Leadership Team

Excelya>About us>Leadership Team
CEO & Co-Founder

François Moisson

François Moisson cofounded Excelya in 2014 with Frédéric Paqueville and, together, they drive the Executive Committee. Imbued with the entrepreneurial spirit, François began his career in consulting to better understand every aspect of successfully running a company. There, he worked with Frédéric, who shared his vision of creating a company in which all team members would actively participate in its development. The health sector naturally called through its ability to touch the lives of so many. After a few years in business development, he left to create Excelya which is now 900-strong across Europe.

Today, he defines Group strategy with Frédéric and ensures that Excelya’s original DNA – to care for its team members, clients and patients while delivering on its promise of excellence – is carried in each of its actions. He has a Master of Business Administration from IAE Paris La Sorbonne and an Engineering degree from Arts et Métiers Paristech.

CEO & Co-Founder

Frédéric Paqueville

Frédéric Paqueville cofounded Excelya in 2014. He now leads the group with François Moisson. Together, they are in charge of defining company strategy and the selection of new markets, offers and potential acquisitions. Before creating Excelya, Frédéric worked as Business Manager for a consulting firm. He left to create a company that would align with his desire to take good care of people while delivering outstanding business results. This was the genesis of Excelya. With François, they set out to produce a virtuous circle of people taken care of at work, their increased productivity and strengthened business. Since then, they have led Excelya from 2 to 800 employees, taking the company from a start-up to a European leader.

He has a Master of Business Administration from IAE Paris La Sorbonne and an Engineering Degree from Arts et Métiers Paristech.

Nathalie Doize Operations Manager Excelya
Chief Operating Officer

Nathalie Doize

Nathalie Doize has more than 30 years of experience in drug development working for both CROs and pharmaceutical companies. She oversees our operations and project delivery, ensuring excellence and the highest quality for our clients.

Nathalie joined Excelya from Syneos Health, where she served as Vice President of Operations and was responsible for the operation and oversight of operational teams in Europe and Asia Pacific. Before that, she served in a variety of roles in increasing seniority, including department management for Mapi Group, inVentiv Health Clinical and i3 Research. She has a nursing and pediatric nursing degree from Paris Nanterre University.

Chief Commercial Officer

John O'Brien

John joined the Excelya team as our Chief Commercial Officer in 2022 and is based in the Paris office. He has over 20 years of commercial experience, with a main focus in CRO business development.  John leads our commercial activities across Excelya’s business solutions and is responsible for ensuring the profitability, growth and the strategic direction of the department, including Business Development, Sales, Proposals and Marketing.

Prior to joining Excelya, John was Head of Global Business Development at Cmed Clinical Research and has previously held business development roles at Chiltern, Theorem Clinical Research and Parexel. This, along with a career encompassing Europe, the Americas and the Asia-Pacific, has given him broad drug development experience in international markets. John has Bachelor Degrees in Commerce and in Science from the University of Auckland, and a Master of Business Administration from ESMT Berlin.


John O'Brien Excelya
Chief People Officer

Philomène Sammarcelli

Philomène serves as Chief People Officer. She has demonstrated great expertise and commitment to Excelya since August 2021, initially in Talent and Compensation Management, and Learning and Development global functions. Heading the People Team, she oversees the Human Resources strategy to move the organization forward and drive the growth and transformation of the company.

She is responsible for developing and implementing innovative HR programs, building high-performance teams, and for fostering an inclusive and collaborative workplace culture where every employee feels valued and empowered to contribute their best to the business.

Prior to that, she endorsed a variety of roles in fast-growing and changing environments, from Global Compensation & Development Management to HR Business Partner. Philomène brings extensive experience of change management in matrix organization, talent management, HRIS and employee development programs. She is also Predictive Index certified, skilled at coaching leaders and facilitating team dynamics.

Quality Assurance Director

Vivy Anagnostopoulou

Vivy ensures compliance, oversees quality management, supervises training and manages company-wide policies, procedures and insfrastructure. She has over 30 years of experience in Quality and Compliance in the health sector, including 15 with our Central European office. She has acted as Quality Assurance Director since 2015.  

Vivy has more than 30 years of experience in drug development working for both CROs and pharmaceutical companies. Before that, Vivy worked for the major Greek players in the health industry, such as Gerolymatos International or ELPEN Pharmaceutical. She has significant experience in the creation, management and continuous improvement of quality management.

She holds a Bachelor Degree in Chemistry and in Economics and a Ph.D in Analytical Chemistry, obtained at the University of Athens.

Vivy Anagnostopoulou Quality Assurance Director