Nonlinearity is a frequent occurrence in engineering structures: elastomeric materials, gaps, gears, friction. It introduces distortions in frequency response functions and can make your stabilization diagram difficult to interpret. In addition, nonlinearity can induce new phenomena with no linear counterpart such as modal interactions and bifurcations. Created in 2016, NOLISYS is a startup active in the field of nonlinear vibrations. It is the result of more than 15 years of research carried out under the supervision of Professor Gaëtan Kerschen at the University of Liège, in Belgium. Building on advanced experimental and computational techniques, the competence and activities of our group focus on the detection of nonlinearities in measurement data and the assessment of their impact on the structure's dynamics. Our technologies power nonlinear test campaigns and simulations with applications in aerospace, automotive, civil and mechanical engineering.