A
- Administrative Analyst
- Administrative Technician
- Advisor
- Advisory and Process Management Technical Branch
- Advisory Council
- Advisory Technical Branch
- Aerodrome Inspection Technical Branch
- Aeronautical Products Design Certification Branch
- Air Operators Continuing Airworthiness Certification Technical Branch
- Air Services Agreements Technical Branch
- Air Transport Oversight Technical Branch – RBAC 121
- Airport Engineering Technical Branch
- Airport Infrastructure and Operations Technical Branch
- Airport Infrastructure Granting Branch
- Airworthiness Standards and Innovation Technical Branch
- Airworthiness standards for normal category rotorcraft
- AVSEC and Facilitation Branch
- AVSEC Oversight and Certification Technical Branch