The Institution of Incorporated Engineers, Sri Lanka consists of the following classes of Membership:
Corporate Members
- Fellows
- Members
Non Corporate Members
- Honorary Fellows
- Associate Members
- Students
In terms of bye laws of the Institution of Incorporated Engineers, Sri Lanka following classes of members of the Institution shall be entitled to use appropriate designatory abbreviations as mentioned below.
| Honorary Fellow | Hon. FIIESL | Honorary Fellow of the Institution of Incorporated Engineers, Sri Lanka |
| Fellow | FIIESL | Fellow of the Institution of Incorporated Engineers, Sri Lanka |
| Member | MIIESL | Member of the Institution of Incorporated Engineers, Sri Lanka |
| Associate Member | AMIIESL | Associate Member of the Institution of Incorporated Engineers, Sri Lanka |
In addition to the above, Corporate Members (Fellows and Members) of the Institution; in terms of the Bye Laws; entitle to use designatory title of “Incorporated Engineers” with abbreviations IEng. at the end of their names.
The guidelines has been developed by the Institution of Incorporated Engineers, Sri Lanka and approved by its Council of Management in order to assist the prospective candidates in the application process for enrolling in to following classes of membership;
Honorary Fellow
The candidate for election to this class of Honorary Fellow membership shall satisfy the Council that he shall:
Uphold the prestige of the Institution
And
Have rendered valuable service to the Profession
And
Have furthered the objectives of the Institution and deemed by the Council worthy of such election
Fellow
The candidate for election to this class of Fellow membership shall satisfy the Council that he shall:
Be not less than thirty-five (35) years of age.
And
Have been in the class of Member for a continuous period of five (5) years prior to the date of application to this class of Membership
And
Have been holding an executive position for over a period of ten (10) years in a recognized establishment acceptable to the Council.
And
Have contributed significantly to the development of the Institution
Member
Academic qualification for this category is a three year full time engineering technology diploma or any equivalent qualification conducted by an academic institution and accredited by the Council of Management of IIESL after successful completion of twelve years of schooling, or equivalent
And
Minimum of Seven (7) years of post- qualifying work experience in the field of Engineering Technology with required competencies
Or
Five (5) years of post-qualifying work experience in the field of Engineering Technology with required competencies for Associate Members
The Member:
- Focuses on interactions within the system
- Modifies and adapts established engineering practices
- Advances engineering technology
Associate Member
Academic qualification for this category is a three year full time engineering technology diploma or and equivalent qualification conducted by an academic institution and accredited by the Council of Management of IIESL after successful completion of twelve years of schooling, or equivalent with required competencies
The Associate Member:
- Focuses on specific elements of the system
- Works within codes and applies established practices and procedures
Student
Should have successfully completed 12 years of schooling and are aspiring to become Incorporated Engineers. This category of membership is not available in International Branches of IIESL.