So as I’ve outlined all of this here before in other posts:
I’d also add to it that roles with defense contractors like Security Rep, Personnel Security Admin, and Security Analyst roles are a good fit for BIs as well.
I would strongly advise you to not stay as an investigator for more than 2 to 3 years tops, and as soon as you are settled into being an FI (if you go that route), get active on LinkedIn and begin figuring out where you want to take your career. Also begin certifications or courses or something of the sort ASAP too.
Being an FI is no longer a good long term career for most, but can be a good stepping stone for certain people in certain situations.
View the field as a paid internship that you use to get a clearance, get some experience, etc. Because that’s what this field now is for many.