IMESA provides for two main categorisers and not less than nine categories of members as follows: 

Corporate Members:

• Professional Members (CP)
• Fellows (CF)
• Honorary Fellows and Honorary Members (CHF and CHM)
• Retired Corporate Members and Fellows (CR)

Non-Corporate Members:

Non-Corporate Members:

• Students (NS)
• Graduates (NG)
• Associates (NA)
• Affiliates (NF)
  • Platinum (NFP)
  • Gold (NFG)
  • Silver (NFS)
• Retired Non-Corporate Members (NR)