Mazoyer Guijarro Avocats

What Mazoyer Guijarro Avocats does

Mazoyer Guijarro Avocats is a Paris-based law firm specializing exclusively in aviation law, operating as a SELARL (Société d'Exercice Libéral à Responsabilité Limitée) from its headquarters at 1 rue Brémontier in the 17th arrondissement. The firm traces its origins to 1992, when it was founded as Chevrier Avocats by Jean Chevrier; following his departure in 2022 the practice was renamed after its two equity partners, Lionel Guijarro and Thierry Mazoyer, who lead the firm today. The team totals approximately eight people, including three associates (Victor Bertin, Adèle Raulin, Paul Leavy) and administrative support.

The firm delivers advisory and litigation services across the full aviation value chain, organized into five primary practice areas: airport law (governance, liability, domaniality, charges, contracts, environment); airline law (passenger claims under EC Regulation 261/2004, Montreal Convention, INAD passengers, freight litigation, competition); aviation insurance (coverage analysis, claims, subrogation); aircraft ownership and leasing (financing, dry/wet lease, maintenance, seizure, registration); and general aviation (sport/recreational aviation, business aviation, flying clubs, drones). Services are delivered as bespoke lawyer-led engagements before civil, criminal, administrative, commercial, and arbitral courts in France and abroad, supplemented by mediation, training, and access to a network of trusted partner experts.

The business model is straightforward professional services: fee-based legal engagements sourced primarily through referrals, reputation, and thought-leadership publishing in specialist journals (Revue Française de Droit Aérien et Spatial; SFDAS committee membership). There is no external investment, no parent company, and no disclosed revenue or pricing. Marketing is limited to the firm's bilingual website (French/English), LinkedIn presence, and articles in aviation law publications.

Name

Mazoyer Guijarro Avocats

Legal name

SELARL Mazoyer Guijarro Avocats

Website

https://mazoyer-guijarro.com

Company type

Private

Founded year

1992

Operating status

Operating

Headcount range

1–10 employees

Short description

Mazoyer Guijarro Avocats is a Paris-based aviation law firm (SELARL) with two equity partners and approximately eight staff, delivering advisory and litigation services to airlines, airports, insurers, aircraft owners, and general aviation clients in France and internationally.

Ownership category

akta.pro rank

Headquarters

HQ city

Paris

HQ country

France

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Marketing or Sales, Others

Revenue model

1. Legal Services: Professional legal services including counsel and litigation for aviation industry clients

Go-to-market motion1 record

Distribution channels1 record

Marketing channels3 records

Core offering

Mazoyer Guijarro Avocats is a Paris-based boutique law firm providing advisory and litigation legal services exclusively to the aviation sector. Its practice covers airports, airlines, aviation insurers, aircraft owners and lessors, and general aviation, with services spanning governance, liability, competition, contracts, environment, regulatory compliance, passenger claims, and alternative dispute resolution in France and internationally.

Product overview

Mazoyer Guijarro Avocats is a law firm specializing in aviation law, offering a comprehensive suite of legal services rather than a technology product. The firm provides advisory and litigation services across multiple practice areas including airport law, airline law, general aviation, aircraft financing, and insurance. Services are delivered through individual lawyer assignments rather than a modular software platform. The firm was founded in 1992 by Jean Chevrier and became Mazoyer Guijarro Avocats in 2022, currently comprising two partners (Lionel GUIJARRO and Thierry MAZOYER) and three associates (Victor BERTIN, Adèle RAULIN, Paul LEAVY) supported by legal assistants.

Differentiator

Problem solved

Functional benefit

Products and services

• Aviation Law Advisory Services
• Aviation Litigation Services
• Airport Legal Services
• Airline Legal Services
• General Aviation Legal Services
• Aircraft Owner and Leasing Legal Services Legal assistance for aircraft owners and leasing parties including financing (finance leasing, purchase with retention of title, mortgage loan), dry/wet lease, maintenance contracts, hidden defects, debt recovery, aircraft seizure, and registration matters.
• Aviation Insurance and Reinsurance Legal Services Legal services for aviation insurers including contract analysis and drafting, claims compensation (hull claims, corporal damages), and subrogated recovery proceedings.
• Alternative Dispute Resolution in Aviation Mediation, conciliation, and amicable settlement services for aviation disputes, particularly for airlines in mass litigation and insurance claims.

Segments5 records

Ideal customer profiles5 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration8 records

Partnerships

One partnership is on record.

• Trusted Partner NetworkminorOthersThe firm has developed relationships with lawyers, aeronautical experts, medical experts, and bailiffs to support clients in France and abroad

Scale indicators2 records

Recent moves6 records

Expansion highlights4 records

Broad incumbents

• Bird & Bird: International firm with a recognized Aviation & Aerospace practice spanning regulatory, financing, and litigation work. Overlaps directly with Mazoyer Guijarro's full-service aviation advisory and litigation offerings.
• Clyde & Co: Global law firm with one of the largest aviation and aerospace insurance practices worldwide. Competes with Mazoyer Guijarro for the aviation-insurer representation work on coverage and subrogated recovery matters.
• Dentons: World's largest global law firm with multi-jurisdictional Aviation and Aerospace capabilities spanning regulatory, finance, and dispute work. Competes for French and European aviation mandates requiring wider geographic coverage than Mazoyer Guijarro provides.
• Stephenson Harwood: International law firm with a Transport and Aviation practice covering airlines, lessors, and airports. Competes with Mazoyer Guijarro for UK and European aviation mandates, especially leasing and regulatory matters.
• Watson Farley & Williams: International law firm with a market-leading aviation finance practice as well as aviation litigation and regulatory capabilities. Comparable across the aircraft finance and broader aviation-law spectrum served by Mazoyer Guijarro.
• Norton Rose Fulbright: Global law firm with a substantial aviation practice covering financing, regulation, disputes, and insurance across Europe. Overlapping practice for the firm's insurer, airline, and aircraft finance clients.

Direct peers

• Gates and Partners: Boutique aviation law firm based in London specializing exclusively in aviation finance, leasing, and regulatory matters. Closest direct competitor for the firm's aircraft financing, leasing, and registration practice.
• Holman Fenwick Willan (HFW): International law firm widely regarded as a top-tier aviation practice with deep EU 261/2004 passenger-claims and aviation liability expertise; associate Paul Leavy trained here. Direct competitor for the firm's core airline-defence and EC 261 work.
• DS Avocats: Paris-headquartered business law firm with a dedicated Transport and Aviation practice covering airlines, airports, and aerospace manufacturers. Closest geographic and practice-area comparable to Mazoyer Guijarro's France-based aviation boutique model.
• Kennedys: UK-headquartered firm with a strong aviation insurance and liability specialty, particularly in airline bodily-injury and hull claims. Highly comparable practice focus on the insurance and litigation work that Mazoyer Guijarro performs for aviation insurers.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat3 records

Key risks6 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/mazoyer-guijarro-avocats

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

Profiles5 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 Mazoyer Guijarro Avocats