Hiya Muuuuh36! Welcome to the forums! I am sorry for the trouble with accessing these specializations in The Division 2. To verify, you are missing the "Gunner", "Technician" and "Firewall", correct? This has been forwarded to our development team for further investigation. In the meantime, you should still be able to change the specialization in Washington after you finished the campaign. If you run into any issues accessing these 3 specializations after completing the campaign, please
create a support ticket with our team to help review this further. Thanks!