Jonathan Bros, founder of Belief System

Expertise that informs the firm’s work

His work focuses on the issues of image, reputation, transformation and influence. He links the council to the leaders' understanding of the public and the concrete consequences of a decision. Behavioral economy is one of his subjects of interest and publication.

Belief System presents its accompaniments based on the challenges of the organizations: communication strategy, reputation, leadership speech, media relations, public affairs, GEO, geopolitical transformation and decryption. The founder's path illuminates this method; the firm's commitments remain defined in each mission.

A background in advisory work and business leadership

Jonathan Bros worked at Ogilvy, Publicis Conseil and TBWA Corporate, and then held management positions within Proximity. Public professional sources also trace development and partnership responsibilities at Angie.

These elements describe stages of the journey, not current functions. The nomination papers listed below allow them to be placed in context. His training includes a course at Montpellier Business School and Westminster Business School.

Teaching and knowledge sharing

Jonathan Bros taught corporate communications at Sciences Po Paris (2014–2017) and strategic communications at CELSA (2019–2023).

The transmission continues in the firm's contents: analyses, notes to the management committee and practical tools. The objective is to make complex issues usable in decisions and in the work of the teams.

Sciences Po Paris · CELSA — Sorbonne Université

Publications and professional press coverage

In the Journal du Net, Jonathan Bros published "Communicating in a Period of Economic Recession" in 2022. His professional profile and a presentation published in 2024 also document contributions to Harvard Business Review France on behaviour and communication.

Professional publications have covered several stages of his career, including CB News and Montpellier Business School Alumni. The sources below distinguish his authored articles, professional profile and appointment coverage.

Contact Belief System

For a mission, a request for intervention or an exchange on a communication issue, the contact point is the firm: jb@beliefsystem.fr. The framing specifies the objective, scope and expertise required.

Video interviews

Two B SMART interviews recorded during his time at Proches, before Belief System was established. Videos are in French.

Selected publications

• Journal du Net · Communiquer dans une période de récession économique (2022)
• LinkedIn · Un monde hybride, une réalité en crise ! (2024)

Contributions to Harvard Business Review France

Five articles by Jonathan Bros on artificial intelligence, behaviour and organisational change. Original articles are in French.

View the HBR France author profile ↗