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The team

We are a team of multidisciplinary experts recognized worldwide. Our experience and our flexibility allow us to best meet the challenges of our customers, companies, territories and governments, in France and internationally  Contact us

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Jean-Guy BARTAIRE, Board members president

Jean-Guy Bartaire first worked as an engineer in the manganese mines in Morocco from 1974 to 1978, then at the French Ministry of the Environment on the establishment of air pollution measurement and warning networks, until 1985. He then joined the European Commission (Directorate General Environment, Industrial Emissions Unit) to work on the implementation of the IPPC directives, IED, the definition of BAT (Best Available Techniques) … He joined in 1996 EDF to monitor environmental regulations and their impact on the electricity industry, in particular by chairing working groups within Eurelectric and Business Europe. With this experience, when he retired, he became the volunteer chairman of Citepa in 2016.

Jérôme BOUTANG, Executive director

Jérôme Boutang, an agronomic engineer with a master’s degree in economics, worked until 2011 in the agri-food industry in France, the United Kingdom, and the United States in applied research and technology transfers between R&D and industry, and then as an international consultant on sustainability strategies. In 2011, Jérôme joined the association of independent experts, Citepa, as the General Director. He assists the French government, companies, and emerging developing countries in their fight against climate change under the Paris Agreement (notably articles 6 and 13). In France, he contributed to the development of decision-support tools based on big data, carbon accounting methods, and footprint assessment, as well as mitigation and adaptation metrics. He was a member of the Consultative Group of Experts (CGE) of the UNFCCC between 2014 and 2020. Additionally, over the past fifteen years, he has developed expertise in cognitive biases at play in the perception of ecological threats and incentive strategies. He is the author of several works about evolutionary psychology.

Nadine ALLEMAND, Deputy director

Nadine Allemand has been Deputy Director of Citepa since 2011. After a degree in atmospheric sciences and a PhD in Analytical Chemistry, she joined Citepa in 1986. Nadine Allemand divides her time between technical and more administrative activities as well as foreign cooperation developments. She has a wide experience in pollution and policies and measures issues to reduce emissions, including air quality improvement and climate change mitigation. Among other tasks, she heads the techno-scientific secretariat of the “Task Force on Techno-Economic Issues (TFTEI)” of the Air Convention (CLRTAP) of the United Nations Economic Commission for Europe (UNECE) and participates in many works within the framework of this Air Convention. Most recently, she has been responsible for technical assistance for the French Environment Ministry (MTES) on decision support for the development of the national strategy for the reduction of air pollutant emissions (PREPA) in France and for similar technical support in the Paris region for the Environment regional directorate (DRIEE) for the development of its atmosphere protection plan (“PPA Ile de France”). She was project manager of a France / Serbia twinning project for the implementation of the European regulation on a mechanism for the monitoring and reporting of greenhouse gas emissions (MMR). She is currently on projects related to the fight against air pollution in Serbia and Turkey.

Jean-Pierre CHANG, Deputy director – Inventory Coordination Pole (PCI)

With a degree in Physics Chemistry from PARIS VI, Jean-Pierre CHANG has been in charge of Citepa’s emission inventories since 2005. He became Deputy Director after having been heading, from 2011 to 2020, the “Transport and Mobility; Agriculture, Livestock and Forestry; Support and IT Developments Department”. Since the early 1990s, he has developed an internationally recognized expertise in the field of quantification of air emissions. He is a member of various working groups on quantification and validation of emissions and a UN-recognized expert for monitoring, reporting and verifying emissions.


Department of Mitigation and Adaptation in France and International

Julien VINCENT, Head of Mitigation & Adaptation Department – PCI

Master of Air pollution management, Julien Vincent joined Citepa in 2002 after working in an analytical chemistry laboratory at CSULA, California (1999/2000). Due to the study of activities related to solvent emissions, non-road mobile machinery (NRMM) emissions and the costs of abatement techniques, Julien VINCENT became Deputy Inventory Manager in 2008 and then, head of the team in charge of energy balance, the manufacturing industry and the realization of carbon footprint (Bilan Carbone®), at the beginning of 2009. Since 2011, he is the head of the Energy and Industry Department.



Ghislaine TANDONNET-GUIRAN, Head of Climate solutions

Ghislaine Tandonnet Guiran has been working on environmental and sustainable development issues for more than 15 years, with a specialization in climate change since 2006. She is more particularly involved in the management of to climate change adaptation projects in France and internationally: in France, through the support of the Ministry of Ecology for the definition of the national adaptation plan and the evaluation of the associated costs, studies on the potential impacts of climate change for 6 regions (Medcie Grand Sud Est), climate plans energy for local communities, and internationally, on technical assistance missions to international organizations for the definition of adaptation strategies and programs as well as for the analysis and selection of projects (World Bank, UNEP, UNCDF, AFDB). She is also involved in putting together proposals with major donors for adaptation programs, in particular with the GCF. Its thematic areas of specialization are: urban adaptation, solutions based on nature, climate finance.

Ludivine COZETTE, Project engineer

Graduated from Sciences Po Strasbourg in international relations and from the Master “Adaptation to climate change” of the University of Paris Saclay, Ludivine joined Citepa in March 2022 as a research engineer in the Climate Solutions team. She is involved in the implementation of projects with international donors and participates in capacity building missions in foreign countries. She works more specifically on the issue of international reporting and monitoring and evaluation (M&E) of adaptation and related policies.


Waste, Low carbon transition

Romain BORT, Head of Waste, Energy, Low carbon transition team

A graduate of Toulouse’s Paul Sabatier University with a Master’s degree in Environmental Engineering, specializing in Air Treatment, Romain joined Citepa in 2011. His work at Citepa focuses on carbon accounting, for which he is responsible for projects and studies. Romain has been trained in the Bilan Carbone® method and the ACT® methodologies developed by ADEME to support organizations in developing and defining their low-carbon strategy. He is also Secretary General of the Association pour la Transition Bas Carbone and a member of the governance committee of ADEME’s Base Empreinte and of the Pôle de Coordination National des BEGES réglementaire piloted by the French Ministry of Ecology.

Eponine BRIER, Low-carbon transition engineer

An engineering graduate of Mines de Nancy, specializing in “Energy, Processes and Environment”, and of Polytechnique Montréal, Eponine joined Citepa at the beginning of 2023, in the Waste and Low-Carbon Transition team. Trained in the Bilan Carbone methodology, and the ACT Step by Step method, she carries out studies linked to greenhouse gas emission balances and low-carbon transition strategies for organizations. She also runs the Fresque du Climat workshop.

Benjamin CUNIASSE, Energy project engineer

A graduate in Maritime Engineering from ENSTA ParisTech, Benjamin joined Citepa in 2018 in the Energy and Combustion team. He works on the PCAET air components of the French territories and is specialized in wood combustion, he also carries out the NAMEA (National Accounting Matrix with Environmental Accounts) report allowing him to have a transversal view on sectors emitting GHGs and atmospheric pollutants.

Vincent MAZIN, Project engineer

A graduate of the Paul Sabatier University of Toulouse with a Master’s degree in Ocean, Atmosphere and Climate Sciences, Vincent Mazin joined Citepa in 2020 in the Waste, Energy and Low Carbon Transition unit. He works in particular on the estimation of air pollutant and greenhouse gas emissions related to waste and energy, as well as on the air components of the PCAETs for French territories.

Niels MONTANARI, Project engineer

Holder of master’s degrees in computer science, applied mathematics, and environmental physics, Niels Montanari joined Citepa in April 2021. He has previously worked internationally on research and development projects related to fluid simulation and flood and fire risk modelling. At Citepa, he is carrying out studies relating to corporate-level greenhouse gas emissions inventories and low-carbon transition strategies, taking part in producing national air emissions inventories for the energy sector, and developing a tool for building and optimising action plans and transition trajectories.


Impacte (Instruments & Carbon Markets, Climate Mitigation Policies and Energy Transition)

Houssem BELHOUANE, Head of Impacte team

Mohamed Houssem Belhouane holds an engineering degree in energy engineering. He joined CITEPA in 2021 as an energy and GHG mitigation expert, in charge of the assessment of energy supply and demand, energy policies related to decarbonation objectives, analyses, models and tools for the energy transition in France and in third countries. Working for more than 14 years on the accompaniment of countries, and public and private actors on Climate-Energy aspects, he has a sound experience in energy and emissions forecasting as well as in elaboration, techno-economic analysis, MRV, and impact assessment (GHG, SD and macroeconomic) of mitigation policies and instruments: NAMA, NDC, LT-LEDS, mitigation measures, carbon pricing instruments, projects related to Article 6 market mechanisms … He also intervenes in assisting countries on inventory, projection, and reporting of GHG emissions in the energy sector, tracking of NDC progress, monitoring of policies and measures, … within the framework of Article 13 of the Paris Agreement.

Bernardo MARTINS, Energy project engineer

Graduated of the Paris Saclay university and the IFP school in the “Environment, Energy and Transports Economics” Master, Bernardo Martins joined Citepa in 2021 after developing a project on low-carbon modelling for his hometown, Niteroi (Brazil), as part of his master thesis. Previously, he worked in two multinationals in Brazil and France, and then in a consultancy specialized in GHG emissions reductions, as well as in the french Environment Ministry. At Citepa, he’s a member of the Energy team and works on private and public actors’ air-climate-energy transition in France and internationally.

Grégoire BONGRAND, Energy project engineer

Graduated from Nancy School of Mines and the University of Alberta (Canada), specialized in masters in “Energy and Environment”, Grégoire joined Citepa in early 2019 to participate to air emission inventory development in energy production and consumption. In addition, he now contributes actively to emission projection evaluations and emission reduction strategies, in France as well as abroad, on Energy and Industrial process sectors. Grégoire focused on atmospheric pollutant emission reductions through diverse projects and the Task force on techno-economic issues (TFTEI), with who he developed a guidance document on maritime shipping for the Air convention (CLRTAP). He is also responsible for the National inventory report (NIR) of greenhouse gases, submitted to UNFCCC.


Air pollution, mobility, territories

Jean-Marc André

Jean-Marc ANDRE, Head of the Air pollution, mobility, territories Department

PhD in climate and physical chemistry of the atmosphere, with a specialization in instrumentation and aerosols, Jean-Marc André joined the Citepa in 2007. He participated in the European project ARTEMIS within the IFSTTAR. He is the head of the Transport and Mobility team and participates in various bodies (CCTN, CTUPP, OEET, …).



NDC, Adaptation, Cluster, ETS

Coralie JEANNOT, Head of the NACE team

Graduated from Paris Diderot University in Master’s degree “Atmospheres and Air Quality”, Coralie Jeannot joined Citepa at the end of 2010 and is the head of the Industrial Processes, ETS, Capacity Building and Economics team since May 2018. Her activity at Citepa is concerned in particular with the EU-ETS (EU-ETS training provided by Citepa ) and the estimation of industry emissions.


Mitigation strategies for air pollution reduction

Natalia SIRINA-LEBOINE, Head of Mitigation strategies for air pollution reduction team

Natalia SIRINA-LEBOINE has a PhD in Geography (Irkutsk State University, Russia, 2009) and is an expert in air pollution. She joined Citepa in 2020 after working for higher education and research organizations in France, Russia and Germany. She has participated in the implementation and coordination of major projects in vegetal-based chemistry (MIT#1 and Evalbioraf, PIA PIVERT; Sorago, FUI) and electrical energy storage technologies (ABattReLife, ERA-NET) involving academic and industrial research organizations. Within Citepa, she heads the Air Pollution Mitigation Strategies (SAPA) team and develops cooperation in France and abroad, particularly in Eastern Europe, the Caucasus and Central Asia.

Tamara BRAISH, Project engineer

Tamara Braish holds a Ph.D. in analytical and environmental chemistry from the University of Pau and the Adour Region (UPPA) in 2019. After six years of experience as a researcher in the field of indoor air pollution, Tamara has joined Citepa in June 2023 as a project engineer within the SAPA unit (Mitigation strategies for air pollution reduction). She contributes to various projects that focus on the emission of atmospheric pollutants and greenhouse gases associated with industrial solvent usage, as well as projects aimed at reducing Volatile Organic Compound (VOC) emissions. Her responsibilities include providing technical support for estimating VOC emissions and developing Solvent Management Plans and Emission Control Schemes. Additionally, she actively participates in updating the inventory of industrial atmospheric emissions, conducting techno-economic studies for VOC emission reduction, and verifying GEREP declarations.

Rania KAMAR, Project engineer

Rania KAMAR is an agronomy engineer specialized in ecology and management of natural ecosystems. She has a master’s degree in engineering and management of environmental projects from the University Paul Valéry 3 of Montpellier. She joined Citepa in March 2022 as a study engineer in the unit Strategies for Atmospheric Pollution Mitigation. Within Citepa, she participates in the update of the inventory of GHG emissions and pollutants in the air from industries. In addition, Rania is involved in studies related to strategies to reduce emissions of air pollutants. Within the framework of the air convention (CLRTAP) of the United Nations Economic Commission for Europe (UNECE), she participates in the work carried out by the TFTEI team (Task Force on Techno-Economic Issues).

Jean-Marc André

Corentin VANCAYSEELE, Project engineer

Corentin Vancayseele holds a Master’s degree in Chemistry, Analysis, Instrumentation and Industries. He joined Citepa in 2022 as a research engineer in the GEREP – Regulation – Industries – Training – ETS – Solvents unit, under the responsibility of Coralie Jeannot. Corentin has previously worked at TOTAL and INERIS in the field of measurement of pollutants released into the atmosphere. Corentin participates in the development of atmospheric emission inventory methods for the chemical and petrochemical industry, in the realization of solvent management plans and technical-economic studies for the reduction of VOC emissions, as well as in the verification of GEREP declarations.


Transport and Mobility team

Sophie MOUKHTAR, Head of the Transport and Mobility team

Sophie Moukhtar completed her PhD in atmospheric chemistry at the Ecole INP-ENSIACET, in collaboration with INERIS. She joined Citepa in 2021 as head of the Transport and Mobility Unit. Sophie Moukhtar has over 15 years’ experience in air pollution, acquired at the Centre for Atmospheric Chemistry in Toronto, Canada, and at Airparif, the air quality observatory for the Île-de-France region. At Citepa, Sophie Moukhtar follows the work of the CLRTAP Convention (Convention on Transboundary Air Pollution), the Air Pollution Forum and the United Nations Environment Assembly (UNEA). Sophie Moukhtar is co-leader of the “Air Quality and Emissions” group of EIONET (European Environment Information and Observation Network) of EEA (European Environment Agency) and participates in numerous projects and capacity building in France and abroad.

Thamara VIEIRA DA ROCHA , Transport project engineer

Thamara VIEIRA DA ROCHA holds a PhD in civil engineering from the National School of Public Works and an engineer from the Federal University of Santa Catarina (Brazil), specialized in sanitary and environmental engineering. She joined Citepa in 2015 and is currently in charge of atmospheric emissions from shipping studies and inventories, as well as calculations of uncertainties for the entire inventory. In addition, Thamara is responsible for a collaborative R & D project in the field of urban transport and emission reduction. Finally, she participates in various studies related to other types of transport.

Felipe TRONCOSO-LAMAISON, Transport project engineer

Graduated in Mechanical engineering from Université de Technologie de Compiègne and holding a master in transport & sustainable development from the Ecole des Ponts et Chaussées, Felipe has joined the CITEPA as a project engineer in the transport & mobility team in may 2021. His activity within CITEPA includes the atmospheric pollutants & GES inventories of the sector as ell as the development of emergent and developing countries capcities in terms of climate, energy and air quality. He also work on models and tools estimating transport emissions.

Adrien MERCIER, Project engineer

A graduate of Polytech Orléans and IFP School in the field of energy and motorization, Adrien Mercier joined Citepa in May 2022 as a project engineer. His main activities are focused on transport emissions and regulations and the development of emission modelling tools. With a technical background, he is also developing an expertise in non-exhaust emissions in addition to the one he has obtained in the field of motorization through his previous experiences.


Agriculture, Forest, Land-Use (AFOLU)

Etienne MATHIAS, Head of Agriculture, Forestry and Land use Department – PCI

Engineer in agronomy specialized in environment (Ecole Nationale Supérieure Agronomique de Toulouse – National High School for Agronomy of Toulouse), Etienne MATHIAS joined Citepa in 2006 to participate in the development of air emissions inventories (monitoring of agricultural and forestry sectors). Now as inventory assistant manager, head of the Agriculture, Forestry and Land Use team and UNFCCC expert, he participates in various work groups related to Ministries, technical institutes and research, carries out various works, training missions abroad and studies (regional inventories, projections, reviews, methodological improvements, sectoral analyzes …). Finally, he is responsible for the internal IT development.

Anaïs DURAND, Agriculture & ETS project engineer

Anaïs is an engineer in agronomy, specialized in sustainable development, environment and energy economics (Agroparistech ex INA – PG). She joined Citepa in 2014 as part of the Agriculture team, to participate in the development of air emissions inventories for the agricultural sector. She is also a specialist in the EU Emissions Trading Scheme (EU-ETS) and trainer in the framework of the 3rd and 4th period of greenhouse gas emissions trading (allocation of free allowances, emissions monitoring and reporting)

Jonathan HERCULE, Agriculture project engineer

Jonathan HERCULE is an agricultural engineer specialised in environmental economics and sustainable development (AgroParisTech). He joined the CITEPA in 2021 as a project engineer within the Agriculture unit, to participate in updating the French national inventories on greenhouse gases and atmospheric pollutants as well as to conduct studies. Jonathan began his professional career at INRAE in 2014 in economic modeling (CLAC-LUC) and then in project management for a national expertise on livestock impacts and services. He then joined ITAVI in 2017 as an economic analyst where he conducted sectoral studies and participated in European research projects (PPILOW, ROADMAP 2050) on behalf of several clients.


Land-Use, Land-Use Change and Forestry (LULUCF) team

Colas ROBERT, Head of LULUCF team

Colas has a PhD in geography, graduated from Paris-Diderot University since 2016. A specialist in methods for monitoring land-use changes, the spatialization of emissions and the LULUCF sector in France and abroad, he is also responsible for the national inventory report of GHG emissions and atmospheric pollutants in the SECTEN format (SECTeurs Economiques et ENergie – Economic and energy sectors) and participates in information dissemination and communication work.

Mélanie JUILLARD, LULUCF project engineer

Agronomy engineer (AgroParisTech), Mélanie JUILLARD joined Citepa as part of the LULUCF team in 2021 after professional experiences, especially in National Parc, in South America and in the Ecology Ministry (sustainable development team). With her double specialitiy in forest management and environmental economics, Mélanie participates in updating the LULUCF sector for the national inventory, in methodological improvement with strong scientific stakes, and in studies in this field.

Quentin BEDRUNE, LULUCF project engineer

Quentin Bédrune, a graduate agronomist from the Purpan School of Engineers in Toulouse (France), joined Citepa in 2023 as a study engineer within the Agriculture, Forest, and Land Use team (AFOLU). He initially worked on the design of organix technosoils for urban agriculture and then on the development of services for the reduction and valorisation of organic waste in the food and plant sector. At Citepa, he is involved in methodological improvement and the spatially explicit update of the national inventory of emissions for the LULUCF sector, and he participates in the implementation of studies and missions in France and internationally.

Communication, IT and Sustainable Development

Stéphanie BARRAULT, Head of Communication, IT and Sustainable Development Department

PhD in energy, Stephanie Barrault is in charge at Citepa since 2017 of fluorinated gases studies, mainly for the refrigeration and air conditioning sectors. In parallel of the fluorinated gases emissions inventory studies and projections, she participates in the development of tools of calculation of emissions, ensures the follow-up of the regulations and the developments of new refrigerants and animates the Research and Partnerships Pole of Citepa.

Fatima AKEAN, Communication Officer





Information Management & Data Visualization

Mark TUDDENHAM, Information officer

Mark Tuddenham has been responsible for information at Citepa since 2002. His fields of expertise are political, legislative / regulatory and scientific developments in the fight against air pollution and climate change at the national, european and international levels. . As such, in the framework of its watch, he closely monitors the negotiations and other work within the various organizations and international arena, and in particular the UNFCCC, IPCC, UN Environment, IEA, ICAO, IMO, OECD, UNECE, as well as those of the EU institutions (Council, Parliament, Commission and Court of Justice). From this work of watch, he analyzes the relevant information on the air-climate subject, synthesizes them for dissemination in the form of articles in the Citepa’s monthly newsletter (“C’est dans l’air”) or brief news on the Citepa website (almost daily updated). On key topics, he writes punctually detailed Summary Sheets (“Fiches de Synthèse”).


Support and IT Developments

Lisa GRELLIER, Head of Support and IT Developments team

PhD in environmental modeling, Lisa joined Citepa in 2017 in the Support and IT Developments team. Her activity within Citepa concerns the IT tools developments. She participates in the compilation of the French emission inventory reporting and leads the development of the RISQ tool, marketed abroad to accompany emissions reporting.

Ariane DRUART, Web/Inventory senior technician

Senior technician (IUT de Paris – Paris V). Ariane joined the Citepa Support and IT Development team (SDI) in 2001. She is specialized in database management and participates in the realisation of air emissions inventories, including SECTEN, Overseas by territory, UNFCCC and UNECE, and assists the engineers in the framework of studies and the entire management team. Within Citepa, she is also in charge of updating the content of the website.

Antoine GAVEL, IT support senior technician

Antoine joined the Citepa Support and IT Development team (SDI) in September 2007. Specialized in database management, he participates in the realization of air emission inventories, particularly that of the Large Combustion Plants, and assists engineers in the framework of studies. Within Citepa, he is also in charge of the computer system as well as the website.



Administrative and financial department

Hélène SCHATZ, Head of administrative and financial team

She joined Citepa at the beginning of 2012 to take the lead of the AFFAIR team. With a degree from the ESG (Ecole Supérieure de Gestion – management graduate school) and a master’s degree in Economics (Markets and Business Strategies), she acquired more than 20 years of experience in accounting and finance in various fields (construction, interim, SSII, publishing, international trading, consulting and design). She is currently in charge of Citepa’s general and analytical accounting, budgets, HR, taxation and associative legal and administrative and financial issues as a whole; in addition to the other two members.

Laurence BRAILLON, Accountant-manager & financial controller

Laurence Braillon joined the AFFAIR team in January 2020 as an accountant-manager. After a dozen years in companies as a management controller, in groups and start-ups, Laurence trained to become an independent orthopedagogue. Today, she is back in her first job to work at Citepa.

Khadija TIMMOU, Administrative and accounting Assistant

Khadija TIMMOU joined the AFFAIR team in November 2023. With a degree in information and communication, Khadija worked for some fifteen years as a post-production manager for various advertising film production companies. She then became self-employed and opened a table and chambre d’hôte in La Rochelle. In 2023, back in Paris, she took up a salaried position with Citepa as Administrative Assistant.

Valentine DALODIERE, Sales administration and customer relationship officer

She joined the AFFAIR team at the beginning of 2019. After a bachelor’s degree in science and a master’s degree in foreign languages and international exchanges, specialized in international trade, she worked in various companies: construction, military, industry, cosmetics, technologies, … She is responsible for the administration of ongoing projects at Citepa, trainings and customer relations: tenders, registration management, agreements and training convocations, invoicing, financial deadlines, customers provisional and confirmed budget management.