Geodynamics & Structure

What Geodynamics & Structure does

Géodynamique & Structure (GDS) is a French Bureau d'Ingénieurs Conseils (engineering consulting firm) founded in 1981 and headquartered in Montrouge, in the Paris metropolitan area. The firm specializes in analyzing the behavior of soils, structures, equipment, and their interactions under cyclic (swell, vibration), dynamic (seismic, explosion), and thermomechanical (pressure, temperature) loading conditions. GDS serves enterprise and government clients across nuclear energy, petrochemical, large-scale infrastructure (bridges, high-rise buildings), maritime/underground works, and defense sectors. Its marquee engagements include the foundation system design for the 2,252m Rion-Antirion cable-stayed bridge in Greece, seismic studies for EDF's EPR Flamanville nuclear plant, and ongoing technical assistance to CEA on the Jules Horowitz Reactor and Laser Megajoule facility.

The firm's technical platform combines proprietary software developed since 1992 (BARDYN for dam dynamic stability, FONDYN for seismic stability of shallow foundations, BEARCAP98 for bearing capacity on reinforced soil), advanced macro-element modeling for soil-structure interaction with material and geometrical nonlinearities, and physical centrifuge testing methodology (up to 100g). The team consists of approximately 25 collaborators delivering project-based professional services including design studies, diagnostic assessments, seismic vulnerability analysis, structural reinforcement design, vibration analysis, and R&D participation in European programs (SERIES, DEBATE, DARE). GDS holds ISO 9001 certification and operates without external capital as a privately-held, founder-led firm (CEO Pierre-Alain Nazé also serves as President of the AFPS Scientific and Technical Committee).

GDS generates revenue through project-based consulting fees on complex, multi-year infrastructure engagements. Pricing is not publicly disclosed and contracts are custom-scoped based on project complexity, duration, and technical requirements. The firm has delivered over 2,500 references across 5 continents since 1981, with reported revenue of approximately €4 million in 2016. The go-to-market motion is enterprise field sales with direct client relationships (EDF, CEA, Total, Vinci, Bouygues TP, French Ministry of Defense), supplemented by thought leadership through scientific publications and participation in seismic engineering standards-setting.

Name

Geodynamics & Structure

Legal name

Geodynamique et Structure

Website

https://geodynamique.com

Company type

Private

Founded year

1981

Operating status

Operating

Headcount range

11–50 employees

Short description

Géodynamique & Structure is a French engineering consultancy founded in 1981 that delivers seismic and geotechnical expertise for nuclear, petrochemical, infrastructure, maritime, and defense projects. The 25-person firm serves enterprise and government clients worldwide using proprietary software, advanced numerical modeling, and centrifuge testing.

Ownership category

akta.pro rank

NAICS

Engineering Services (54133), Architectural, Engineering, and Related Services (5413)

SIC

Services-Engineering Services (8711)

akta.pro primary industry

Geotechnical Design, Engineering & Consulting (Analysis, Design, Peer Review) (IMAFAOAK)

akta.pro secondary industries

Geotechnical & Subsurface Engineering Consulting (BPAHAIAB), Civil & Structural Engineering Consulting (BPAHAIAA), Shallow Foundations & Ground Support (Footings, Rafts, Ground Beams) (IMAFAOAB)

Keywords

• Seismic engineering consulting
• Geotechnical engineering services
• Soil-structure interaction analysis
• Earthquake engineering consulting
• Nuclear civil engineering

Headquarters

HQ city

Montrouge

HQ country

France

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Engineering Consulting Services: Professional consulting services for civil engineering projects including design studies, diagnostic assessments, seismic reinforcements, technical expertise, and R&D services. Revenue is project-based and derived from consulting fees for engineering analysis and design services on major infrastructure projects.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels3 records

Core offering

Géodynamique & Structure is a Bureau d'Ingénieurs Conseils (specialized engineering consultancy) that analyzes the behavior of soils, structures, equipment, and their interactions under cyclic (swell, vibration), dynamic (seismic, explosion), and thermomechanical (pressure, temperature) loading conditions. The firm delivers seismic design, geotechnical studies, structural diagnosis and reinforcement, equipment qualification, and nuclear civil engineering services for large-scale infrastructure projects globally.

Product overview

Geodynamics & Structure operates as an engineering consulting firm offering specialized services in seismic and geotechnical engineering rather than a software product company. The portfolio consists of core service lines in Soil Dynamics, Structure Dynamics, Equipment Dynamics, and Nuclear Civil Engineering, complemented by specialized offerings in pressure containment structure design, vibration analysis, and seismic hazard assessment. These services are delivered through project-based consulting engagements including design studies, diagnosis and reinforcements, technical expertise, and active research and development participation in national and European research programs. The company maintains ISO 9001 certification and serves clients across the nuclear, petrochemical, maritime, and defense sectors worldwide.

Differentiator

Problem solved

Functional benefit

Quantifiable outcome

• 2500+ completed references on 5 continents since 1981
• +1 more outcomes

Named customers11 records

Segments5 records

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

Four partnerships are on record, tiered core and minor.

• EQE ConsultingcoreStrategic or Co-development PartnerStrategic partnership agreement between GDS and EQE Consulting for seismic engineering studies, particularly in the nuclear field. GDS personnel involved in this partnership previously conducted EQE studies in nuclear domain from 1990-2000.
• CEA (Commissariat à l'énergie atomique et aux énergies alternatives)coreStrategic or Co-development PartnerLong-standing collaboration on French nuclear program including Laser Megajoule project, Jules Horowitz Reactor, and ITER project. GDS provides seismic engineering expertise for CEA experimental facilities.
• European Research Consortium (SERIES, DEBATE, DARE projects)minorStrategic or Co-development PartnerParticipation in European FP7 research projects including SERIES (Seismic Engineering Research Infrastructures for European Synergies), DEBATE (Development of broadband accelerograms for engineers), and DARE (Soil-Foundation-Structure Systems beyond conventional seismic thresholds).
• AFPS (Association Française du Génie Parasismique)coreStrategic or Co-development PartnerCompany CEO Pierre-Alain Nazé serves as President of the AFPS Scientific and Technical Committee. AFPS is the French Association for Earthquake Engineering, contributing to seismic design standards and guidelines.

Scale indicators4 records

Recent moves6 records

Expansion highlights4 records

Direct peers

• Setec: French independent engineering group with civil, structural, and geotechnical capabilities serving nuclear, transportation, and major infrastructure clients in overlapping French and international markets.
• Geotechnical Consulting Group (GCG): UK-based specialist geotechnical consultancy focused on complex soil-structure interaction and seismic engineering — a close functional peer in scale, technical specialization, and project types.
• Egis: Major French engineering consultancy with deep nuclear, transportation, and infrastructure practices offering geotechnical and structural engineering services in the same client ecosystem (EDF, CEA, French ministries) as GDS.
• EQE International (now part of ABS Group): Seismic engineering consultancy historically focused on nuclear and industrial facilities; GDS already has a strategic partnership with EQE Consulting, making them a direct peer for nuclear seismic studies.

Broad incumbents

• Arup: International engineering consultancy with renowned seismic and geotechnical expertise and global delivery capacity — competes on marquee bridge, nuclear, and high-rise projects where GDS also bids.
• Mott MacDonald: Global engineering consultancy with established geotechnical and earthquake engineering practices serving transportation, energy, and buildings sectors — comparable technical depth at much larger scale.
• Fugro: Global geotechnical and subsurface data services firm offering site characterization, geotechnical engineering, and seismic consulting across offshore, infrastructure, and energy markets — overlapping with GDS's soil dynamics and foundation design work but at vastly greater scale.
• WSP Global (including Golder): Global professional services firm with substantial earth and environment practice via the former Golder Associates — offers geotechnical and seismic engineering at scale across energy, infrastructure, and mining sectors where GDS also operates.
• Jacobs Engineering: Large-scale engineering services firm with a critical mission solutions division serving nuclear and infrastructure clients worldwide — competes with GDS on seismic and structural safety projects for energy and government clients.
• Tractebel (Engie): Large engineering consultancy with a dedicated nuclear and infrastructure division providing seismic and structural engineering services — competing for similar nuclear and energy projects across European markets.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/geodynamique-structure

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

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 Geodynamics & Structure