How do I make a switch team with roblox groups?

I want to make it when you join the main Roblox group you spawn inside the base if your not in the group you spawn outside the military base, So your in the main group And there is sub groups so if your in the main group and you get accepted into the airforce You spawn in still as the personell team (Main Group) But u can click a button on the side of the screen and switch to a diffrent team/Division But your rank in the main group still shows in your nametag above ur head and when you switch teams Your rank in that subgroup shows to but the subgroup rank doesnt show in your name while your in the personell team but only when you switch to that division Example: [PFC] 23_KAMDAYOUNGAN Private First Class, Personnel [PFC] Is the rank in the main group But te rank in the group is called [PFC]Private First Class But i want it to say [PFC] Then there name Then Private First Class, Then there team that there on And When when yo switch teams so lets say i switch to AirForce team I want it to say [PFC] 23_KAMDAYOUNGAN [ABA]Airman Basic, Airforce So There rank in the main group still shows by there name but when they switch teams Which they have to be in the roblox group to switch to that team so if your not in the airforce team you cant switch to the airforce team anyways [ABA]Airman Basic Is there rank in the subgroup and it shows it If anyone can tell me on here or on discord 23_KAM#2798 It would help i have no clue how to do it i already made the groups to