Job Description Your mission during this flight: You will be in in charge of tracking the evolution of the design of the aircraft with all topics related to the aircraft's mass and center of gravity, and you will ensure that the mass targets and proper performance of the aircraft can be ensured. This role is also responsible for the monitoring of W&B process, tools and to support guidance to internal/external stakeholders. In detail: Develop, maintain, and improve weight and balance tools. Support definitions of aircraft preliminary architecture for new projects. Perform and support weight control throughout aircraft development. Perform mass properties estimation and bottom-up calculations. Define and/or support weight and balance envelope definition. Perform R&O management regarding weight and balance. Document W&B results for internal use and certification purpose.