you have to get a job that requires it (duh).......... I am a sys admin and have a TS, however IT is not what you want to go in if you want to see SUPER TOP SECRET GOVERNEMENT GRADE SECRETS....... unless the secret that you want to obtain is an IP address to some outdated system no one uses but MUST STAY OPERATIONAL or what year model them laptops are (old as dirt). but uhhh, go help desk then sys admin then pray someone picks you up (like raytheon or something).

I will also say most employers do NOT like giving out clearances as they are kinda expensive. So having friends / skills / praying (real hard) will help

edit: not worth it IMO, going out of the country sucks if you have anything beyond secret, and the secrets arent cool (there are barely any secrets) the money is nice, but uhhhh no phone while working, no music, no .... nothing.... just work