Diamantis & Partners

What Diamantis & Partners does

Diamantis & Partners is a Paris-headquartered boutique international law firm organized as an AARPI under French law, founded in 2011 to serve energy, infrastructure, and public international law matters across Africa and emerging markets. The firm operates through three independent offices — Paris (international headquarters), Kinshasa in the Democratic Republic of Congo, and Nouakchott in Mauritania — combining French legal pedigree with on-the-ground representation before local courts and regulators (including GUCE in the DRC). Its practice spans six core areas (Project, Infrastructure and Concessions; Arbitration and Dispute Settlement; Public International Law; Policy, Regulatory and Public Law; M&A, Corporate Law and Private Equity; and Commercial Contracts) and five sector specializations (Oil & Gas, Electricity, Ports/Airports/Rail, Mining and Natural Resources, and Telecom, Banking and Insurance).

The firm's core "product" is bespoke legal counsel delivered by a partner-heavy team of 9 staff, including five partners (Eric Diamantis, Jemal Taleb, Pierre Ferroud, Julien Barba, Jennifer Chollet), a Senior Legal Counsel (Pierre Bodeau Livinec), a Counsel (Jean-Louis Bruguière), and three associates. Senior credentials include representation of Mauritania in an ICSID arbitration, counsel roles at the ICJ, PCA, ICC, and UNCITRAL, prior in-house experience at TotalEnergies' natural gas and LNG business unit, and a former First Vice-President of the Paris Tribunal de Grande Instance. Multilingual coverage (French, English, Arabic, Lingala, Spanish, Italian, German, Macedonian, Portuguese) underwrites the cross-border mandate set.

The business model is professional services billing — hourly rates, fixed fees, or success fees — against named enterprise and government counterparties including TotalEnergies, Petronas, the Government of Chad, SMH (Société Mauritanienne des Hydrocarbures), Glencore, Air France, Addax Energy, Oryx Energy, and Wingas. Go-to-market is enterprise field sales through direct engagement, referrals, and industry reputation rather than volume marketing, with a professional website and modest social media presence (LinkedIn, Facebook, Twitter) supporting thought-leadership positioning. No proprietary technology platform, no external funding, and no parent company are indicated; the firm is privately held by its partners.

Name

Diamantis & Partners

Legal name

Diamantis & Partners AARPI

Website

https://diamantispartners.com

Company type

Private

Operating status

Operating

Headcount range

1–10 employees

Short description

Diamantis & Partners is a Paris-headquartered boutique international law firm specializing in energy, infrastructure, and public international law across Africa, with offices in Kinshasa (DRC) and Nouakchott (Mauritania), serving corporates, governments, and investors.

Ownership category

akta.pro rank

Headquarters

HQ city

Paris

HQ country

France

HQ region

Europe

Offices3 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Legal Advisory Services: Professional legal services billed on hourly rates, fixed fees for specific deliverables, or success fees for certain transactional and dispute resolution matters. Revenue derived from serving corporate clients, governments, and investors in complex cross-border transactions and international arbitration.

Go-to-market motion2 records

Distribution channels1 record

Marketing channels4 records

Core offering

Diamantis & Partners is an international law firm providing specialized legal services for energy, infrastructure, mining, and natural resources projects in Africa and emerging markets. The firm delivers full-service legal counsel across the project lifecycle—from bidding and development through financial close and operation—combined with international arbitration, regulatory advisory, M&A, and public international law services. Practice areas include Project Infrastructure & Concessions, Arbitration & Dispute Settlement, Public International Law, Policy/Regulatory/Public Law, M&A & Private Equity, and Commercial Contracts, with sector specializations in Oil & Gas, Electricity, Ports/Airports/Rail, Mining, and Telecom/Banking/Insurance.

Product overview

Diamantis & Partners is an international law firm providing legal services organized as a unified offering across six core practice areas and five specialized sectors. The practice areas include Project Infrastructure and Concessions, Arbitration and Dispute Settlement, Public International Law, Policy Regulatory and Public Law, M&A Corporate Law and Private Equity, and Commercial Contracts. The sector specializations cover Oil & Gas, Electricity, Ports Airports and Rail, Mining and Natural Resources, and Telecom Banking and Insurance. The firm operates through three independent offices in Paris, Kinshasa (DRC), and Nouakchott (Mauritania) to provide local expertise with international standards across Africa and emerging markets.

Differentiator

Problem solved

Functional benefit

Products and services

• Project, Infrastructure and Concessions

Named customers9 records

Segments1 record

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Scale indicators2 records

Recent moves8 records

Expansion highlights4 records

Broad incumbents

• Ashurst: Global law firm with a focus on energy, infrastructure, and resources, including significant Africa-related mandates. Competes for project finance, M&A, and dispute work involving African oil & gas and infrastructure assets.
• Norton Rose Fulbright: Global elite law firm with one of the largest dedicated Africa practices and deep oil & gas, mining, and infrastructure benches. Overlaps with Diamantis on cross-border African energy M&A, project finance, and arbitration, but with materially larger scale and broader geographic coverage.
• Freshfields: Global elite with a strong energy and international arbitration practice, active on high-value African disputes and project work. Comparable on the arbitration and public international law overlap with Diamantis.
• White & Case: Global law firm with a strong project finance and energy practice, active on major African LNG, pipeline, and infrastructure transactions. Competes head-to-head with Diamantis for mandates from TotalEnergies, Petronas-class clients, and African sovereigns.
• Herbert Smith Freehills: Global firm with significant energy, resources, and infrastructure practices and a growing Africa footprint. Direct competitor on LNG, mining, and investor-state arbitration mandates across the same jurisdictions.
• Hogan Lovells: Global firm with a long-standing Africa practice, strong oil & gas and mining client base, and arbitration capabilities. Overlaps with Diamantis on cross-border Francophone Africa mandates.

Direct peers

• CastaldiPartners: Paris-based boutique international law firm with a focus on energy, infrastructure, and emerging markets, particularly in Africa and the Middle East. Similar size, sector focus, and client profile to Diamantis, making it the closest comparable peer.

Regional players

• Bowmans: Leading African law firm with offices across the continent, including Francophone Africa. Comparable on energy, mining, and infrastructure mandates in the same geographies, though larger and with broader sector coverage than Diamantis.
• Webber Wentzel: Major South Africa-headquartered law firm with deep African energy, mining, and infrastructure practices. Comparable on cross-border African transactions and disputes, primarily competing in Anglophone Africa but expanding in Francophone markets.
• ENSafrica: Largest law firm in Africa with offices across multiple jurisdictions, including Francophone Africa. Provides comparable services in oil & gas, mining, project finance, and dispute resolution.

Market position

Strengths4 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights6 records

Customer concentration

• Facebookfacebook.com/diamantispartners
• LinkedInlinkedin.com/company/diamantispartners

Revenue estimate

Valuation estimate

Number of profiles

Profiles10 records

Subsidiaries2 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 Diamantis & Partners