Thomas Dequercize
Assistant Sales - Listed & Hybrid Assets at Sienna Investment Managers | Paris, Île-de-France, France
Thomas Dequercize’s Email & Phone Number
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Thomas Chauveau de Quercize serves as Assistant Sales for Listed & Hybrid Assets at Sienna Investment Managers, a Paris-based multi-expertise asset management firm under Groupe Bruxelles Lambert. He earned an MSc in Finance with a focus on Investment Banking from Grenoble Ecole de Management. In his capacity within the financial services sector, he facilitates bespoke investment solutions for a platform that oversaw approximately €33 billion under management as of late 2025.
BEST APPROACH TO REACH Thomas Dequercize
Contact him through LinkedIn or his personal email with a concise value proposition explaining how your solution can streamline sales workflows or investor relations specifically for Sienna’s hybrid and listed asset funds.
Assistant Sales - Listed & Hybrid Assets at Sienna Investment Managers in September 2025 - Present
Assistant Sales - Listed Assets at Sienna Investment Managers in January 2025 - September 2025
Client Service and Sales assistants at SCOR Investment Partners in June 2024 - November 2024
Responsable partenariats at GEM Finance Society in May 2023 - May 2024
Assistant Responsable Conformité et Contrôle Interne at SILEX in June 2023 - July 2023
Analyste de Gem Finance Society at GEM Finance Society in September 2022 - May 2023
Grenoble Ecole de Management, Programme grande école, November 2026
Lycée Michelet, Vanves, Classes préparatoires aux grandes écoles (CPGE), November 2026
lp du sacré-coeur, Baccalauréat sciences et technologies du management et de la gestion, November 2026
Sienna Investment Managers is a multi-expertise asset manager of the publicly traded investment holding company Groupe Bruxelles Lambert (GBL). With a team of around 150 professionals, Sienna IM builds bespoke and innovative solutions for its clients, with purpose, spanning listed and private assets. As of end 2025, the Group oversees circa €33 billion under management, of which more than 90% (on the SFDR eligible scope) are classified as Article 8 or 9.
Discover more about Sienna Investment Managers
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Juriste at Sienna Investment Managers
(September 2025 – Present)
What is Thomas De Quercize email address?
Email Thomas De Quercize at [email protected]. This email is the most updated Thomas De Quercize's email found in 2026.
How to contact Thomas De Quercize?
To contact Thomas De Quercize send an email to [email protected]. (updated on November 16, 2025)
What company does Thomas Dequercize work for?
Thomas Dequercize works for Sienna Investment Managers.
What is Thomas Dequercize's role at Sienna Investment Managers?
Thomas Dequercize is Assistant Sales - Listed & Hybrid Assets
What industry does Thomas Dequercize work in?
Thomas Dequercize works in the Financial Services industry.
