As in previous editions, the 2018 Space Propulsion Conference held in Seville (Spain) last May was once again a meeting place for users of EcosimPro/ESPSS. The customary user workshop was held as usual to present new features and upcoming developments as well as to gather suggestions from users. The technical sessions included several papers based on using ESPSS, showing its usefulness and confirming the users’ ongoing interest in this software. Examples of the papers given include the following: design of a round-trip mission to the moon with a hybrid propulsion rocket (DLR), research into two-phase cryogenic flows and their application to liquid propulsion rockets (Ariane Group), the passivation of helium remaining in orbiting satellite propulsion systems (OHB), implementation of a two-phase pipe in ESPSS (VKI), and the development of an innovative system for regulating xenon for electrical propulsion (Air Liquide). The articles mentioned here along with many other papers on space propulsion are available in the “Papers” section of this website.