B+S ENGINEERS

What B+S ENGINEERS does

B+S ingénieurs SA (operating as B+S ENGINEERS) is a private Geneva-based structural, civil and environmental engineering consultancy founded in 1953. The firm delivers structural design and construction engineering services for public infrastructure (pedestrian bridges, Rhône lagoon preservation), social and residential housing (notably a 335-balcon retrofit of the Fontenette HBM towers), and architectural-competition projects undertaken in partnership with firms such as LIN.ROBBE.SEILER Architectes. Its technical differentiators include an 8 cm innovative vaulted-slab concept, expertise in soft-mobility infrastructure, and a growing specialization in low-carbon construction and material reuse, most visible through its role in the TERRADEK innovation partnership with TERRABLOC, HEPIA and BATJ SA.

The firm's revenue mechanics are project-based B2B engineering services acquired through architectural competitions and direct commissions from public institutions and housing cooperatives; no pricing, fee structure or revenue figures are publicly disclosed. Its geographic footprint is regional — concentrated in Geneva and western Switzerland — with global visibility via shortlisting for the 2024 Materia Award. The firm's leadership transitioned in 2024 with Sophia BOUTIT promoted from Directrice Opérationnelle to Administratrice, while Joachim Bourgeois took a co-presidency of SIA Section Genève, institutionalizing its role in the regional engineering community.

Customer relationships cluster around a small set of recurring public and cooperative clients (notably SIG, HBM Fondation, UNIA VIVA SA), with project acquisition routed primarily through architecture-firm partnerships and competition wins rather than transactional sales channels. Marketing is limited to a corporate website, LinkedIn presence and earned-media coverage such as Bilan Magazine.

Name

B+S ENGINEERS

Legal name

B+S ingénieurs SA

Website

https://bourquin-stencek.ch

Company type

Private

Founded year

1953

Operating status

Operating

Headcount range

11–50 employees

Short description

B+S ingénieurs SA is a Geneva-based structural, civil and environmental engineering consultancy founded in 1953, serving public infrastructure, social housing and architectural-competition clients across western Switzerland with award-winning expertise in sustainable construction and material reuse.

Ownership category

akta.pro rank

Product category

Structural Engineering Services

NAICS

Engineering Services (541330), Architectural, Engineering, and Related Services (5413), Commercial and Institutional Building Construction (236220)

SIC

Services-Engineering Services (8711), General Bldg Contractors - Residential Bldgs (1520), General Bldg Contractors - Nonresidential Bldgs (1540)

akta.pro primary industry

Civil & Structural Engineering Consulting (BPAHAIAA)

akta.pro secondary industries

Bridge & Viaduct Construction (IMAFAEAB), Architectural Reconfiguration & Structural Alterations (HSAPAEAB)

Keywords

• Structural engineering services
• Civil engineering design
• Infrastructure construction
• Sustainable construction
• Pedestrian bridge design

Headquarters

HQ city

Geneva

HQ country

Switzerland

HQ region

Europe

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Distribution channels1 record

Marketing channels3 records

Core offering

B+S ingénieurs SA is a Geneva-based structural, civil, and environmental engineering firm that designs engineering solutions for construction projects including pedestrian bridges, vaulted slab structures, social housing renovations (balcony additions), and environmental infrastructure such as Rhône river lagoons. The firm collaborates with architecture firms on competition-winning projects and serves public institutions, social housing foundations, and cooperatives across the Geneva region.

Product overview

B+S ENGINEERS (B+S ingénieurs SA) is a Swiss civil and structural engineering firm based in Geneva. They provide engineering and architectural services for construction projects, including structural design, innovative construction techniques, and architectural competitions. Their portfolio encompasses bridge construction (passerelles), vaulted concrete slabs, residential building projects, and infrastructure development. The company collaborates with architectural firms and participates in public tenders and competitions in the Geneva region.

Differentiator

Problem solved

Functional benefit

Products and services

• Structural Engineering Design for Buildings and Infrastructure Core structural engineering design services for buildings and infrastructure projects in the Geneva region, including innovative structural solutions (e.g., 8cm vaulted slabs) developed for architecture competitions and delivered alongside architectural partners.
• Pedestrian Bridge (Passerelle) Engineering Design and engineering of pedestrian bridges for soft mobility in the Geneva region, including the Passerelle BIT (~34m link to BIT accreditation pavilion with 2.70m usable width) and the Passerelle Pré-Bois installed as part of the Voie Verte d'Agglomération Rive Droite mobility corridor.
• Social Housing Renovation and Balcony Addition Engineering Structural engineering for social housing renovation projects in Geneva, including the addition of 335 prefabricated balconies to occupied HBM buildings without scaffolding (Balcons de la Fontenette, Carouge).
• Environmental Engineering for Rhône River Lagoon Management Environmental and civil engineering services commissioned by SIG to preserve and increase the volume of existing Rhône river lagoons during periodic river lowerings, supporting fish refuge habitat and ecological balance upstream of the Verbois dam.
• Architecture Competition Engineering Support Structural engineering partnership services for architecture competitions, collaborating with firms such as LIN.ROBBE.SEILER Architectes on winning competition entries (e.g., Tours de Hanoï, MEP Morgines office-to-housing reconversion, Dalles Voutées vaulted slabs, Coulouvrenière building Materia Award finalist).

Segments3 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

Eight partnerships are on record, tiered core and minor.

• LIN.ROBBE.SEILER ArchitectescoreStrategic or Co-development PartnerArchitecture firm partner in multiple competition-winning projects including Dalles Voutées (vaulted slabs) and MEP Morgines competition
• HEPIA (Haute école du paysage, d'ingénierie et d'architecture de Genève)coreStrategic or Co-development PartnerAcademic partner in the TERRADEK project, contributing research and expertise in landscape, engineering, and architecture
• TERRABLOCcoreStrategic or Co-development PartnerIndustrial partner in the TERRADEK innovation project focused on sustainable construction materials
• BATJ SAcoreStrategic or Co-development PartnerConstruction partner in the TERRADEK innovation project
• HBM FondationminorStrategic or Co-development PartnerSocial housing foundation and competition organizer for the SIA 142 Bel-Air / Chêne-Bourg urban renewal project
• UNIA VIVA SAminorStrategic or Co-development PartnerCo-organizer of the SIA 142 Bel-Air / Chêne-Bourg architecture competition for social housing redevelopment
• SIG (Services Industriels de Genève)coreStrategic or Co-development PartnerIndustrial services provider commissioning B+S for preserving and increasing volumes of lagoons in the Rhône river periodic lowering operations
• SIA Section GenèveminorStrategic or Co-development PartnerSwiss Society of Engineers and Architects - Geneva Section; Joachim Bourgeois was nominated co-president of the committee

Recent moves6 records

Expansion highlights5 records

Broad incumbents

• Arup: Global multidisciplinary engineering, design, and consulting firm with deep presence in structural and infrastructure work. Operates as a broad incumbent competing for the same large institutional projects as B+S, particularly bridges and sustainability-focused builds.

Regional players

• Setec: Major French multidisciplinary engineering group with structural, civil, and infrastructure expertise. Comparable in service breadth but operates primarily in France, with growing presence in Switzerland.
• Emch+Berger: Swiss engineering firm with broad civil, structural, and environmental capabilities, operating primarily in Switzerland. Comparable regional player with overlapping service lines in civil and structural engineering.

Direct peers

• Dr. Lüchinger+Meyer Bauingenieure: Swiss structural engineering firm with strong emphasis on innovative concrete and sustainable construction, frequently collaborating with leading architects. Highly comparable to B+S on innovative concrete (vaulted slabs) and architecture competition work.
• Werner Sobek: International structural engineering and consulting firm with a strong focus on sustainability, lightweight construction, and material-efficient design. Comparable to B+S on innovation-driven, sustainability-led structural engineering.
• Bollinger + Grohmann: German-based structural engineering consultancy specializing in innovative structural solutions for complex architectural projects and competitions. Highly comparable to B+S in scale, niche focus, and reliance on architecture partnerships to win competition work.
• Ingeni SA: Geneva-based structural and civil engineering consultancy serving the same western Switzerland market. Direct geographic and service overlap with B+S, including public infrastructure and residential projects.
• BG Ingénieurs Conseils: Swiss engineering consultancy offering structural, civil, and environmental engineering across building and infrastructure projects. Closest Swiss-headquartered peer to B+S in services mix and regional footprint.
• Schlaich Bergermann Partner: Renowned structural engineering firm known for innovative and lightweight pedestrian bridges and sustainable design. Directly comparable to B+S on bridge engineering (Passerelle BIT, Passerelle Pré-Bois) and innovation-driven approach.

Emerging players

• T-Engineering: Swiss structural engineering firm focused on innovative and sustainable construction techniques. Smaller, innovation-oriented peer with overlapping expertise in novel concrete and sustainable structural methods.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat3 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/bs-ingenieurs-sa

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 B+S ENGINEERS