Longevity Partners

Étienne Cadestin

Founder & Managing Director (U.K.)

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.

In 2017, 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 one daughter.

Stéphane Carpier

Managing Director France & Benelux (France)

Stéphane is Managing Director of France and the Benelux region.

For the last seven years, Stéphane was Technical Director in charge of the entire Gecina portfolio, the fourth largest property company in Europe, with more than 1 million sq m of real estate under his leadership.

He successfully reduced CO2 emissions by 40% across the portfolio and certified more than 800,000 sq m of assets.

He is a trained engineer with technical expertise in green building design and construction and management.

Stéphane is often invited to speak at round tables and symposiums to share his views on responsible property investment in France.


Giselle Crowder

Innovation and Energy Analyst (U.K.)

Giselle is an Innovation and Energy Analyst at Longevity Partners. She graduated from the University of Surrey with an MSc in Renewable Energy Systems Engineering and previously worked in the Sustainable Design and Engineering team at ATKINS global.

Her multi-disciplinary background brings a specialist expertise to renewable energy systems design (PVSOL modelling), energy efficiency analytics (LED retrofit) and sustainable certifications of refurbishments (SKA certification) projects.

Giselle is an avid lacrosse player and trekker having climbed Kilimanjaro at the age of 16.

Retha Fourie

Group Financial Controller (U.K.)

Retha joined the company in 2011 and played a key role in setting-up the Long Harbour Ground Rent Fund. Retha is responsible for the maintaining the management accounts and payroll for all entities across the platform, performing cash and working capital reconciliations, as well as the accounting and approval of completion statements for corporate and property acquisitions at the ground rent fund level. Her responsibilities include liaising with external auditors and overseeing the finance function of the group's ground rent property management and rent collection company.

Retha is a part qualified ACCA (Association of Chartered Certified Accountants) accountant, a registered member of SAIPA (South African Institute of Professional Accountants) and has a degree in Cost and Management Accounting.

Divya Hariramani

Innovation and Energy Analyst (U.K.)

Divya joined Longevity Partners in 2017 after completing a fully funded master’s in Renewable Energy Engineering in Lisbon, Barcelona and Stockholm, which focussed on energy in the Built Environment.

With previous experience in the energy sector working with the likes of EOn, she is now specialising in energy efficient solutions for Longevity’s clients and is leading their building energy modelling services.

Alain Kilajian

Sustainability and Energy Consultant (U.K.)

After graduating from the University of Pennsylvania with a degree in Earth and Environmental Sciences, Alain was awarded a Fulbright Scholarship to research the effects of mining on agricultural communities in northeast Thailand. He then completed an MPhil at the University of Cambridge in Engineering for Sustainable Development.

With over five years’ academic and field research in environmental management, Alain joined Longevity Partners in 2017. He specialises in asset-level sustainability and energy optimisation, and leads their BREEAM In-Use and New Construction service lines throughout Europe.

Anthony Maguire

Senior Energy Consultant (U.K.)

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.  

Douglas McKenzie

Group Finance Director (U.K.)

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).

Aurélie Rebaudo-Zulberty

Head of Strategy and Reporting (France)

Aurelie is Head of Strategy and Reporting for Longevity Partner’s French office.

For the last five years, she was the Head of Corporate and Social Responsibility at Gecina, the fourth largest property company in Europe.

Under her leadership, Gecina became a GRESB sector leader as well as the first French real estate company to implement Science Based Targets. Prior to her role at Gecina, she was responsible for sustainable purchasing at Veolia Environment, to design and implement innovative practices across the group.

She joined Longevity Partners to support businesses across Europe to reach the highest standards of sustainability and ensure they have robust reporting frameworks.

Aurelie graduated from HEC and is an expert in sustainable strategy development, complex property performance management and reporting.

Lois Salem

Business Growth Associate (U.K.)
As Business Growth Associate, Lois is responsible for delivering strategic intelligence to expand the business internationally, engaging with existing customers, and developing relationships with new clients to lead to new sales.
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.

Alexandra Singleton

Climate Adaptation Consultant (U.K.)

Alexandra advises real estate investors and developers on climate change resilience measures for their assets using her analytical and mapping skills.

Alexandra has a BSc degree in Geography from Ludwig Maximilian University of Munich and an MSc in Environmental Planning from Technical University Berlin.

In her spare time she enjoys practicing yoga, travelling and hiking in the mountains.

Fan Yi

Electric Vehicles Analyst (U.K.)

Fan has over four years of research experience in the energy sector, and recently joined Longevity Partners in 2018 from the University of Bath where he obtained his PhD.

He has been involved in several international power-related projects including the EU’s Horizon 2020 aiming at a smart and sustainable European future.

He specialises in electric vehicles, energy storage and solar PV with considerable analytical and mathematical modelling knowledge, and has additional expertise on customer behaviour study and business model development.