Most missions in Cycle Frontier are pretty self-explanatory, but Doing the Work Part 1 gives you very little directions…
Beginner's Guide Where to Find the Sos Sign – Cycling Frontier Do the Job Part 1 Task
Doing the job Part 1 is a mission that you may have a little trouble with if you expect a clear goal. But the missions are actually incredibly easy if you know what you're doing.
The mission description mentions that the SOS sign you're looking for can be found on some sort of beach. The beach in question is on the Bright Sands map, south of the water facility, a little to the left. The location will have a lot of rubble scattered around, so it should be easy to find. Simply arriving at the location will end the mission.
Being a PvP game, the main source of complications will naturally be other players. While this location isn't exactly a hot spot when it comes to resources, you can get unlucky and stumble upon others doing the same quest as you.