separate companies within the shared group structure with projected combined turnover of €45 million and workforce of 360 employees by 2024.
• DAA (Dublin Airport Authority)coreStrategic or Co-development PartnerLong-standing client partnership spanning over 22 years. CJK has completed all baggage handling system projects across Ireland's major airports including Dublin, Cork, and Shannon. Working with partners Daifuku, Siemens and Vanderlande on HBS projects.
• PM GroupcoreImplementation/ SI/ Consulting PartnerCJK works alongside PM Group on pharmaceutical projects, receiving Safety Award for achieving 250,000 LTI-free hours. Also collaborated on Astellas Pharma campus projects.
• Coolmine Therapeutic CommunitycoreOthersCJK is a Charity Partner of Coolmine Therapeutic Community since 2019. Partnership includes supporting apprenticeships and career opportunities for Coolmine graduates, awareness and fundraising efforts, and donations (€25,000 in 2024, €7,000 from charity hike, €3,000 from Camino trek). CJK founder Conor Kearney met Taoiseach Leo Varadkar at Coolmine's Ashleigh House.
• Pembroke Cricket ClubminorOthersCJK has been kit sponsor of Pembroke Cricket Club since 2018, supporting the club's development and community engagement. Founder Conor Kearney is personally passionate about cricket.
• Lighthouse Construction Industry CharityminorOthersCJK partners with Lighthouse Construction Industry Charity for mental health support and suicide prevention initiatives. Hosted mental health talks and staff signed up for Mental Health First Aider course.
• Daifuku, Siemens, VanderlandecoreTechnology or IntegrationCJK works alongside these baggage handling system partners on Dublin Airport projects, delivering full electrical, mechanical, control and ICT installations.
• Bus ÉireanncoreStrategic or Co-development PartnerCJK delivered Ireland's first all-electric zero-emission bus depot for Bus Éireann in Athlone, including full CSA & electrical design, build and installation of EV bus chargers and MV substation.

Scale indicators10 records

Recent moves6 records

Expansion highlights5 records

Direct peers

• Kirby Group Engineering: Limerick-based M&E contractor operating across Ireland, UK and continental Europe, with significant data centre, pharma and industrial capability. Direct peer in both service offering and target end-markets.
• Mercury Engineering: Ireland's largest specialist M&E contractor with pan-European operations across data centres, pharma, healthcare and semiconductors. Directly comparable to CJK in sector mix and hyperscale data centre focus, but at materially greater scale.
• Jones Engineering Group: Large Irish-headquartered M&E contractor with deep pharma, data centre, healthcare and industrial exposure across Ireland, UK and Europe. Closest direct competitor to CJK in pharmaceutical and data centre verticals.
• Suir Engineering: Irish M&E and instrumentation contractor with strong data centre and pharma exposure, including international operations in Germany. Directly comparable on instrumentation services and data centre credentials; former employer of CJK's Construction Director.
• Dornan Engineering: Irish-headquartered M&E contractor with significant presence in data centres, life sciences and advanced manufacturing across Ireland, UK and Nordics. Comparable in core verticals and hyperscale project experience.
• Designer Group: Irish M&E contractor focused on data centres, pharmaceutical, healthcare and commercial sectors. Direct peer with overlapping service portfolio and similar enterprise client base in Ireland and UK.
• Winthrop Engineering: Specialist electrical, mechanical and instrumentation contractor headquartered in Ireland serving data centres, pharma and industrial clients. Closely comparable in size, scope and instrumentation offering.
• L.M. Keating: Irish building and M&E contractor with growing data centre and pharma exposure. Comparable in domestic Irish market positioning, though less specialised than CJK in instrumentation.

Emerging players

• Ethos Engineering: Irish mechanical and electrical contractor focused on data centres and high-tech industrial facilities. Comparable end-market focus but a smaller, more emerging platform relative to CJK.

Regional players

• T.J. O'Connor & Associates: Irish mechanical and electrical contractor serving commercial, healthcare, education and data centre sectors. Comparable service offering in the Irish market but with a more generalist project mix.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xx.com/CJKEngineering
• Facebookfacebook.com/cjkengineering
• LinkedInie.linkedin.com/company/cjk-engineering
• Instagraminstagram.com/cjk.eng/?hl=en

Revenue estimate

Valuation estimate

Number of profiles

Profiles19 records

Subsidiaries1 record

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A1 record

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about CJK Engineering