Might be slightly off-topic, but wanted to offer my two cents regarding dual-citizenship and renouncing non-US citizenship.The only challenge I see for you Enlisting as a CTI is getting a TS/SCI which will include renouncing your non-US citizenship and relinquish your non-US passport(s).
On another note and despite the nonsense, as a non-military person, you can hold dual-citizenship and associated passports. It's something to consider. When you do become a dual citizen (your new US citizenship and your original) and are "dual doc'd" (holding a US passport and the passport of one or more passports from other countries) as we say, you will be highly marketable in the private sector, especially with your stated pedigree.
I'm assuming Jacobthemarine is a South Korean citizen waiting for naturalization, since he listed Korean DLPT.
Once he gets naturalized, he will have to forfeit his Korean citizenship because South Korea does not legally recognize dual/multiple citizenship for males. I know this, because I held South Korean citizenship until I got naturalized last year. I had to visit a Korean embassy to submit a request to forfeit my Korean citizenship (they don't even automatically do it for you.. smh). I chose to be proactive and get this done and out of the way, so that I won't run into any issues later on during my TS/SCI process.
Even if somebody were to hold dual citizenship (US/Korean), he/she would have to get a waiver for TS/SCI. Fortunately, South Korea is an allied nation and wouldn't necessarily be a huge obstacle.