Within the 4th Early Career Researcher Workshop (formerly named Young Scientist Workshop) on May the 11th, 50 young scientist met in the TAB building to present and discuss their work and contribution to MAPEX. Beside three keynote presentations from Gerrit Dumstorff (FB1, IMSAS), Nils Ellendt (IWT, SFB1232) and Andrea Kirsch (FB2, CKfS) 20 master students, PhD candidates, and postdocs gave a short view on their work in a lightning presentation followed up by poster sessions. “It is interesting and exciting to see, what people are dealing with in their daily scientific work and how they actually define scientific work”, said one of the participants. Another participant praised the relaxed atmosphere, where‚ Master students, PHDs and Postdocs get together. A highlight of the workshop was the last presentation “Processes at fluid interfaces” by Mark Avila. The new Head of the ZARM gave an exciting insight into the scientific work of his group. The workshop finally ended in the city with a slightly different presentation: A night watchman lead the participants through the old city of Bremen, telling stories about the city by walking from the marketplace over the Schlachte to the Schnoor Viertel. Alltogether the workshop was again a successful event which will be continued in autumn with the 5th workshop, where people from industry will meet the MAPEX Early Career Researchers.