CELIGEO is a French geotechnical engineering consultancy specialising in ground investigations, soil studies and geotechnical risk assessment for construction, infrastructure and building projects. The company is based in Lorette, in the Loire department, and operates primarily across the Auvergne-Rhône-Alpes region, with assignments carried out beyond this area when required by clients.


CELIGEO supports private individuals, companies, developers, contractors, local authorities and project teams involved in construction, infrastructure and building projects. Its core purpose is to characterise ground conditions, identify geotechnical risks and provide practical recommendations to support safe, cost-effective and durable construction solutions.

The business brings together geotechnical engineers and experienced field teams, supported by site investigation equipment and in-house laboratory testing capabilities. CELIGEO’s approach combines desk studies, in situ investigations, drilling, testing, interpretation and written reporting to define appropriate foundation, lower-ground-floor and construction recommendations.

CELIGEO works across the full range of standard French geotechnical missions under NF P 94-500, from early-stage preliminary studies through to design, execution support, construction supervision and diagnostic assignments. Its expertise is particularly relevant to foundation design, infiltration studies, stormwater management, autonomous sanitation studies, mining risk assessments, clay shrink–swell risk, structural cracking diagnostics and construction-phase geotechnical control.

CELIGEO’s geotechnical expertise provides a strong operational link with environmental engineering and contaminated land services. Its ground investigation capabilities, knowledge of soil behaviour, drilling resources and understanding of subsurface constraints are directly complementary to environmental site assessment, contaminated land diagnostics, remediation design and redevelopment projects.

Within RSK France, this creates a clear opportunity to combine geotechnical investigations with environmental and contaminated land expertise, particularly for brownfield redevelopment, industrial sites, infrastructure schemes, urban regeneration projects and sites requiring both ground-risk and pollution-risk assessment. CELIGEO can therefore support integrated project delivery by contributing high-quality subsurface data, while RSK France brings additional capabilities in contaminated land assessment, remediation engineering, regulatory support and environmental risk management.

CELIGEO provides a broad range of geotechnical and ground investigation services, including:

  • geotechnical studies under G1 to G5 missions
  • ground investigations, drilling and in situ testing
  • laboratory geotechnical testing
  • infiltration and stormwater management studies
  • autonomous sanitation soil studies
  • mining and clay shrink–swell risk assessments
  • diagnostic studies for cracking, claims and geotechnical disorders
  • construction-phase geotechnical monitoring and supervision, including G3 and G4 assignments
  • technical support for projects where geotechnical constraints interact with environmental, redevelopment or contaminated land issues.

CELIGEO contributes to a variety of project types, including residential developments, commercial buildings, industrial facilities, infrastructure schemes, brownfield redevelopment projects and local authority schemes. Its work typically supports project owners, contractors, architects, engineering teams and public-sector stakeholders in identifying geotechnical risks early and managing them effectively throughout project delivery.

Overall, CELIGEO is a technically focused, responsive and practical geotechnical consultancy, with strong regional expertise, recognised know-how in mining- and clay-related ground risks and a commitment to providing tailored, reliable and cost-effective engineering recommendations for each project.

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RSK Group acquires French geotechnical engineering consultancy CELIGEO news

RSK Group acquires French geotechnical engineering consultancy CELIGEO

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