Critical Building
Critical Building is a privately held French engineering consultancy founded in 2006, specializing in independent consulting, design, construction supervision, and commissioning for data center and sensitive technical infrastructure. It serves enterprise, public-sector, and digital-economy clients across France and internationally.
- Company typePrivate
- Founded2006
- HeadquartersFontenay-aux-roses, France
- Headcount51–100
- GTM typeB2B
- OfferingServices
What Critical Building does
Critical Building is a privately held French engineering consultancy founded in 2006 and headquartered in Fontenay-aux-Roses, with a regional office in Dardilly (Lyon). The firm is structured as a S.A.S. with €300,000 in share capital and is owned by its two co-managing partners, Thibaut Siméon and Jean-Marc Dugoujon. The company specializes exclusively in data center and sensitive technical infrastructure, providing consulting, technical studies, audits, design, construction supervision, and commissioning services across electrical systems, cooling, security, and building infrastructure. The company employs 51–100 people and reports 19 years of experience.
The business model is project-based professional services sold directly to enterprise and institutional clients. Critical Building serves three primary verticals: private-sector industries and services (SMEs, mid-caps, and large corporates), public institutions (national and international government agencies, local authorities, defense organizations), and digital players (IT services firms, telecom operators, hosters, and cloud providers). Engagement values range from several hundred thousand euros to tens of millions of euros in construction value, with multi-year contract cadences. The firm explicitly positions itself as neutral and independent, with no financial ties to equipment manufacturers or contractors, and is affiliated with the Uptime Institute, Infranum, OCCA, and AFCOM, and adheres to the EU Code of Conduct for Data Centres.
Notable projects span hyperscale colocation (Equinix PA4, PA6; Interxion MRS3), public-sector infrastructure (Banque de France, Mairie de Paris via Sogaris, CNRS-IDRIS Jean Zay HPC), defense (ESID GALILEO), and energy (EDF). Beyond core consulting and project monitoring, the company has developed specialized service modules in commissioning, QA/QC, eco-design, sustainable development / carbon assessment, and energy performance optimization, reflecting alignment with EU energy efficiency and ESG mandates in the data center sector.
Critical Building firmographics
Firmographics- Name
- Critical Building
- Legal name
- Critical Building S.A.S
- Website
- https://criticalbuilding.fr
- Company type
- Private
- Founded year
- 2006
- Operating status
- Operating
- Headcount range
- 51–100 employees
- Short description
- Critical Building is a privately held French engineering consultancy founded in 2006, specializing in independent consulting, design, construction supervision, and commissioning for data center and sensitive technical infrastructure. It serves enterprise, public-sector, and digital-economy clients across France and internationally.
- Ownership category
- akta.pro rank
Critical Building industry classification
Industry- Product category
- Data Center Engineering Services
- NAICS
- Architectural, Engineering, and Related Services (5413)
- SIC
- General Bldg Contractors - Nonresidential Bldgs (1540)
- akta.pro primary industry
- Civil & Structural Engineering Consulting (BPAHAIAA)
- akta.pro secondary industry
- Government & Civic Building Construction (Courthouses, City Halls, Public Safety) (IMAFACAF)
Keywords
Where Critical Building is headquartered
LocationHeadquarters
- HQ city
- Fontenay-aux-roses
- HQ country
- France
- HQ region
- Europe
Offices2 records
Markets served
Critical Building business model
Business model- GTM type
- B2B
- Offering type
- Services
- Cost components
- Personnel, Operations, Technology or R&D, Marketing or Sales, Infrastructure
Revenue model
- Engineering Consulting Services: Professional services revenue from consulting, technical studies, audits, design, construction supervision, and commissioning for data center infrastructure projects. Services include technical due diligence, feasibility studies, master planning, project management, quality control, and performance optimization.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Other | Multi-year contract | Project-based professional services with customized scope |
Go-to-market motion1 record
Distribution channels1 record
Marketing channels3 records
Critical Building product offering
Product offeringCore offering
Critical Building is an independent French engineering consultancy dedicated exclusively to data center infrastructure. It delivers technical audits, feasibility and capacity studies, design, project management, construction supervision, quality control, and commissioning services across electrical, cooling, security, and structural disciplines. Its core mission is to defend the technical and economic interests of clients building, renovating, or optimizing sensitive technical infrastructure, with absolute neutrality from equipment vendors and contractors.
Product overview
Critical Building operates as a unified engineering services firm offering consulting, studies, and project execution services for data center infrastructure. The company provides two core service lines: Expertise et Conseils (strategic consulting and technical auditing) and Etudes et Suivi de Réalisations (studies and construction monitoring). These core services are supported by specialized modules including Commissioning, Quality Management (QA/QC), Design and Eco-Design, Sustainable Development and Carbon Assessment, and Energy Performance Optimization. The company emphasizes independence, technical rigor, and environmental consciousness across all service offerings.
Differentiator
Problem solved
Functional benefit
Products and services
- Expertise et Conseils (Expertise and Consulting) Technical and strategic consulting services for sensitive infrastructure, including technical audits, incident audits, capacity studies, financial valuation, site research, and strategic studies for data center projects. Targeted at enterprises, public institutions, and digital-economy players evaluating or planning infrastructure investments.
- Etudes et Suivi de Réalisations (Studies and Project Follow-up) Project management and construction monitoring services covering technical due diligence, administrative support, technical owner's representative services, master contracting, installation acceptance, and test campaign supervision for data center construction and renovation projects. Targeted at clients executing data center builds or major renovations.
- Commissioning Testing and validation services for data center installations including static and dynamic tests, coordinated performance testing of electrical and cooling distribution systems, installation validation, and documentation. Targeted at clients commissioning new or renovated data center infrastructure.
- Quality Management (QA/QC) Quality control and assurance services for data center construction projects, including quality plan review, technical study review, process quality monitoring, work inspection, and non-conformity management. Targeted at clients requiring rigorous construction quality oversight.
- Sustainable Development and Carbon Assessment Sustainability consulting including tertiary decree compliance, carbon footprint measurement for data center construction and operations, and development of assessment methodologies. Targeted at clients needing to meet environmental and energy efficiency regulations.
- Energy Performance Optimization Energy efficiency services for data centers including technical solution benchmarking, energy consumption optimization studies, performance calculations, and simulations. Targeted at clients seeking to reduce the energy footprint and operating cost of their data centers.
Companies that use Critical Building
Customer profileNamed customers9 records
Segments3 records
Ideal customer profiles3 records
Critical Building technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Critical Building partnerships and signals
Strategic signalPartnerships
Six partnerships are on record, tiered minor.
- Uptime InstituteminorIndustry affiliation with Uptime Institute, a leading data center authority. The logo appears on the company's website footer indicating membership or professional alignment with Uptime Institute's standards and expertise.
- InfranumminorIndustry affiliation with Infranum, the French digital infrastructure association. Logo displayed on website indicating professional membership.
- Club OCA / OCCAminorAffiliation with Club OCA (now OCCA), the French data center association. Logo displayed on website indicating professional membership.
- AFCOMminorAffiliation with AFCOM, a data center industry association. Logo displayed on website indicating professional membership.
- EU Code of Conduct for Data CentresminorAdherence to the European Code of Conduct for Data Centres, a voluntary initiative supported by the European Commission. Logo displayed indicating compliance with energy efficiency and sustainability standards.
- OVHminorOVH is the website hosting provider for criticalbuilding.fr. Listed in the legal notices as the site host.
Scale indicators3 records
Recent moves6 records
Expansion highlights6 records
Critical Building competitors and assessment
Company assessmentBroad incumbents
- Jacobs: Global engineering, technical and scientific services firm with deep data center and critical infrastructure capabilities spanning design, program management and commissioning — competing for the largest enterprise and hyperscale consulting mandates.
- Arcadis: Global design and engineering consultancy with a dedicated Data Center & Digital Infrastructure practice offering owner's representation, advisory and program management — competing for the same enterprise and colocation clients across Europe.
- Mott MacDonald: Global engineering consultancy with a dedicated data center practice covering advisory, design and project delivery for hyperscale and colocation operators — overlapping with Critical Building's engineering and supervision services at larger scale.
- Stantec: Global engineering and design firm with a Mission Critical / Data Center practice covering site selection, design, commissioning and PMO services — comparable in service breadth but with materially greater geographic and headcount scale than Critical Building.
- WSP: Global professional services firm with a strong mission-critical / data center engineering and advisory practice, providing design, PMO and commissioning services — a much larger scale peer targeting overlapping enterprise and hyperscale clients.
Regional players
- Egis: Major French engineering consultancy operating in buildings, energy and digital infrastructure, including data center and mission-critical projects — competing in the same French owner-representation and engineering studies market as Critical Building.
- Setec: French independent engineering group providing technical studies, project management and construction supervision across infrastructure and buildings — overlapping with Critical Building's owner-representation and studies/services for sensitive French infrastructure projects.
- Artelia: France-headquartered multi-disciplinary engineering firm with building, energy and infrastructure practices covering data center design, supervision and commissioning — the closest large French peer to Critical Building in terms of service mix and project values.
Direct peers
- Uptime Institute: Global data center standards authority and operator of the Tier classification system, which also provides consulting, certification and advisory services tied directly to data center design, build and operations — closely overlapping with Critical Building's owner's-representative and commissioning offerings.
- Turner & Townsend: Global project management and cost consultancy with a large, dedicated data center practice serving colocation and hyperscale clients on owner's-rep, program management and cost advisory engagements — directly comparable to Critical Building's project supervision and commissioning work.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat4 records
Key risks6 records
Key highlights7 records
Customer concentration
Critical Building social profiles
Digital presenceCritical Building financial estimates
Financial estimateRevenue estimate
Valuation estimate
Critical Building leadership team
Management profileNumber of profiles
Profiles2 records
Critical Building funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Critical Building 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 Critical Building
What does Critical Building do?
Critical Building is an independent French engineering consultancy dedicated exclusively to data center infrastructure. It delivers technical audits, feasibility and capacity studies, design, project management, construction supervision, quality control, and commissioning services across electrical, cooling, security, and structural disciplines. Its core mission is to defend the technical and economic interests of clients building, renovating, or optimizing sensitive technical infrastructure, with absolute neutrality from equipment vendors and contractors.
Is Critical Building a public or private company?
Critical Building is a private company. It is classified as founder individual operated bootstrapped and is currently operating.
When was Critical Building founded?
Critical Building was founded in 2006. It employs 51 to 100 people.
Where is Critical Building based?
Critical Building is headquartered in Fontenay-aux-roses, France, in the Europe region.
How does Critical Building make money?
One revenue line is on record: engineering Consulting Services.
Who are Critical Building's main competitors?
Broad incumbents on record are Jacobs, Arcadis, Mott MacDonald, Stantec and WSP. Regional players are Egis, Setec and Artelia. Direct peers are Uptime Institute and Turner & Townsend.
Does Critical Building have an API?
No public API is recorded for Critical Building.
What industry is Critical Building in?
Critical Building's product category is Data Center Engineering Services. Its primary akta.pro industry code is BPAHAIAA, Civil & Structural Engineering Consulting, with a secondary code of IMAFACAF, Government & Civic Building Construction (Courthouses, City Halls, Public Safety). Its NAICS code is 5413 and its SIC code is 1540.