Based in Nyon and founded in 2022, L3M Partners SA is a property investment consultancy firm that is the result of several years of successful collaboration between its three partners.
Our team has in-depth knowledge of the market, excellent financial analysis skills, legal and technical expertise specific to real estate, and the human intelligence required to handle complex situations.
As experts in the specific characteristics of each canton in French-speaking Switzerland, we have a trusted network of contacts among the various players in the profession: investors, notaries, bankers, general contractors and architects, lawyers and property managers.
For property sales: to execute our mandates in a transparent, structured and controlled manner in order to achieve the best possible sale price. To create and maintain a flawless reputation in order to establish relationships of trust with all investors.
For investment & asset management: to source, analyze and negotiate attractive transactions for our clients, with rigorous execution, transparent governance and discipline to achieve the best performance.
To become a reference in investment real estate in Switzerland. In pursuing this ambition, L3M Partners strives for excellence in every mandate while fostering relationships built on trust. We are consistently committed to representing our clients’ interests in the best possible way.
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One for all, all for one
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Our team
Jean-Baptiste Rogasik
Partner
A graduate of the Institut d’Études Immobilières of Geneva and EM Lyon Business School, Jean-Baptiste Rogasik has over 15 years of experience in the real estate sector, mainly in investment and commercial real estate consulting.
Before co-founding L3M Partners, he was responsible for investment property and commercial real estate for French-speaking Switzerland at one of Switzerland’s major real estate companies for four years. He is also a member of the Royal Institution of Chartered Surveyors (RICS).
Pierre-Edouard Guillier
Partner
A graduate engineer from École Centrale Marseille with a master’s degree in Renewable Energy from RWTH Aachen University, Pierre-Edouard Guillier initially worked for three years at a family office in Geneva, acquiring and developing industrial assets.
He then spent four years working in the investment sales team of a major Swiss real estate group before co-founding L3M Partners.
In 2025, Pierre-Edouard obtained the Swiss Federal Diploma as a Real Estate Property Manager.
Maxime Veysset
Partner
With a degree from the Institut d’Études Immobilières of Geneva and a Master’s in Finance and Private Equity from the London School of Economics (LSE), Maxime Veysset began his career in real estate at a Geneva-based family office specializing in the acquisition of industrial and commercial properties, with a particular focus on projects with high value-added potential.
He then joined the investment sales team of a major Swiss real estate group for four years before co-founding L3M Partners.
Armand Doglio
Analyst
With a bachelor’s degree in political economy and a master’s degree in finance from HEC Lausanne, Armand joined L3M Partners as part of his end-of-study internship. He completed his master’s degree with a thesis on property valuation methodologies, directly related to his internship experience.
Since 2024, he has been working as an analyst within the team. His role consists of providing technical and analytical support in the marketing of properties, preparing all sales documentation, analyzing new opportunities and proactively following up with investors.
Guillaume Papaux
Analyst
Holding a Master’s degree in Management (with a focus on Strategy and Organisation) from HEC Lausanne, Guillaume joined L3M Partners as an intern analyst in early 2025, before becoming a permanent member of the team as an analyst in late 2025. During his student years, he worked for three years at the Société Coopérative d’Habitation de Lausanne (SCHL), where he served as a technical department assistant. This experience gave him a solid foundation in real estate and sparked a strong interest in the sector.
His role at L3M Partners consists in providing technical and analytical support in the marketing of properties, preparing all sales documentation, analyzing new opportunities and proactively following up with investors.
Maylis Gonthier
Marketing & Communications Manager
With a bachelor’s degree in business economics and a certificate in digital strategy, Maylis has developed her expertise in a variety of environments, including watchmaking, media, hospitality and, finally, communications agencies.
Initially working behind the scenes, she officially joined the team at the end of 2024 as Marketing and Communications Manager, with the mission of strengthening the positioning and visibility of L3M Partners. Her strategic vision and cross-functional approach enable her to develop targeted actions while promoting the image and projects of the organization.