The future will see an increase in missions headed for deep space. Advanced payloads will require higher data rates in more efficient spacecraft. Conventional space communication is facilitated through RF technology. Although it is very reliable, doubts arise on its future sustainability because of limited bandwidth, inefficiency and a saturated spectrum. Deep space optical communication (DSOC) can mitigate these issues and may present a sustainable future solution. In this thesis work, a concept is generated for the link and optomechanical design of a Deep space Optical Terminal (DOT), which is meant to be able of high data rate laser communication between the Moon and Earth. Emphasis lies on link analysis and design parameters required to realize the link. Subsystems and budgets are highlighted. The design process is discussed using systems engineering methods and tools.