Pierre Demonsant

About Pierre Demonsant

Pierre Demonsant is a founding figure at Planisware, which he co-founded in 1996 with Yves Humblot, Matthieu Delille and François Pelissolo. He currently serves as Chairman of the Board of this listed software company, where he plays a key role in shaping strategy and supporting international expansion. His career is closely tied to the entrepreneurial story of the group, of which he remains one of the principal architects. Before creating Planisware, Pierre Demonsant began his career at Syseca, the information systems subsidiary of the Thales Group. In 1992, he developed a project planning software solution that was later adopted by major industrial players such as Arianespace and EDF. This early technical and commercial success led him to establish a Thales spin-off that became the foundation of Planisware. The company soon secured Sanofi as its first major client, confirming the relevance of its positioning in project portfolio management and enterprise software innovation. A graduate of École Polytechnique in Paris, with a specialization in artificial intelligence and operational research, Pierre Demonsant has the profile of an engineer-entrepreneur well suited to complex software environments. His expertise spans product strategy, the industrialization of B2B solutions, corporate governance and international growth. Within Planisware, he has long embodied continuity between the original technological vision and the development of a company that has become a recognized market leader across several continents. As Planisware’s governance evolved, his employment contract as Product Architect ended when the company converted into a public limited company on 26 September 2023. On the same day, he was appointed as a director and then named Chairman of the Board. This transition reflects a shift from operational responsibilities to a more strategic governance role, consistent with the company’s maturity and its status as a listed business.