Cabinet JAILLET-ROUBY

What Cabinet JAILLET-ROUBY does

Cabinet JAILLET-ROUBY Ingénieurs-Conseils is a French structural engineering consultancy founded in 1961 in Orléans by Gabriel Jaillet and Michelyne Rouby. The firm specializes in design and engineering studies for complex metal, wood, and concrete structures, and since 2019 has been co-directed by Najah Ayoub (Ingénieur ESIB-ENPC) and Jean-Philippe Deprez (Ingénieur HEH Belgium), following the earlier leadership transition to Florent Millot in 1994. It operates from two offices—Orléans (headquarters, 8 rue Albert 1er) and Paris (opened 2 November 2021 in the 13th arrondissement near gare d'Austerlitz/Lyon)—serving public authorities, architects, construction majors (Vinci Construction, Bouygues Constructions, Eiffage, GTM Bâtiment, Demathieu Bard, Baudin Châteauneuf), and large industrial clients including EDF, Arcelor Mittal, Airbus, Air France, and Alstef. The firm holds NF EN ISO 9001 (BSI, FS 569271) and four OPQIBI qualifications (1204, 1205, 1218, 1219) covering both standard and complex metal and civil engineering studies.

Its core offering, "Ingénierie Structure," is delivered through structured service modules spanning preliminary studies (Études Préliminaires), execution studies (Études d'Exécutions) with TEKLA BIM modeling, technical assistance (Assistance Technique), tender consultation (Consultation d'Entreprises), and on-site construction monitoring (Travaux/Sui vi de Chantier). Underpinning delivery is Hergos, a proprietary in-house calculation software conceived and maintained over nearly 30 years, which models all structure types and performs automatic regulatory verification against CM66 and Eurocodes standards. The firm bills through project-based B2B professional services engagements with multi-year contract cadences; no public pricing exists, and the firm explicitly emphasizes independence from any industrial or commercial affiliation as a differentiation principle.

The firm has completed over 2,000 projects since 1961, with 333 projects, 34 competitions, and 176 clients documented over the 2011-2021 period. Landmark works include the Stade de France, Stade Atatürk Istanbul, Musée des Confluences (Lyon), Musée du Quai Branly, Philharmonie de Paris, Hippodrome de Longchamp, Paris La Défense Arena, Stade de Bordeaux (Matmut Atlantique), Usine J.L. Lagardère (Airbus A380 assembly halls, 200,000 m²), and the Chernobyl New Safe Confinement arch (33,000 tonnes). The firm has been recognized with national and European steel construction awards, including multiple Trophées Eiffel and European Steel Construction Awards, and reports an 88% employee satisfaction rate from an internal survey in March 2025.

Name

Cabinet JAILLET-ROUBY

Legal name

Cabinet JAILLET-ROUBY Ingénieurs-Conseils

Website

https://jaillet-rouby.fr

Company type

Private

Founded year

1961

Operating status

Operating

Headcount range

11–50 employees

Short description

Cabinet JAILLET-ROUBY is a French structural engineering consultancy founded in 1961 in Orléans, specializing in complex metal, wood, and concrete structure design using the proprietary Hergos calculation software, serving architects, construction majors, and public authorities across France and internationally.

Ownership category

akta.pro rank

Product category

Structural Engineering Consulting

NAICS

Architectural, Engineering, and Related Services (5413)

SIC

Services-Engineering Services (8711), Services-Engineering, Accounting, Research, Management (8700)

akta.pro primary industry

Civil & Structural Engineering Consulting (BPAHAIAA)

Keywords

• Structural engineering services
• Complex structures design
• Metal frame studies
• Construction engineering consultancy
• Technical assistance services

Headquarters

HQ city

Orléans

HQ country

France

HQ region

Europe

Offices2 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Engineering Studies and Technical Assistance: Professional services revenue from structural engineering studies, design, and technical consulting for construction projects. Services include preliminary studies, execution studies, construction management, and expert assessments for metal, wood, and concrete structures.

Pricing tiers

Go-to-market motion1 record

Distribution channels1 record

Marketing channels5 records

Core offering

Cabinet JAILLET-ROUBY is a structural engineering consultancy that conceives, designs, and studies complex metal, wood, and concrete structures for architects, construction companies, public authorities, and industrial clients. Services span preliminary studies, execution studies, technical assistance, tender consultation, and on-site construction monitoring across sectors including sports, culture, aerospace, industry/energy, public infrastructure, and tertiary buildings. The firm also develops and maintains Hergos, an in-house structural calculation software used across projects.

Product overview

Cabinet Jaillet-Rouby is a structural engineering consultancy offering a comprehensive suite of engineering services. The core offering is Ingénierie Structure covering metal, wood, and concrete structures, delivered through distinct service modules: Études Préliminaires (preliminary studies), Études d'Exécutions (execution studies), Assistance Technique (technical assistance), Consultation d'Entreprises (company consultation), and Travaux (site monitoring). The company also develops Hergos, a proprietary calculation software tool internally. The portfolio spans preliminary design, execution studies, technical assistance, and construction follow-up across sectors including culture, sport, aeronautics, industry, energy, public infrastructure, and tertiary buildings.

Differentiator

Problem solved

Functional benefit

Products and services

• Structural Engineering Studies - Metal, Wood, and Concrete (Ingénierie Structure) Core structural engineering services covering metal, wood, and concrete structures. The company specializes in complex structural design, feasibility studies, preliminary and execution studies, and technical assistance for construction projects delivered to architects, construction companies, public authorities, and industrial clients.
• Hergos Proprietary Calculation Software Internally developed calculation software conceived and built by the Cabinet JAILLET-ROUBY team for nearly 30 years. Allows modeling of all types of structures with automatic verification according to different regulations (CM66, Eurocodes) and adapts to complex, large-span, or non-standard structural challenges, providing great reactivity for project teams.

Quantifiable outcome

• Over 2,000 projects completed since 1961
• +3 more outcomes

Named customers17 records

Segments6 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature1 record

Partnerships

Ten partnerships are on record, tiered core and minor.

• Jean-François Schmit ArchitectescoreStrategic or Co-development PartnerArchitecture firm partner for the Franco-German Air Base BA105 project at Evreux-Fauville, working together on aircraft areas, maintenance hangars, and tertiary building.
• SOGETIminorStrategic or Co-development PartnerEngineering consultancy partner for the Franco-German Air Base BA105 project.
• GTM Normandie CentreminorChannel Partner/ Reseller/ DistributorConstruction partner for the Franco-German Air Base BA105 project.
• SOGEA CentreminorChannel Partner/ Reseller/ DistributorConstruction partner for the Franco-German Air Base BA105 project.
• EBIminorChannel Partner/ Reseller/ DistributorPartner company co-organizing annual client events such as the Bateau Lavoir evening in Orléans.
• WIENERBERGERminorChannel Partner/ Reseller/ DistributorPartner company co-organizing annual client events.
• RECTORminorChannel Partner/ Reseller/ DistributorPartner company co-organizing annual client events.
• Beguin et Macchini ArchitectescoreStrategic or Co-development PartnerArchitecture firm partner for Cité Internationale Universitaire de Paris rehabilitation project (Fondation Avicenne) and Péages Chamant-Senlis – Fresnes project.
• Consortium NOVARKAcoreStrategic or Co-development PartnerConsortium partner for the Chernobyl New Safe Confinement (NSC) project - designed the entire metal structure of the confinement arch.
• INGEROP AFRICAminorStrategic or Co-development PartnerEngineering partner for Complexe sportif Malabo project in Equatorial Guinea.

Scale indicators6 records

Recent moves6 records

Expansion highlights5 records

Broad incumbents

• Egis: Major French engineering group offering multi-disciplinary services (structures, infrastructure, transport, energy) with global presence. Overlaps with Jaillet-Rouby on structural studies for large public infrastructure and energy projects but operates at vastly larger scale and broader scope.
• ARUP: Global engineering consultancy with renowned structural engineering practice delivering iconic buildings, stadiums, and cultural venues worldwide. Competes with Jaillet-Rouby on high-profile international landmark projects.
• Ingérop: French independent engineering group active in building, infrastructure, energy, and transport. Directly competes on structural design for complex French public and energy projects (documented partner relationship on Equatorial Guinea sports complex).
• Setec: French multi-disciplinary engineering group with strong structural and infrastructure practices. Competes with Jaillet-Rouby on complex building structures, transportation infrastructure, and energy projects in France.
• WSP Global (formerly WSP | Parsons Brinckerhoff): Large international engineering consultancy with building structures practice serving sports venues, cultural buildings, and large public infrastructure. Competes globally on the same typology of landmark projects as Jaillet-Rouby.

Emerging players

• Bureau Veritas: Global testing, inspection, and certification firm increasingly offering engineering and asset integrity services. Overlaps with Jaillet-Rouby's Assistance Technique (audit, expertise, control) service line rather than core design studies.

Direct peers

• Bollinger + Grohmann: German-headquartered independent structural engineering consultancy with similar boutique profile, specializing in complex metal, timber, and concrete structures for landmark cultural, sports, and public buildings across Europe. Comparable size, independent ownership, and project-type focus.
• T/E/S/S - Technique Engineering Structure Surfaces: Paris-based independent structural engineering consultancy specializing in complex metal, wood, and concrete structures for architecture-driven projects. Highly comparable in scale, independence, French market positioning, and project typology.
• Schlaich Bergermann Partner: German independent structural engineering firm renowned for complex steel, cable, and lightweight structures on iconic international projects (stadiums, bridges, cultural buildings). Direct peer in the niche of high-profile, structurally demanding landmark projects.

Regional players

• BEG Ingenierie: Independent French structural engineering consultancy based in Toulouse, focusing on complex building structures in southern France. Comparable boutique profile but primarily regional rather than national/international.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat4 records

Key risks5 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/cabinet-jaillet-rouby

Compliance2 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles2 records

Funding overview

Funding rounds

Investors

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

M&A

Investments

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

Frequently asked questions about Cabinet JAILLET-ROUBY