Over the past two decades, the space industry has undergone a radical transformation, shifting toward reusable concepts that have significantly reduced mission costs. Space Tugs are also part of this vision being reusable cargo spacecraft designed to provide transportation services in cislunar space. The Space Tug aims to build on the interest generated by the Artemis program and thus meet the growing demand for scalable logistics architectures to support the Lunar Gateway and future lunar surface activities. To do so, it will leverage reusability, modular mission planning, and potentially in-space refueling, reducing recurring launch demands and overall logistics costs, while meeting delivery schedules and supply requirements.