Frederic Waymel (PhD) has 25 years of experience in tunnel ventilation and works for Egis since 2007 as head of the tunnel ventilation department. He also works as a tunnel ventilation project director and expert. Frederic has been involved in the design and commissioning of ventilation systems in many road, rail and metro projects in France and all over the world. He is member of the PIARC Technical committee for tunnels.