Maïa Sonnier
Maïa Sonnier is the core civil engineering subsidiary of Groupe MAÏA's Infrastructures & Environnement pole, delivering industrial, hydraulic, nuclear, and urban infrastructure projects for French public-sector clients from its Lyon headquarters, leveraging an integrated in-house design office and 13 specialized trades.
- Company typePrivate
- Founded-
- HeadquartersLyon, France
- Headcount101–250
- GTM typeB2B
- OfferingServices
What Maïa Sonnier does
Maïa Sonnier is a core operating subsidiary within the Infrastructures & Environnement pole of Groupe MAÏA, a diversified French construction conglomerate with over a century of history. Headquartered at 1 rue de l'Antiquaille in Lyon, the company specializes in industrial, hydraulic, nuclear, and urban civil engineering, as well as ouvrages d'art (bridges and art structures). It serves primarily public-sector clients — municipalities, government agencies, and transportation authorities — alongside private industrial customers, executing complex infrastructure projects often in occupied or constrained operational sites such as airports, tramways, and heritage buildings.
The company's core technology centers on integrated civil engineering execution, anchored by an in-house design office (bureau d'études) organized around targeted technical competencies. This enables end-to-end project delivery from feasibility study through realization, spanning 13 specialized trades (métiers). Notable technical capabilities include carbon fiber structural reinforcement (demonstrated on the Romans-sur-Isère chapel heritage project), heavy civil works for rail and airport infrastructure (CDG Express platform completion, VALTRAM tramway construction), and nuclear/hydraulic civil engineering. Quality, safety, and environmental management are certified to ISO 9001, OHSAS 18001, and ISO 14001 standards via AFAQ (AFNOR).
Maïa Sonnier operates a B2B enterprise field sales motion targeting project owners through direct engagement and public procurement processes. Revenue is generated on a project-by-project basis under one-time construction contracts — no recurring subscription or licensing model applies. The company is part of a seven-subsidiary pole (alongside Maïa Fondations, Deluermoz, Maïa Rail, Maïa Sécurité Ferroviaire, Maïa Transtelec, and Bernasconi/Enrobit) that collectively employs approximately 500 collaborators, including 300 engineers and senior technicians. Maïa Sonnier itself is listed with 123 employees per the firmographic record, and serves as the historical foundation (socle historique) of Groupe MAÏA.
Maïa Sonnier firmographics
Firmographics- Name
- Maïa Sonnier
- Legal name
- MAIA Sonnier
- Website
- https://maia-construction.groupe-maia.com
- Company type
- Private
- Operating status
- Operating
- Headcount range
- 101–250 employees
- Short description
- Maïa Sonnier is the core civil engineering subsidiary of Groupe MAÏA's Infrastructures & Environnement pole, delivering industrial, hydraulic, nuclear, and urban infrastructure projects for French public-sector clients from its Lyon headquarters, leveraging an integrated in-house design office and 13 specialized trades.
- Ownership category
- akta.pro rank
Maïa Sonnier industry classification
Industry- Product category
- Civil Engineering and Infrastructure Construction
- NAICS
- Heavy and Civil Engineering Construction (237), Highway, Street, and Bridge Construction (237310), Utility System Construction (2371)
- SIC
- Heavy Construction Other Than Bldg Const - Contractors (1600)
- akta.pro primary industry
- Construction Management & Delivery (EPCM/CMAR/Design-Build Oversight) (EUANALAE)
- akta.pro secondary industries
- Civil & Structural Engineering Consulting (BPAHAIAA), Retaining Walls & Slope Stabilization (Embankments, Rockfall Protection) (IMAFAEAH)
Keywords
Where Maïa Sonnier is headquartered
LocationHeadquarters
- HQ city
- Lyon
- HQ country
- France
- HQ region
- Europe
Offices1 record
Markets served
Maïa Sonnier business model
Business model- GTM type
- B2B
- Offering type
- Services
- Cost components
- Personnel, Operations, Supply Chain, Infrastructure, Marketing or Sales
Revenue model
- Construction and Infrastructure Services: Project-based revenue from civil engineering, infrastructure construction, and specialized construction works. Revenue is generated through public procurement contracts and private sector projects.
Go-to-market motion1 record
Distribution channels1 record
Marketing channels1 record
Maïa Sonnier product offering
Product offeringCore offering
Maïa Sonnier is a French civil engineering and infrastructure construction firm operating as the historical core subsidiary of Groupe MAÏA's Infrastructures & Environnement pole. It delivers industrial, hydraulic, nuclear, and urban civil engineering works as well as art structures (ouvrages d'art), supported by an in-house design office that enables end-to-end project execution from study to realization for public and private sector clients.
Product overview
Maïa Sonnier is a subsidiary of Groupe MAÏA's Infrastructures & Environnement pole, offering a multi-subsidiary portfolio of civil engineering and infrastructure services. The pole comprises seven specialized companies: Maïa Sonnier (Industrial, Hydraulic, Nuclear, and Urban Civil Engineering; Art Structures), Maïa Fondations (Foundations, Retaining Structures, Fluvial and Maritime Works), Deluermoz (Heritage and Specialty Works), Maïa Rail (Railway Track Construction and Maintenance), Maïa Sécurité Ferroviaire (Railway Safety), Maïa Transtelec (Telecommunications Infrastructure), and Bernasconi/Enrobit (Materials Manufacturing). The pole employs over 300 experts and 500 collaborators, delivering integrated solutions from study to execution for complex infrastructure projects including works in operational and constrained sites.
Differentiator
Problem solved
Functional benefit
Products and services
- Industrial Civil Engineering (Génie Civil Industriel) Industrial civil engineering services for industrial operators and project owners, covering design and execution of industrial facilities and structures.
- Hydraulic Civil Engineering (Génie Civil Hydraulique) Hydraulic civil engineering works for water-related infrastructure projects, delivered to public and private clients.
- Nuclear Civil Engineering (Génie Civil Nucléaire) Civil engineering services for nuclear facilities, requiring high technical expertise and quality standards.
- Urban Civil Engineering (Génie Urbain) Urban civil engineering services for municipalities and public administrations, covering urban infrastructure development and maintenance.
- Art Structures (Ouvrages d'Art) Construction of bridges and art structures (ouvrages d'art) for public and private sector clients.
- Integrated Study Bureau (Bureau d'Études) In-house engineering design office providing study and design services that integrate with project execution, supporting technical innovation and agility across the Infrastructures & Environnement pole.
Quantifiable outcome
- Execution of major projects such as CDG Express (4+ years, started 2019) and heritage restoration at Romans-sur-Isère
Companies that use Maïa Sonnier
Customer profileNamed customers5 records
Segments2 records
Ideal customer profiles2 records
Maïa Sonnier technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature1 record
Maïa Sonnier partnerships and signals
Strategic signalPartnerships
Two partnerships are on record, tiered core.
- FRANKI FONDATIONcoreMAIA SONNIER (as lead contractor/mandataire) works in consortium with FRANKI FONDATION and MBB for the VALTRAM project in Aubagne, forming the consortium (groupement titulaire) responsible for the tramway infrastructure.
- MBBcoreMAIA SONNIER (as lead contractor/mandataire) works in consortium with FRANKI FONDATION and MBB for the VALTRAM project in Aubagne, forming the consortium (groupement titulaire) responsible for the tramway infrastructure.
Scale indicators4 records
Expansion highlights4 records
Maïa Sonnier competitors and assessment
Company assessmentDirect peers
- NGE (Nouvelles Générations d'Entrepreneurs): Mid-size French infrastructure specialist operating across civil engineering, foundations, rail, and networks. Comparable in scale and multi-trade footprint, and competes with Maïa Sonnier on public infrastructure tenders in France.
- Razel-Bec: Fayat-group subsidiary focused on civil works, large infrastructure, foundations, and earthmoving. Closely comparable to Maïa Sonnier's general civil-engineering and infrastructure project profile, particularly in public works.
- Demathieu Bard: French civil engineering and construction group with overlapping specialties in nuclear, hydraulic, and complex infrastructure. Similar mid-market positioning and technical depth make it a strong direct comparator.
- Spie batignolles: Independent French construction group of comparable size, with multi-specialty civil engineering, infrastructure, and building operations. Highly comparable to Maïa Sonnier's diversified civil-engineering portfolio across industrial, hydraulic, urban, and structural works within France.
- Léon Grosse: Independent French construction group active in building, civil engineering, and infrastructure. Comparable in size and multi-domain approach, with comparable specialization in complex public-sector projects.
- TPF (Travaux Publics et Ferroviaires): French civil engineering and railway works contractor. Overlaps with Maïa Sonnier's art structures, urban infrastructure, and railway-adjacent civil works, with similar public-sector client focus.
Broad incumbents
- Eiffage Construction: Major diversified French construction group with a broad portfolio spanning civil engineering, energy, and concessions. Competes with Maïa Sonnier on large public infrastructure tenders but operates at significantly larger scale and broader scope.
- Fayat: Diversified French construction group and parent of Razel-Bec, with broad civil works, foundations, and infrastructure operations. Comparable at the group level to Groupe MAÏA's diversified subsidiary model.
- Bouygues Construction: Major French and international construction group covering building, civil works, and energy infrastructure. Overlaps with Maïa Sonnier on complex public projects but operates at much larger scale and broader geographic footprint.
- VINCI Construction: Largest French construction group, with extensive civil engineering, rail, and hydraulic capabilities (e.g., VINCI Construction France, Eurovia, etc.). Competes head-on with Maïa Sonnier on major French infrastructure tenders.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat4 records
Key risks6 records
Key highlights7 records
Customer concentration
Maïa Sonnier social profiles
Digital presenceMaïa Sonnier compliance and trust
Trust signalCompliance3 records
Maïa Sonnier financial estimates
Financial estimateRevenue estimate
Valuation estimate
Maïa Sonnier leadership team
Management profileNumber of profiles
Maïa Sonnier funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Maïa Sonnier 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 Maïa Sonnier
What does Maïa Sonnier do?
Maïa Sonnier is a French civil engineering and infrastructure construction firm operating as the historical core subsidiary of Groupe MAÏA's Infrastructures & Environnement pole. It delivers industrial, hydraulic, nuclear, and urban civil engineering works as well as art structures (ouvrages d'art), supported by an in-house design office that enables end-to-end project execution from study to realization for public and private sector clients.
Is Maïa Sonnier a public or private company?
Maïa Sonnier is a private company. It is classified as corporate owned and is currently operating.
When was Maïa Sonnier founded?
Maïa Sonnier was founded in -1. It employs 101 to 250 people.
Where is Maïa Sonnier based?
Maïa Sonnier is headquartered in Lyon, France, in the Europe region.
How does Maïa Sonnier make money?
One revenue line is on record: construction and Infrastructure Services.
Who are Maïa Sonnier's main competitors?
Direct peers on record are NGE (Nouvelles Générations d'Entrepreneurs), Razel-Bec, Demathieu Bard, Spie batignolles, Léon Grosse and TPF (Travaux Publics et Ferroviaires). Broad incumbents are Eiffage Construction, Fayat, Bouygues Construction and VINCI Construction.
Does Maïa Sonnier have an API?
No public API is recorded for Maïa Sonnier.
What industry is Maïa Sonnier in?
Maïa Sonnier's product category is Civil Engineering and Infrastructure Construction. Its primary akta.pro industry code is EUANALAE, Construction Management & Delivery (EPCM/CMAR/Design-Build Oversight), with a secondary code of BPAHAIAA, Civil & Structural Engineering Consulting. Its NAICS code is 237 and its SIC code is 1600.