Here is the full list of all 11 Satellite Repairman achievements.
Win a mission building more than 15 buildings in a map
Complete all research technologies
Repair a satellite with less than 5% health
Satellite destroyed while docked
20min in Endless mode
High altitude sat with EMP, Cloak, Fuel and GPS
Campaign Complete
5 missiles intercepted by EMP in one game
Win a mission spending over 70% of time in the air