The objective of this paper is to investigate mechanical and material properties of EOS MS1 maraging steel (as-built, machined) samples, which were manufactured by the powder bed fusion process in different orientations in an EOS M280 machine. The MS1 material is well known for its high strength, ductility, machinability, and high fracture toughness. A literature review related to mechanical properties of printed EOS MS1 Steel found that there are no available studies of both building direction and further machining on mechanical and material properties of this material. To address this gap, mechanical property tests including tensile, hardness, Charpy impact, bending, and compression, as well as SEM analysis of microstructure, were performed to understand the influence of both build direction and post-processing effects. The results showed there was an impact of machining and build orientation over mechanical and material properties. Results are statistically analyzed to understand the confidence of level.