The following are membership grades with post-nominals :
- Affiliate: (no post-nominal) The grade for students and those involved in chemical engineering who do not meet the requirements for the following grades.
- AMIChemE: Associate Member of the Institution of Chemical Engineers: this is the grade for chemical engineering graduates who have not yet met the requirements for full membership.
- MIChemE: Member of the Institution of Chemical Engineers. Entry to this level requires an education of (or equivalent to) a Master's level qualification plus at least 4 years professional experience and a position of responsibility. A competence and commitment report is required plus a technical interview with two senior members of the IChemE. Members normally have Chartered status by one of the routes above.
- FIChemE: Fellow of the Institution of Chemical Engineers. This is the highest grade for members who have the requirements for MIChemE and have achieved a position of some seniority or eminence.