Just because a career or a spec has a name doesn't mean that you are what that name is. A career is just a set of skills, a spec is some skills and talents. That's all they are. Yes there is some fluff to give you ideas on how to play your character or write up your background, but there is nothing saying you have to play a thief as a thief. Government agencies higher people that were hackers or have the skill set to be amazing hackers. Being a slicer doesn't make you a criminal. Undercover agents have skill sets that mirror criminals but it doesn't make them one. Back into starwars fluff examples bounty hunters almost all exclusively worked for the empire or for sector security.
You can play as sector rangers alot easier with EotE then I imagine you could with AoR. You are a sector ranger. Pick a career and spec that have the skill set and talents you want. Now rename it Sector Ranger. The only reason you may want to wait for AoR to run it is so you can have duty instead of obligation. The EotE book is full of villainous NPCs to use as the criminals you are tracking down and bringing to justice.