The union representing CDC is AFGE local 2883. You're eligible to join if your SF50 has code 7777 in box 37. You can join here: https://www.afge2883ga.org/ Bargaining units are subsets of union members. There is currently no unit at CDC. Non-bargaining union members have benefits: https://www.dol.gov/sites/dolgov/files/olms/regs/compliance/csrafactsheet.pdf