OASIIS

What OASIIS does

OASIIS is a French privately held environmental engineering consultancy (SAS, registered capital €285,131.25) founded in 1989 and headquartered in Aubagne near Marseille, with regional agencies in Paris, Strasbourg, and Monaco. The firm specialises in environmental performance consulting for buildings, providing services across three core lines: BET Environnement (technical environmental studies), AMO Qualité Environnementale (environmental project management assistance), and Commissioning. Its work covers dynamic thermal simulation (STD), dynamic energy simulation (SED), life-cycle assessment (ACV), daylight and aeraulic/CFD studies, carbon footprint assessment (Bilan Carbone), and measurement & verification plans (PMV), alongside certification delivery under HQE, BREEAM, LEED, BBCA, BDM, PassivHaus, and E+C- frameworks, with RE2020 compliance as a regulatory anchor.

The company serves a B2B client base of building owners, developers, architects, contractors, and public authorities across healthcare, education, sports & leisure, hospitality, residential, office/commercial, and government/institutional sectors in France and internationally (Monaco, New Caledonia, Benin). Go-to-market is sales-led, relying on deep relationships with 200+ architectural firms, direct enterprise engagement on complex projects, and public-tender participation; revenue is generated through project-based professional services fees.

Notable commercial outcomes include the first Cradle to Cradle certified commercial centre in France (Centre Commercial Vélodrome Marseille, 28,000 m², 2018), the first HQE certified public building in New Caledonia (Médipôle de Koutio, 88,000 m², €322M HT, 2016), and PassivHaus-certified healthcare facilities (Nouvel Hôpital de Lens €143M HT, EHPAD Les Cordeliers). The firm participates in the SYMBIO2 consortium led by XTU, awarded €4.8M FUI 15 funding for bio-facade R&D, signalling a longer-term move into circular-economy and bio-based construction advisory.

Name

OASIIS

Legal name

OASIIS S.A.S.

Website

https://oasiis.fr

Company type

Private

Founded year

1989

Operating status

Operating

Headcount range

11–50 employees

Short description

OASIIS is a French environmental engineering consultancy founded in 1989 that delivers thermal simulation, life-cycle assessment, certification, and commissioning services for buildings across healthcare, education, commercial, residential, and public-sector clients in France and internationally.

Ownership category

akta.pro rank

Product category

Environmental Engineering Consulting

NAICS

Environmental Consulting Services (54162), Architectural, Engineering, and Related Services (5413)

SIC

Services-Engineering Services (8711)

akta.pro primary industry

EHS Management Systems & ISO Consulting (ISO 14001/45001) (BPAHAJAF)

akta.pro secondary industries

Environmental Impact Assessment (EIA) & Due Diligence (BPAHAJAB), Compliance Obligations Management (Permits-to-Controls Mapping) (EUAHAIAK)

Keywords

• Environmental building consulting
• Sustainable construction services
• Building performance certification
• Thermal simulation consulting
• Building commissioning services

Headquarters

HQ city

Paris

HQ country

France

HQ region

Europe

Offices4 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Environmental Consulting Services: Professional consulting fees for environmental performance studies, certifications, and commissioning services on construction projects. Revenue generated through project-based engagements with architects, developers, and public authorities.

Go-to-market motion2 records

Distribution channels4 records

Marketing channels4 records

Core offering

OASIIS is a French environmental performance consulting firm that delivers BET Environnement (environmental engineering studies), AMO Qualit\u00e9 Environnementale (project management assistance for environmental certifications), and Commissionnement (building commissioning) services. The firm helps architects, developers, and public authorities achieve environmental certifications (HQE, BREEAM, LEED, BBCA, BDM, PassivHaus, E+C-, RE2020) and optimize energy efficiency, carbon footprint, and occupant comfort across healthcare, education, commercial, hospitality, sports, and public building projects.

Product overview

OASIIS is an environmental performance consulting firm (bureau d'expertise en performance environnementale) providing comprehensive consulting services for sustainable building projects in France. The company operates across multiple service lines: BET Environnement for technical environmental engineering studies, AMO Qualité Environnementale for environmental project management assistance, and Commissionnement services for building commissioning. OASIIS specializes in helping clients obtain environmental certifications including HQE, BREEAM, LEED, BBCA, BDM, and RE2020. The firm serves diverse sectors such as healthcare, education, sports facilities, hotels, housing, and public buildings, offering studies including thermal dynamic simulations, energy simulations, daylight studies, aeraulic studies (CFD), and life cycle assessments (ACV).

Differentiator

Problem solved

Functional benefit

Products and services

• BET Environnement Environmental engineering consulting providing technical studies and analysis for construction projects, including thermal dynamic simulations (STD), energy studies (SED), daylight studies (FLJ/ALJ), aeraulic studies (CFD), and life cycle assessments (ACV). Targeted at architects, developers, and public authorities.
• AMO Qualit\u00e9 Environnementale Project management assistance for environmental quality, guiding clients through certification processes including HQE, BREEAM, LEED, BBCA, BDM, PassivHaus, E+C-, and RE2020 compliance. Targeted at building owners, developers, and project teams.
• Commissionnement (Commissioning) Building commissioning services ensuring building systems perform as designed, from pre-conception through construction, reception, and operational phases. Targeted at developers, public authorities, and institutional building owners.
• Expertises Sectorielles Specialized environmental consulting across sectors including healthcare, education, sports facilities, hotels, housing, and public buildings, adapting technical approaches to each sector's specific requirements. Targeted at sector-specific clients.

Quantifiable outcome

• First Cradle to Cradle certified commercial center in France (Centre Commercial Vélodrome Marseille)
• +3 more outcomes

Named customers20 records

Segments7 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature8 records

Partnerships

Ten partnerships are on record, tiered major, core and innovative.

• CIRMAD GRAND SUDmajorImplementation/ SI/ Consulting Partner · 1 January 2018Collaboration with CIRMAD on the Centre Commercial Vélodrome Marseille project, achieving the first Cradle to Cradle certification for a commercial center in France.
• Michel BEAUVAIS Architecte - PariscoreStrategic or Co-development Partner · 1 January 2016Partnership on the Médipôle de Koutio project in New Caledonia - the first HQE certified public building in the territory, demonstrating successful international collaboration on complex healthcare facilities.
• MBA Michel BEAUVAIS AssociéscoreStrategic or Co-development PartnerLong-standing partnership spanning over 20 years with Michel BEAUVAIS architect on hospital projects across France, Africa, Caribbean, and Pacific territories. Together they have designed more than 20 reference hospital establishments, combining architectural vision with environmental engineering expertise.
• Christian BIECHER ArchitectescoreStrategic or Co-development PartnerOngoing collaboration on major urban development projects including the Ordener Poissonniers project in Paris 18th arrondissement.
• Multiple French Architectural FirmscoreStrategic or Co-development PartnerPartnerships with over 200 French and international architectural firms including Herzog & De Meuron, Snohetta, Rudy Ricciotti, Wilmotte & Associés, Baumschlager Eberle, KCAP Rotterdam, and many others for integrated environmental consulting on construction projects.
• EIFFAGE ConstructionmajorImplementation/ SI/ Consulting PartnerPartnership with EIFFAGE on multiple projects including the Tribunal Administratif Montreuil and Grand Site Administration Centrale Malakoff.
• FAYAT BâtimentmajorImplementation/ SI/ Consulting PartnerPartnership with FAYAT Bâtiment on the Musée du Grand Siècle Saint-Cloud project (MPGP-CREM) and Pole Femme Mere Enfant CHU Pau.
• VINCI Construction FrancemajorImplementation/ SI/ Consulting PartnerPartnership with VINCI Construction France on the Hôtel des Polices de Nice project (180M€ HT).
• BENOY (Londres)majorStrategic or Co-development PartnerInternational partnership with BENOY architects on the Centre Commercial Vélodrome Marseille project.
• SYMBIO2 ConsortiuminnovativeStrategic or Co-development PartnerParticipation in the SymBIO2 consortium led by XTU, awarded 4.8M€ FUI 15 funding including 1.75M€ subsidies for biofacade development project of 200m².

Scale indicators3 records

Recent moves6 records

Expansion highlights5 records

Broad incumbents

• Egis: Large French engineering group with broad environmental, sustainability, and building performance capabilities across transport, infrastructure, and buildings. Competes with OASIIS for large public-sector and developer mandates but as part of a much wider portfolio.
• setec: Independent French engineering group whose Elan subsidiary delivers environmental consulting for buildings. A broad incumbent competitor to OASIIS with significantly larger multidisciplinary capabilities and international footprint.
• Bureau Veritas: Global testing, inspection, and certification giant active in building environmental certification (HQE, BREEAM, LEED). Competes with OASIIS on certification mandates at much larger scale, particularly for public and commercial real estate clients.
• Artelia: Major French engineering and project management group with a sustainability and environmental performance practice. Competes for complex environmental consulting mandates on construction projects, though operating at much greater scale across multiple disciplines.

Direct peers

• Burgeap: French environmental engineering consultancy (part of Equans) providing environmental site assessments, regulatory compliance, and sustainable building services. Comparable to OASIIS in environmental consulting scope for infrastructure and building projects.
• TERAO: French engineering consultancy specializing in energy and environmental performance of buildings, with comparable services in HQE, BREEAM, LEED, RE2020, thermal simulation, and lifecycle assessment. Direct peer to OASIIS in building environmental consulting across France.
• Franck Boutté Consultants: French environmental and energy engineering consultancy specialized in sustainable building design, bioclimatic architecture, and certification support. Direct competitor to OASIIS in environmental performance consulting for construction projects.
• Ginger (Groupe Ginger): Major French environmental and geotechnical engineering group offering building environmental studies, certification support, and site diagnostics. Overlaps directly with OASIIS on environmental performance consulting for construction projects in France.
• Elan (setec group): Environmental and sustainable building consultancy within the setec engineering group, providing HQE, BREEAM, and energy performance consulting for buildings. Closely comparable to OASIIS in scope and French market focus.

Emerging players

• EODD Ingénierie: French environmental engineering consultancy focused on sustainable construction, environmental assessments, and building performance. Comparable to OASIIS in service scope, with growing presence in certification and lifecycle assessment.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks5 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/oasiis
• Xx.com/oasiis_br

Compliance8 records

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 OASIIS