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Longevity Partners

Étienne Cadestin

Founder & Global CEO (UK)

Etienne founded Longevity Partners in 2015.  Prior to that, Etienne worked at Knight Frank, JLL and the United Nations Environment Programme (the leading global environmental authority that sets the global environmental agendas).

Etienne has more than a decade of experience in sustainable property investment and strategy. He currently advises the largest property investment companies in Europe and is on the board of Orée, the leading French think tank on Biodiversity, circular economy and ESG reporting. 

Last year, Etienne won the EG Awards in the category ‘Future of Real Estate’. Before that, Etienne was picked to be an Estate Gazette’s 'Property Rising Star' and nominated for numerous awards as one of the most active young leaders in the sustainability and real estate industries. He regularly speaks at high-level events, giving his vision for smart cities, carbon neutral buildings, wellbeing in the work place and the future of the real estate industry.

Etienne graduated from the London School of Economics. A keen sportsman, Etienne has run nine marathons and enjoys playing tennis, sailing, skiing, cycling and golf. He is married with a daughter and a son.

Roger Baumann

Non-Executive Director and Chair of the Remuneration Committee (UK)

Roger Baumann joined Longevity in 2019 as a non-executive Director and Chair of the Remuneration Committee. Roger Baumann brings 20 years of business experience in Real Estate, Consulting, Product Development, IT, Finance, Sustainability and Operations. His most recent position was as COO & Head Sustainability Global Real Estate for Credit Suisse Asset Management in Zürich, Switzerland and as Managing Director for the Credit Suisse German entity, Credit Suisse Asset Management KAG, based in Frankfurt. He has just joined Zurich Insurance Group Ltd. as COO & Head Product Development Global Real Estate based in Zürich effective September 30, 2019. Roger has a Civil Engineering Degree from ETH Zurich and holds an international MBA from the State University of New York. In addition, he is a Member of the Royal Institution of Chartered Surveyors (MRICS) and a member of the European Investment Committee of the EU-funded research project CRREM (Carbon Risk Real Estate monitor).

Louise Ellison

Senior Advisor to the board (UK)

Louise Ellison joined Longevity Partners’ board as a senior advisor in 2019. She advises the Board on strategy and governance. Louise is the Group Head of Sustainability at Hammerson PLC, one of the UK’s leading property development and investment companies. She has had previous Sustainability roles at M&G Real Estate and Quintain Estates and Development and was the Research Director at Investment Property Forum. Louise also holds several external roles such as the Chairmanship of the Better Buildings Partnerships (BBP) and of the European Public Real Estate Association (EPRA) Sustainability Committee and is a member of the Green Construction Board.

Roger Toussaint

Managing Director Dutch Office (NL)

Having been active in the field of sustainable urban development since 2012, Roger joined Longevity Partners as Managing Director for the Netherlands. He has a bachelor’s degree in Regional Development and Innovation and a master’s degree in Sustainable Development - Environmental Governance.
Roger joined Longevity Partners from OPPS, where he worked as a public procurement consultant on integrated contracts (DBFMO) for sustainable & healthy buildings, and previously worked at TNO (The Netherlands Organisation for Applied Scientific Research) on low-carbon climate resilient cities. Roger has as a strong motivation to accelerate the transition towards sustainable cities through strategic advice, benchmarking and by connecting people, initiatives and innovations.
In addition to his work in sustainability, Roger is a board member of Stichting Flor Ayuda, a Dutch charitable foundation for deprived children in Guatemala. Roger is a tennis player, coffee drinker, a movie enthusiast and has a passion for photography.

Douglas McKenzie

Group Finance Director (UK)

Douglas is the Group Finance Director and a member of the Risk and Compliance Committee. He brings wide ranging expertise to the day to day asset management of the underlying funds, and completion of corporate and asset transactions. His oversight responsibilities cover the finance, accounting, tax, treasury, risk management and regulatory compliance of the firm as an AIFM (Alternative Investment Fund Manager).

Douglas worked at Moore Stephens LLP from 2000 to 2012. Having qualified as a chartered accountant in 2001, Douglas provided audit and assurance services to a client base comprising high-net worth family office investment and hedge funds, shipping and real estate clients (both private and public).

Dr Lois Salem

Chief Operating Officer (UK)
As Chief Operating Officer, Lois is responsible for overseeing the day-to-day administrative and operational functions of Longevity.
Lois has a PhD in Volcanology and Geochemistry, an MSci in Earth Sciences and an MA in Natural Sciences from the University of Cambridge. She has previously worked in strategy, business development and investor relations for a private resource exploration company.
Lois loves exploring the great outdoors and in her spare time can be found hiking, skiing, climbing, kayaking and anything else surrounded by nature.

Anthony Maguire

Associate Director (UK)

With over four years’ experience in the real estate sector, Anthony joined Longevity Partners in 2017 from JLL. He specialises in renewable energy solutions for our turnkey clients and is particularly well versed within the retail and industrial sectors.

Anthony has a BA in Geography from UCL and an MSc from Imperial in Environmental Technology.

Outside of work, Anthony is a keen cyclist and a (very) amateur brewer.  

Ding Li

Senior Strategy Consultant (UK)

Ding joined Longevity Partners as Senior Strategy Consultant. She advises clients on the development of corporate strategies, policies, and action plans on sustainability issues. 

She is a Certified Associate in Project Management through the Project Management Institute. With experience working in Hong Kong, Singapore, Sydney, and Paris, Ding supports companies in embedding sustainability principles into their business operations and organisational culture.

Ding is a gymnast and a science communicator in her free time. She was an honoree of 2018 “30 Under 30” organised by GreenBiz Group and the World Business Council for Sustainable Development (‘WBCSD’), World Top 10 Finalists of the Famelab International in the UK Cheltenham Science Festival, and a secondary school teacher at Presbyterian International Junior High School in Wa, Ghana.

Laure Ferrand

Senior Energy and Sustainability Consultant (UK)

Laure joined Longevity Partners as Senior Energy and Sustainability Consultant, strong of several years’ experience in Energy Performance Contracting for a large CAC40 company. Having a Master’s Degree of Engineering and a MBA, she acquired skills to successfully deliver large scale energy projects. She has also pursued  3-year entrepreneurial journey before joining Longevity, adding to her business and strategic thinking skills.

Laure is an advocate of business doing good and an innovation supporter.

Margaux Gatty

Marketing and Communications Manager (UK)

Margaux joined Longevity Partners as Marketing and Communication Manager. Margaux joined Longevity Partners from her role in Public Relation at Lansons Communications. She graduated with an Msc and an MA from the LSE and the University of Southern California where she focused on media, marketing and global communication. She previously worked as a journalist at Responsible Investor and participated in a collaborative journalism project with BBC News, FirstDraft News and Google called 'CrossCheck' where she tracked disinformation surrounding the French Presidential Election.

Margaux's areas of interest are social impact, storytelling and media transparency. In her spare time Margaux enjoys hiking and is a strong supporter of 'green tourism'.

Amedeo Musini

Southern Europe Business Growth Lead (UK)

Amedeo is the Business Growth Lead at Longevity Partners. He graduated from King’s College London with an MA in Environment and Development. He previously worked with the United Nations Global Compact, pursuing Sustainable Development Goals with businesses in the U.S. and in Chile.

Amedeo is a keen traveller and in his spare time he trains in Brazilian Jiu-Jitsu and enjoys kitesurfing, playing football and hiking.

Bernard d'Arche

Business Growth Associate (FR)

Bernard joined Longevity in 2020 as Business Growth Associate, after completing an MBA in Real Estate Development at the IE Business School in Madrid. He also obtained a double Bachelor degree in Economics and Philosophy from McGill University in Montreal (Quebec). Between 2014 and 2018, Bernard founded and managed his own firm, awarded numerous times, aiming to contribute to the rebuilding of the Megantic Lake (Quebec), a city destroyed by a train accident carrying 7 million litters of oil. This reconstruction was based on a sustainable development approach.

Bernard has the French and Italian nationalities and possesses an extensive international experience. He is passionate about the great outdoors, whether in the air where he practices parachuting and on land where he loves to hike.


Anneli Tostar

Business Growth Associate (US)

As the Business Growth Associate for the West Coast of the U.S., Anneli is part responsible for building out business operations for Longevity Partners in North America.

Anneli has an MSc in Sustainable Urban Planning & Design from KTH in Stockholm, and a B.A. in Anthropology and Environmental Science & Public Policy from Harvard University. She has previously worked at The Better Buildings Partnership, where she oversaw stakeholder engagement for a collaboration of UK real estate firms, focused on sustainability. She has also worked at an ESG consultancy and a social impact consultancy. 

In her "spare" time Anneli is a professional artist but can also be found taking unnecessarily long walks around the city.

Divya Hariramani Herrero

Innovation and Energy Consultant (UK)

Divya joined Longevity Partners in 2017 after graduating with as a Mechanical Engineer and completing a fully funded double Master’s in Renewable Energy Engineering in Lisbon, Barcelona and Stockholm, which focused on energy in the Built Environment and Energy policies.

With previous experience in the energy sector working with the likes of EOn, she is now leading all Spanish projects across the business, focusing on Energy optimisation and is developing the Health & Wellbeing service line.

Olivia O'Brien

Sustainability & ESG Strategy Consultant (UK)

Olivia joined Longevity Partners as a Sustainability Analyst in 2018 and is now a Sustainability and Energy Consultant. She graduated with an MA (Hons) in French and Geography from the University of St Andrews, specialising in climate change science and policy. Prior to her role at Longevity Partners, she worked towards developing sustainable livelihoods in rural Nicaragua, and with the United Nations Environment Program (Geneva) in evaluating their international projects, focusing on stakeholder engagement.

Olivia is a keen traveler and sportswoman, playing hockey since a young age whilst also enjoying long-distance running, skiing and trekking.

Lena Schneidewind

Sustainability and Energy Consultant (UK)

Lena joined Longevity in 2019, having graduated from the University of Oxford with a Master in Chemistry specialising in environmental issues. For her master thesis, she worked in the Environmental Engineering Department on circular systems converting carbon dioxide back into transport fuels.

Lena loves being outside, engaging in activities from climbing and skiing, to acroyoga on mountain tops. She has a passion for acting and DIY projects.

Thomas Lariviere

Innovation & Biodiversity Consultant (FR)

Thomas joined Longevity Partners in 2018 as a Sustainability Analyst and is today an Innovation & Biodiversity Consultant. He has graduated from the Rennes School of Business with an MSc in Sustainable Management and Eco-innovation in partnership with l’Ecole des Métiers de l’Environnement, engineering school, and a Bachelor degree in Biology.

He has previously worked on CSR topics, including 1 year as an auto-entrepreneur working on different sectors for 6 Dalkia production facilities (Risk Assessment), SAUR (Economic Footprint), GPSO (CSR assessment), and assessed the CSR practices of CEMEX France Parisian production sites. Based in Paris, he now advises Longevity Partners' clients on their sustainability strategies.

Thomas is a triathlete and hiking lover.

Myriam Busch

Innovation & Energy Consultant (FR)
Myriam joined Longevity Partners in 2019 as a Sustainability Analyst and is today an Innovation & Energy Consultant. She graduated from Ecole des Métiers de l’Environnement - Unilasalle Environmental Engineering School in Rennes and from a 2 years degree in biological and environmental sciences in Strasbourg University.
She previously worked on energy efficiency at Schneider Electric and on the digitizing of energy management. She also did her master thesis about the energy transition of an international distribution center.
She loves to travel to meet incredible people, eat pasta and do artistic gymnastics.

Hannah Brown

Innovation & Energy Consultant (UK)

Hannah joined Longevity in 2019 as a Sustainability & Energy Analyst and is today an Innovation & Energy Consultant. She has graduated from the University College London with a masters in Sustainable Resources: Economics, Policy and Transitions, after completing her undergraduate degree in Economics and Geography. For her master’s thesis, she researched the impact of mining in the vicinity of World Heritage Sites, working alongside UNESCO, the WHO and several gold mining companies. 

Hannah loves travelling, painting and is a huge fan of nature documentaries.

Daniel Lechner

Energy and e-mobility consultant (UK)

Daniel joined Longevity Partners in 2019 after completing a master’s in Sustainability Management at ESCP Europe. Prior to his graduate studies, he studied Sustainable Development at the University of St Andrews before working as a Clean Energy Programmes analyst for the Pacific Gas and Electric Company in San Francisco, where he was dedicated to electric vehicle infrastructure and time of use rate projects.

Outside of work Daniel enjoys hiking, cooking, and language classes and exchanges.


Benjamin Watkins

Innovation & Energy Consultant (UK)

Ben joined Longevity Partners in 2019 as a Sustainability & Energy Analyst and is today an Innovation & Energy Consultant. He graduated from the University of Manchester with an B.Sc. (Hons) in Geography with International Study. He focussed on climate change and environmental issues before moving on to the University of Edinburgh to study the interdisciplinary course M.Sc. Energy, Society and Sustainability, focusing more heavily on renewable energy.

Juliette Mabardi

ESG Strategy & Reporting Consultant (UK)

Juliette joined Longevity in 2019 as a Sustainability and Energy Analyst and is today an ESG Strategy & Reporting Consultant. She graduated from the Louvain School of Management (LSM) with a masters in Corporate Sustainable Management. For her master’s thesis, she studied the use of the Sulitest (Sustainability Literacy Test) in the master program of the LSM, and its impact on the students.

Juliette has experience in sustainability management and reporting in different sectors: energy, medical equipment and higher education.

Juliette is part of Generation T, a Belgian network of young people working towards a sustainable society. In her spare time, she enjoys reading, travelling and discovering new cultures.

Mélanie Martinasso

Sustainability and Energy Consultant (UK)

Mélanie joined Longevity in 2019 as a Sustainability and Energy Analyst and is now a Sustainability and Energy Consultant. She graduated from the Swiss Federal Institute of Technology in Lausanne in 2015 in Environmental Sciences and Engineering.

She began her career in the construction sector as an engineer in the field of green building design and energy saving. For 3 years, she performed building audit and concept for both, new construction and renovation. She worked closely with local authorities, certificate accreditors and contractors to identify best sustainable solutions in order to reduce carbon emissions for the built environment.

Out of the office, Mélanie enjoys discovering new cultures and spending time in the wild. She loves her native mountains, The Alps, and practices hiking, Nordic skiing, running and time to time playing golf.  

Eugénie Comty

Sustainability & Energy Analyst (UK)

Eugénie joined Longevity Partners in 2019 as a Sustanaibility & Energy Analyst. She graduated from Centrale Nantes with a Masters of engineering in ecological transition. Prior to her role at Longevity Partners she worked for a start-up company fighting planned obsolescence and for a management consulting company.

Outside of work she enjoys reading, dancing and learning new languages.

Faye Osgood

Sustainability & Energy Analyst (UK)

Faye joined Longevity Partners in 2019 after completing a MSc in Environmental Economics and Climate Change at the London School of Economics and an undergraduate Economics degree at the University of Southern California. Faye is passionate about improving the sustainability of the built environment, and previously worked for the U.S. Green Building Council.

In her spare time, Faye enjoys painting, cooking, yoga and exploring new places.

Alice Pellé

Marketing & Communication Assistant (UK)

Alice Pellé joined Longevity Partners in 2020 as Marketing and Communication Assistant. She has a BSc in Media, Communication and Sociology from City, University of London as well as an MSc in Media, Communication and Development from the London School of Economics and Political Science. She has previously worked within the urban agriculture and charity sectors and is interested by all things touching on sustainable development.

In her spare time, Alice enjoys traveling and cooking.


Ralf van Santen

Sustainability & Energy Analyst (NL)

Ralf joined Longevity Partners in 2020 as a Sustainability and Energy Analyst. He holds a BSc in Architecture & Engineering and a MSc in Sustainable Business & Innovation. His previous research and consultancy experiences span various sustainability topics, including circular economy. 

Ralf has been playing hockey from a young age. He has an eclectic taste in music, films and books. Additionally, he enjoys the outdoors.

Frédéric Bardy

Sustainability & Energy Analyst (UK)

Frédéric joined Longevity in 2020 as a Sustainability and Energy Analyst. He holds a BSc in International Agriculture and a postgraduate degree in Sustainability Management. He previously worked in the retailer sector and the food industry where he managed CSR projects.

Frédéric loves geopolitics as well as travelling to discover new cultures. In his free time, he also enjoys outdoor activities such as snowboarding, running and hiking.

Eric Coll Costa

Sustainability & Energy Analyst (UK)

Eric joined Longevity Partners in 2020 as a Sustainability & Energy Analyst. He first graduated from UPC Barcelona with a B.Sc. in Industrial Electronics and Automation Engineering. After working full time as an electronics technician for half a year, he then enrolled in the M.Sc. in Energy Engineering at UPC with a focus on renewable energies. During that time, he completed an internship at Endesa, where he was part of the distribution grid’s technical project management.

He is a triathlete and in his free time he enjoys reading and learning new languages.

Ika Jones

Account and Operations Assistant (UK)

Ika joined Longevity in 2020 as an Account and Operations Assistant. She is an ACCA qualified accountant and has a history of working in the financial services industry. She has extensive experience in working in high-pressure environements and excels in delivering financial analysis and presentations.

Kittithat Promthaveepong

Senior Energy Consultant (UK)

Kittithat joined Longevity Partners in 2020 as a Senior Energy Consultant. He is currently completing his MBA at the University of Oxford, and holds a bachelor’s degree in Chemical Engineering from the National University of Singapore. Prior to Longevity Partners, he worked as a commercial consultant in natural gas and is well versed in the energy business.

In his spare time Kittithat likes walking in the countryside and cooking.

Gabriela Palma

Sustainability & Energy Analyst (UK)

Gabriela joined Longevity Partners in 2020 as Sustainability Analyst. She graduated from the Kelley School of Business at Indiana University in May 2020 with majors in Public Policy Analysis and Sustainable Business. She has several years of experience in consulting and corporate strategy for non-profit organisations in the U.S. and Latin America. She recently spent six months studying Green Corporate Strategy at the Hong Kong University of Science and Technology.

She is a pianist and world traveller, and in her spare time Gabriela enjoys reading, the outdoors, and anything related to the arts.

Clémence Verdickt

Sustainability Analyst (FR)

Clémence joined Longevity as a sustainability analyst in 2020. She graduated with a masters in Management and Corporate Sustainable Development from EM Lyon Business School. For her masters thesis, she worked on assessing suppliers’ sustainable practices within the supply chain. Prior to her role at Longevity, she worked on sustainable and CSR issues for Klépierre.

Clémence is also a keen traveller as well as a great admirer of the mountains, practicing climbing and skiing whenever possible.

Fiona Halpin

Sustainability & Energy Analyst (UK)

Fiona joined Longevity as a Sustainability & Energy Analyst in 2020 after completing a MSc in International Strategy and Sustainability. She wrote her thesis on the changing landscape of non-financial reporting; diving into corporate ESG practices in a Nordic context. The objective was to expand the understanding of how listed companies are navigating the changing standards of ESG reporting. Before joining Longevity, Fiona completed an internship at Nasdaq working with their ESG Data Portal and developing the Nasdaq Sustainable Bond Network.

In her spare time Fiona enjoys the outdoors, yoga and meditation. In fact, she is a certified Mindfulness Mediation teacher.

Auriane Monti

Sustainability Analyst (FR)

Auriane joined Longevity Partners as a Sustainability analyst in 2020. She previously obtained an agricultural engineering degree from the National School of Agronomy in Toulouse with a specialization in environmental law and management thanks to a semester of exchange with the University of Sherbrooke in Canada. Auriane completed her end-of-studies internship at the real estate asset management company AEW Ciloger where she worked on various projects related to sustainable development in real estate, such as energy audits, building certifications, or even photovoltaic projects.

Auriane likes to spend her free time hiking or taking a stroll through Paris.

Olaf Amersfoort

Sustainability & Energy Analyst (NL)

Olaf joined Longevity Partners in 2020 as a Sustainability and Energy Analyst. After his BSc international land and water management, he obtained his MSc degree in Urban Environmental Management. He has experience with issues in the field of energy supply, wastewater treatment and sustainable mobility. Olaf has completed an internship at Witteveen + Bos in the field of circular economy. For his master thesis he studied nature-based wastewater treatment systems as part of the LOTUS project in New Delhi, India.

Olaf likes to spend his spare time outdoors. He loves hockey and football. He is also a big fan of mountain biking and enjoys travelling.

Christopher Wehbe

Energy Analyst (UK)

Christopher joined Longevity Partners in 2020 after completing a MSc in Energy Systems at the University of Oxford. As part of his master’s thesis he delved into the role of power and carbon markets in reducing emissions in the UK. He previously completed his undergraduate studies at University College London in Mechanical Engineering while focusing on entrepreneurship and renewable energies.

Before joining Longevity Partners, Christopher undertook an internship at Générale du Solaire where he took part in the engineering team to develop various solar projects across the world.

Christopher is a keen traveler and loves being outdoors. In his spare time, he likes skiing, cycling and running.

Lize Festers

Sustainability & Energy Analyst (UK)

Lize joined Longevity Partners after completing a master’s in climate change science and policy at King’s College London. She previously completed a master degree in ecology at KU Leuven. Before joining Longevity Partners, Lize undertook an internship at the Climate Policy Initiative where she tracked sub-national climate finance and analysed cities’ budgets.

During her free time, she loves travelling, hiking and learning new languages.

Carson Smith

Sustainability & Energy Analyst (US)

Carson joined Longevity Partners in 2020 as a Sustainability & Energy Analyst. She received a B.S. from UCLA with a major in Environmental Science and a minor in Civil and Environmental Engineering. Carson previously worked as an Environmental Legislative Aide in the Texas House of Representatives, producing statewide emission reports with the intention of drafting a master climate plan for the state of Texas. 

A proud Texan and prouder Austinite, Carson is an avid yogi, a true crime documentary fanatic, and an amateur collage artist. She enjoys exploring vintage stores, hiking, and most genres of music — ironically, everything except for country.

Talula Belle Thibault

Sustainability & Energy Analyst (US)

Talula joined Longevity Partners in 2020 as a Sustainability & Energy Analyst in the U.S. headquarters in Austin, TX. She studied Ecosystem Science & Policy, Geography, GIS, and Economics at the University of Miami (FL). In college, she led a 50+ member branch devoted to environmentally-proactive initiatives and kickstarted various programs, including the expansion of recycling at Greek life events, incorporation of EPPs in the campus bookstore, and implementation of an annual plastic-prevention and -education day. She also served on the student representative board during the University’s design and building of its Lakeside Village dormitories, which are certified LEED Gold. She has previously worked as a marketing specialist for a California-based environmental consultancy, and as a clean energy consultant in the northeast.

Talula is a LEED Green Associate who strives to be a LEED AP one day.

Talula adores traveling, gardening, meeting new people, hiking, reading, and watching pro sports. In her spare time, she goes plogging (picking up litter while jogging).

Joel Gehler

Sustainability Analyst (FR)

Joel joined Longevity in 2020 as a Sustainability Analyst. He holds a BSc in Human & Physical Geography and an MSc in International Business Management. He has previous experience in sustainable and inclusive mobility within the public transport sector, where he developed and implemented the CSR strategy for a large multinational transport group.

Joel is a keen music fan and vinyl record collector who enjoys listening to a wide range of genres. He relaxes by playing guitar and reading. He is also a passionate rugby and cricket supporter.