How to join dba_users table with HRMS oracle tables

I have request and i would like assistance. I have created this query:

 select username, profile, r.GRANTED_ROLE, decode(account_status,'OPEN','ACTIVE','EXPIRED','EXPIRED','INACTIVE') "ACCOUNT STATUS",created, 
 s.PTIME "Password Change Time", last_login 
 from dba_users, dba_role_privs r, sys.user$ s
 where username=r.grantee(+)
 and username=s.NAME
 order by 1;

So i am ok with it, but i wanted to know how can i join personal database accounts with some of Oracle’s HRMS table in order to get for them details like email, employee_id etc.