In this talk, I will review the construction of five-brane webs that give rise to 5D SCFTs. The Higgs branch of such a 5D SCFT is a symplectic singularity and, in many cases, admits a magnetic quiver description, i.e. the Higgs branch of the 5D SCFT is the same as the Coulomb branch of the quiver. This quiver can be systematically derived using a technique inspired by tropical geometry: one can interpret the webs as tropical curves and compute their stable intersections, the resulting “Cartan matrix” is the defining quiver data. Several examples will be presented.