Spoiler warning (kind of):
There is a guy you meet as you progress the story, his name is Hamish. As you're progressing the game, he will eventually give you side quests to do. To get this achievement you need to do these missions: Third Degree Burns, and then Parks and Reclamation.
Once you are done Parks and Reclamation, the achievement should pop. I did this after beating the game, so I can't say for sure when they show up during the main questline progression.