USPS Nationwide job openings for City Carrier Assistants, (CCA) & Rural Carrier Associates, (RCA). Click HERE to search for local positions and apply. Please refer to the USPS Application Process for application details, tips, and follow-up information. Tips for Applying: You’ll need to create an account to get started. If you already have an account, login and enter “Trainee” into the Search Keywords box to view current openings. After you create an account, you’ll receive two emails: 1 - An email confirming your profile is complete 2 - A confirmation email after your application has been successfully submitted