Question regarding living overseas and Dual Citizenship

Currently living overseas - In the process of moving back to the U.S. I have lived overseas for many years, have a dual citizenship (FiveEye Nation, close ally) and am looking at some work that would require a T3 Secret. I will need to declare my foreign contacts/Bank accounts but how do they handle foreign background checks? Is this something I will need to provide them(Like get my own police background check done here and then provide them with a copy)? Or is it something the investigators do themselves?

I should also ask, do T3 Investigations go beyond a criminal background check? I was once ‘questioned’ by police(Overseas, not U.S Police) for online clothing purchases and social media posts that were political in nature, I wasn’t charged nor was the chat mandatory, it was 100% voluntary, no fingerprints, no warning, citation, fine etc. wasn’t recorded/no notes were taken, they just wanted to make sure I wasn’t mixed up with the wrong crowd, which I wasn’t. I just want to make sure it won’t disrupt or cause problems for me.

From what I’ve heard it is very difficult to do any kind of background checks overseas, even with close allies. About all that can be done is ask the embassy security officer to do some kind of name check with their local law enforcement counterparts. I think you will also need to provide US citizens (or at least LPR) references who are currently in the US.

Depending on the agency, Dual citizenship could cause problems. Where I work, it’s an automatic denial.

But do you have an opportunity to renounce the other citizenship?

Yes, you can renounce. They do seem to accept that as mitigation.