Designing a custom, high-performance, fiber-coupled laser module requires not only an intimate knowledge of all of its components, but also the ability to make adjustments on a submicron level. Sheaumann teamed with Tesat-Spacecom in 2015 to develop a space-qualified laser module which is now used in LEO and GEO satellites. This intensive three-year project required an enhancement of Sheaumann’s flagship 2-Pin “SheauPac” module to perform continuously in the extreme environment of space for over 20 years without repair or recalibration. Some of the customizations of the module involved overcoming obstacles where an off-the-shelf product would have performed unsatisfactorily.