Kalliopé > Paris, France > Firm Profile

4 rue du Général Foy
75008 Paris

France > Environment Tier 3


Practice head(s):


‘Jocelyn Duval’s technicality and responsiveness stand out.’

‘Jocelyn Duval provides us with a valuable service, with great responsiveness, whether it is providing practical advice or a deep and comprehensive analysis.’

Key clients














The firm: 

Kalliopé is an independent and entrepreneurial law firm, founded in 2008, active in the main areas of private and public business law, both in consulting and litigation. Kalliopé has 21 lawyers (9 partners and 12 associates) with experience in a high-level environment. With a responsive team able to adapt to the needs of each client, Kalliopé offers global legal solutions in terms of:

– Corporate, mergers & acquisitions , investment

– Real estate & urbanism

– Environment & sustainable development

– Public economic law / public contracts

– Financing / regulated funds

– Litigation & arbitration

– Firms in difficulty & restructuring

– Commercial contracts

–  RGPD compliance

– Food law , distribution & competition law

– Labor Law

Kalliopé’s partners have all pursued their professional careers in leading law firms. They have acquired a solid experience around often sensitive and complex files, motivated by the desire to always meet at best the requirements and interests of a varied clientele.

They also act as experts in professional conferences or colloquia and in training institutes. They publish academic articles in their areas of expertise.

Areas of practice :

Environment and sustainable development: Classified facilities, Polluted sites and grounds, Litigation, Renewable energies, Sustainable development, Wastes.

Key clients : Vinci Airports, AXA IM, Europipe, Vinci Concessions, Neoen, Novenergia, WEB Energie du Vent

Contacts : Jocelyn Duval – jduval@kalliope-law.com | Lorenzo Balzano – lbalzano@kalliope-law.com

Real estate, construction and town planning: Property development-building, Construction-Real estate transactions, Litigation- Development Town-planning authorisations, Project management.

Key clients : AXA IM, Swiss Life REIM, Nexity, Caisse des Dépôts et Consignations, Vinci Airports, SERCIB, NEOEN, Groupe Chevrillon

Contacts : Lorenzo Balzano – lbalzano@kalliope-law.com | Jocelyn Duval – jduval@kalliope-law.com

Corporate, mergers & acquisitions, private equity: Corporate, mergers & acquisition, strategic partnership, private equity, acquisition financing.

Key clients : Caisse des Dépôts et Consignations, Galiena Capital, Novenergia

Contact: Tanguy d’Everlange : tderverlange@kalliope-law.com

Banking and finance, regulated and investment funds: Project financing, structured financing, investment funds.

Key clients: Swiss Life REIM, Rockspring, Aerium, Novenergia

Contact: Rodolphe Cavroy: rcavroy@kalliope-law.com

Public business law,  procurements: Economic interventionism, Regulatory, Public Domain, Procurement & public contracts, Public Private partnership).

Key clients : Région Ile de France, Vinci Concessions, Idex

Contact: Jocelyn Duval – jduval@kalliope-law.com

Litigation, arbitration and commercial contracts: Pre-contentious phase, mediation, business law litigation, arbitrage, white collar crime, distribution contracts, branch contracts).

Key clients: Idex, Areva, Eco Mobilier

Contact: Nicolas Contis – ncontis@kalliope-law.com; Karen Leclerc – kleclerc@kalliope-law.com; Julie Gayrard – jgayrard@kalliope-law.com

Insolvency proceedings and restructuring: Pre-insolvency proceedings, judicial proceedings, takeover of distressed companies.

Contact: Karen Leclerc – kleclerc@kalliope-law.com

GDPR compliance: Assisting companies in their compliance process regarding GDPR.

Key clients: Synthos , Choice Hotels France

Contact: Karen Leclerc – kleclerc@kalliope-law.com

Food law, distribution and competition law:  general terms & conditions, pricing policy,  franchise agreement , distribution contracts, litigation  with  food products regulatory authorities.

Key clients : Distributors, supplier, manufacturer, producer,

Contact : Julie Gayrard – jgayrard@kalliope-law.com

Labor and employment  law:   Expertise in individual employment relationships and  collective relations,  as well as social security law, both in counseling and litigation, for clients from all economic sectors.

Contact : Florence Coussau – fcoussau@kalliope-law.com



Real estate & Town planning Lorenzo Balzanolbalzano@kalliope-law.com
Real estate & Town planning Jocelyn Duvaljduval@kalliope-law.com
Restructuring & Insolvency Karen Leclerckleclerc@kalliope-law.com
Public business law and Public contracts Jocelyn Duvaljduval@kalliope-law.com
Environment Jocelyn Duvaljduval@kalliope-law.com
Environment Lorenzo Balzanolbalzano@kalliope-law.com
Renewable energies Jocelyn Duvaljduval@kalliope-law.com
Renewable energies Tanguy d'Everlangetdeverlange@kalliope-law.com
Banking and finance Rodolphe Cavroyrcavroy@kalliope-law.com
Commercial contracts Nicolas Contisncontis@kalliope-law.com
Commercial contracts Karen Leclerckleclerc@kalliope-law.com
Corporate law Tanguy d'Everlangetdeverlange@kalliope-law.com
Litigation Nicolas Contisncontis@kalliope-law.com
Litigation Karen Leclerckleclerc@kalliope-law.com
Project finance Rodolphe Cavroyrcavroy@kalliope-law.com
Project finance Tanguy d'Everlangetderverlange@kalliope-law.com
Investment funds Rodolphe Cavroyrcavroy@kalliope-law.com
Mergers & Acquisitions Tanguy d'Everlangetderverlange@kalliope-law.com
GDPR compliance Karen Leclerckleclerc@kalliope-law.com
Food law, distribution and competition law Julie Gayrardjgayrard@kalliope-law.com
Labor and employment law Florence Coussaufcoussau@kalliope-law.com
Litigation Julie Gayrardjgayrard@kalliope-law.com
Commercial contracts Julie Gayrardjgayrard@kalliope-law.com
Corporate law Gregory Russogrusso@kalliope-law.com
Lorenzo Balzano photoMaitre Lorenzo BalzanoLorenzo Balzano is one of the founding partner of Kalliopé. He assists…
Rodolphe Cavroy photoMaitre Rodolphe CavroyRodolphe Cavroy is a partner at Kalliopé. He has developed in-depth and…
Nicolas Contis photo Nicolas ContisNicolas Contis assists big groups, small and mid-sized companies in all their…
Maitre Florence Coussau photo Maitre Florence CoussauFlorence joined Kalliopé as a partner in January 2021. Florence Coussau advises…
Jocelyn Duval photo Jocelyn DuvalJocelyn Duval, one of the founding partner, assists corporations and public entities…
Julie Gayrard photoMaitre Julie GayrardJulie Gayrard became a partner at Kalliopé in 2019. She assists and…
Karen Leclerc photoMaitre Karen LeclercKaren Leclerc is a partner Kalliopé. She assists a variety of clients such…
Gregory Russo photoMe Gregory RussoGregory Joined kalliopé as a partner in March 2022. He has developed…
Tanguy d'Everlange photoMaitre Tanguy d'EverlangeTanguy d’Everlange has developed a renowned expertise in the fields of corporate…
Partners : 9
Associates : 12
English (fluent)