IN2
IN2 Engineering is a Dublin-headquartered international building services engineering and sustainability consultancy founded in 2002, delivering M&E design, building physics, BIM, and decarbonisation services across 11 sectors from six offices in Ireland, the UK, and continental Europe.
- Company typePrivate
- Founded2002
- HeadquartersRanelagh, Ireland
- Headcount101–250
- GTM typeB2B
- OfferingServices
What IN2 does
IN2 Engineering is a Dublin-headquartered international building services engineering and sustainability consultancy founded in 2002 by Barry Flynn. The firm delivers mechanical and electrical (M&E) design, building physics analysis, Building Information Modelling (BIM), decarbonisation strategy and design, energy and infrastructure engineering, planning services, and aftercare/retrofit services. It serves 11 sectors including Data Centres, Energy & Infrastructure, Electrical & Utilities, Life Sciences, Aviation & Defence, Healthcare, Commercial, Education, Venues, Residential, and Conservation, with named enterprise clients such as Dublin Airport, Google, Goldman Sachs, Marriott, Zoom, WeWork, and the Royal Academy of Arts. Its Shanganagh Castle Estate engagement is positioned as Europe's largest Passive House project in 2025, evidencing capability in ultra-low-energy residential design.
The company's core technology stack centres on BIM-driven digital coordination, physics-based environmental and energy modelling, and decarbonisation design methodologies rather than proprietary software products. Its primary differentiators are multi-disciplinary integration of M&E engineering with sustainability expertise, and deep domain specialisation in Passive House and low-carbon building physics.
IN2 operates from six offices — Dublin and Athlone in Ireland, London and Belfast in the UK, and Berlin and Madrid in continental Europe — generating revenue through project-based professional services fees for consulting and design engagements. Pricing is not publicly disclosed and is negotiated quote-by-quote per project scope. Go-to-market is enterprise field sales led from regional offices, supported by sector-specific thought leadership, a technical news and insights blog, project case studies, and award-based brand credibility (Engineering Firm of the Year 2025; Great Place to Work 2025 and 2026). The firm is privately held with no disclosed funding rounds or institutional investors, and announced a leadership evolution in 2025 to drive the next phase of international growth.
IN2 firmographics
Firmographics- Name
- IN2
- Legal name
- IN2 Engineering
- Website
- https://in2.ie
- Company type
- Private
- Founded year
- 2002
- Operating status
- Operating
- Headcount range
- 101–250 employees
- Short description
- IN2 Engineering is a Dublin-headquartered international building services engineering and sustainability consultancy founded in 2002, delivering M&E design, building physics, BIM, and decarbonisation services across 11 sectors from six offices in Ireland, the UK, and continental Europe.
- Ownership category
- akta.pro rank
IN2 industry classification
Industry- Product category
- Building Services Engineering Consultancy
- NAICS
- Engineering Services (54133), Engineering Services (541330)
- SIC
- Services-Engineering Services (8711), Services-Engineering, Accounting, Research, Management (8700)
- akta.pro primary industry
- MEP (Mechanical, Electrical & Plumbing) Engineering Consulting (BPAHAIAE)
- akta.pro secondary industry
- Testing, Adjusting & Balancing (TAB) & Performance Verification (BPABACAJ)
Keywords
Where IN2 is headquartered
LocationHeadquarters
- HQ city
- Ranelagh
- HQ country
- Ireland
- HQ region
- Europe
Offices6 records
Markets served
IN2 business model
Business model- GTM type
- B2B
- Offering type
- Services
- Cost components
- Personnel, Operations, Technology or R&D, Marketing or Sales
Revenue model
- Engineering Consulting Services: Professional consulting services for building services engineering, M&E design, sustainability, and building physics. Revenue generated through project-based fees for design, engineering analysis, and consulting engagements on construction and infrastructure projects.
Go-to-market motion2 records
Distribution channels1 record
Marketing channels4 records
IN2 product offering
Product offeringCore offering
IN2 Engineering is an international engineering and sustainability consultancy delivering building services engineering, mechanical and electrical (M&E) design, building physics analysis, Building Information Modelling (BIM) coordination, and decarbonisation strategy for construction and infrastructure projects. Services span the full building lifecycle from concept design through planning, BIM coordination, and post-occupancy retrofit (aftercare). The firm operates from six offices across Ireland, the United Kingdom, and continental Europe.
Product overview
IN2 Engineering is a leading international engineering and sustainability consultancy offering a comprehensive portfolio of integrated services. The core offering consists of Built Environment (M&E Design), Energy & Infrastructure (Decarbonisation), Building Physics, Sustainability, Building Information Modelling (BIM), Planning Services, and Aftercare. These services work together to deliver complete building lifecycle solutions from design through to retrofit. The company also operates an IN2 Academy for staff development. IN2 serves multiple sectors including Data Centres, Energy & Infrastructure, Electrical & Utilities, Life Sciences, Aviation & Defence, Healthcare, Commercial, Education, Venues, Residential, and Conservation, operating from offices across Ireland (Dublin, Athlone), the UK (London, Belfast), and Europe (Berlin, Madrid).
Differentiator
Problem solved
Functional benefit
Products and services
- Built Environment (M&E Design)
Quantifiable outcome
- Average project carbon reduction of 30% by 2030
Companies that use IN2
Customer profileNamed customers8 records
Segments11 records
Ideal customer profiles5 records
IN2 technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature4 records
IN2 partnerships and signals
Strategic signalScale indicators4 records
Recent moves5 records
Expansion highlights5 records
IN2 competitors and assessment
Company assessmentBroad incumbents
- Ramboll: Global engineering consultancy with a strong sustainability and decarbonisation practice that overlaps with IN2's energy and infrastructure offering. Competes on European projects but at materially larger scale.
- WSP: Global professional services firm with a substantial property and buildings division covering MEP, sustainability and decarbonisation. Competes with IN2 on European enterprise projects but operates with much broader scale and service breadth.
- Mott MacDonald: Global engineering, management and development consultancy with a substantial building services and sustainability practice. Competitor on large-scale European infrastructure and building projects, though broader in scope than IN2.
Direct peers
- Hoare Lea: UK-based building services engineering consultancy specialising in MEP design, sustainability, and building physics across commercial, healthcare, education and cultural sectors — a very direct competitor.
- Cundall: Multi-disciplinary engineering consultancy with strong M&E, building services, and sustainability specialisation in the UK, Ireland and internationally. Highly comparable service portfolio and similar client profile.
- Atelier Ten: Specialist building physics and sustainability design consultancy with offices in the UK, Europe, US and Australia. Closely comparable in building physics, Passive House expertise, and decarbonisation-focused project type.
- Sweco: European engineering, design and consultancy firm with significant presence in the Nordics, Germany, Netherlands and UK. Comparable in MEP and sustainability capability and active across similar building and infrastructure sectors.
- Arup: Global engineering consultancy with deep building services, MEP, sustainability and building physics practices. Direct competitor on large multi-disciplinary European building projects across the same sectors IN2 serves.
- Buro Happold: International engineering consultancy with a strong building services engineering, building physics, and sustainability practice. Closely comparable in service mix, project type, and target client profile.
- Hilson Moran: Building services engineering consultancy specialising in MEP design and sustainability across UK and Ireland commercial, residential, healthcare and education sectors — directly comparable size and offering.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat4 records
Key risks6 records
Key highlights7 records
Customer concentration
IN2 social profiles
Digital presenceIN2 compliance and trust
Trust signalCompliance1 record
IN2 financial estimates
Financial estimateRevenue estimate
Valuation estimate
IN2 leadership team
Management profileNumber of profiles
Profiles2 records
IN2 funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
IN2 M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about IN2
What does IN2 do?
IN2 Engineering is an international engineering and sustainability consultancy delivering building services engineering, mechanical and electrical (M&E) design, building physics analysis, Building Information Modelling (BIM) coordination, and decarbonisation strategy for construction and infrastructure projects. Services span the full building lifecycle from concept design through planning, BIM coordination, and post-occupancy retrofit (aftercare). The firm operates from six offices across Ireland, the United Kingdom, and continental Europe.
Is IN2 a public or private company?
IN2 is a private company. It is classified as founder individual operated bootstrapped and is currently operating.
When was IN2 founded?
IN2 was founded in 2002. It employs 101 to 250 people.
Where is IN2 based?
IN2 is headquartered in Ranelagh, Ireland, in the Europe region.
How does IN2 make money?
One revenue line is on record: engineering Consulting Services.
Who are IN2's main competitors?
Broad incumbents on record are Ramboll, WSP and Mott MacDonald. Direct peers are Hoare Lea, Cundall, Atelier Ten, Sweco, Arup, Buro Happold and Hilson Moran.
Does IN2 have an API?
No public API is recorded for IN2.
What industry is IN2 in?
IN2's product category is Building Services Engineering Consultancy. Its primary akta.pro industry code is BPAHAIAE, MEP (Mechanical, Electrical & Plumbing) Engineering Consulting, with a secondary code of BPABACAJ, Testing, Adjusting & Balancing (TAB) & Performance Verification. Its NAICS code is 54133 and its SIC code is 8711.