8 Advisory
Independent European advisory firm providing financial due diligence, structuring, modelling and financing support for infrastructure and energy projects.
- Highest 2026 tier: Tier II
- Independent consulting and transaction-advisory firm
- Real Assets & Infrastructure Advisory
Overview
Eight Advisory, presented in the ranking as 8 Advisory, is an independent consulting firm founded in 2009. Its Infrastructure, Energy & Project Finance team supports investment funds, companies and public authorities.
The practice covers financing, modelling, transaction consulting and model reviews across energy transition, transport, telecommunications, social infrastructure and public utilities.
8 Advisory is included in one 2026 Advisory Ranking category. The highest recorded classification is Tier II.
Firm facts
| Legal name | Eight Advisory SAS |
| Founded | 2009 |
| Firm type | Independent consulting and transaction-advisory firm |
| Principal offices | Paris, London, Brussels, Frankfurt, Munich, Hamburg, Zurich, Amsterdam, Cologne, Madrid, Milan, New York |
| Primary focus | Infrastructure, energy and project finance |
| Senior infrastructure leadership | Lionnel Gérard |
| Highest 2026 Advisory Ranking tier | Tier II |
Principal activities
Financial due diligence
Buy-side, sell-side and refinancing-related financial reviews.
Financial structuring and debt advisory
Support with financing and refinancing, including coordination with lenders.
Complex financial modelling
Model construction, review and analytical support for projects and bids.
8 Advisory works with clients on assignments that may combine strategy, specialist analysis, implementation support and organizational adoption. The precise scope depends on the mandate, sector, geography and client requirements.
Sector and mandate coverage
Sector coverage
- Energy and renewables
- Telecommunications
- Transport
- Social infrastructure
- Public utilities
- Capital-intensive projects
Transaction and mandate types
- Buy-side diligence
- Sell-side diligence
- Debt financing
- Refinancing
- Public and private tenders
- Model reviews
Market position
8 Advisory is positioned as a independent consulting and transaction-advisory firm. Its relevant market is defined more by specialist capabilities and transaction experience than by balance-sheet size alone.
Distinctive focus: Multidisciplinary transaction support centered on project finance, modelling and European infrastructure.
Competitive context
8 Advisory competes with advisers whose services overlap in infrastructure sectors, client types, geographies and transaction structures. Relevant competitors can include investment banks, project-finance boutiques, transaction consultants and technical infrastructure advisers.
Comparable firms are selected according to overlap in business model, client segment, service coverage, geographic activity and mandate profile. Inclusion does not imply equivalence in scale, ranking or market position.
Leadership
| Person | Current position | Institutional background |
|---|---|---|
| Lionnel Gérard | Partner | Transaction Services and Infrastructure & Project Finance |
| Guillaume Catoire | Partner | Transaction Services and Infrastructure & Project Finance |
| Jean-Eden Domingo | Partner | Infrastructure & Project Finance |
Leadership information reflects the public sources reviewed for this profile. View the firm’s website ↗
Corporate and regulatory information
Eight Advisory provides consulting and transaction services through national member entities. The applicable legal entity and professional regulation depend on the office and engagement.
View registered-entity details
| Principal legal entity | Eight Advisory SAS |
| Brand used in ranking | 8 Advisory |
| Regulatory status | Varies by entity and service |
| Primary jurisdiction | France |
Principal offices
- Paris
- London
- Brussels
- Frankfurt
- Munich
- Hamburg
- Zurich
- Amsterdam
- Cologne
- Madrid
- Milan
- New York
Rankings and recognition
Ranking inclusion is editorially determined. The existence or maintenance of a Wiki profile does not influence ranking eligibility, tier or position.
Related Economy analysis
Selected Economy Markets articles providing context for the firm’s advisory environment:
- Middle-Market Private Equity: Returns, Scale and Manager Selection
- Private Equity Technology Due Diligence in the AI Era
- The Silent Reshuffle of the Advisory Market
Related institutions and subjects
Sources and data transparency
The profile is based on the following publicly available institutional, regulatory and editorial sources:
- Infrastructure, Energy & Project Finance — services, sectors, practice data and leaders.
- Locations — office network.
- Advisory Ranking — Top 30 Real Assets & Infrastructure Advisory 2026 — inclusion and tier classification.
