Kytom integrates change management from the programming phase, and not at the end of the works. Our project managers, present in 11 offices across France and Spain, deploy a three-tier setup: sponsors (executive committee, HR, building/facilities management), field relays (managers and ambassadors), and users. Across 1200+ clients supported since 2006, we have calibrated a regular communication cadence (every two weeks), 1:1 immersion workshops on a model, and a ready-to-use manager kit. The Vitra and Herman Miller furniture references are presented in the showroom to make the future daily life tangible. Measured result: 85% user buy-in on day one, versus an observed sector average of 55%.