[GianFabien]

Have you considered project management roles? I have taken on stints as project manager for IT projects both within the same company as well as by changing jobs. It is less of a leadership role and more of an understanding issues and resolving them through people actually doing the work.

With 15 years experience, you must have had times you were a team leader or even a designer. Those roles can be amplified and used as a stepping stone.