Combining two Smartlist Accounts into One Account

Hello,

I am trying to combine two text Accounts(one Smartlist, one open text) into One Account. I have tried doing it in the Member Formula of that Account in Dimensions but it didn't work. Would anyone know a way to do this? I am thinking maybe creating a rule and doing a concatenate. This would both in forms and reports. End goal would be in the first column would be "OTHER - POSITION RELATED TAN_TEST". Any help is always appreciated. Thanks!