The development and professional support of a comprehensive learning journey is the core element for the sustainable establishment of uniform, professional internal company negotiation processes and the associated increase in negotiation performance. For a client in the automotive industry, we conducted a status quo analysis to identify current procedures and challenges in the area of purchasing negotiations. Subsequently, we developed an individual training and coaching concept with supplementary digital materials for more than 500 buyers from different departments and teams. Building on each other, modules on the NAP methodology, negotiation-specific business games and in-depth training as well as personal coaching sessions with NAP consultants and in-house lead coaches enabled the participants to make an ideal transition to the new process structures. These have demonstrably led to an optimization of negotiation results.