ESCAPE-2 organised a workshop oh fault tolerant algorithms and resiliency approaches on the 23rd and 24th of January 2019 in Milan, Italy. The workshop consisted of a first day of seminars by experts in systems resilience and fault-tolerant numerical algorithms and a second day of scientific discussions of the same experts with project participants. The presentations gave a detailed picture of the state of the art in the field and established connections with operational workflows and numerical algorithms used in atmospheric applications.