Those who apply and gain Member class of the Society can use the designatory letters MSLL.
Applicants must hold, as minimum CIBSE Affiliate membership. Applications must be made online, and the following information and documents will be required when submitting your application.
The following information.
1. Basic Application Information (Name, Address, DoB, Email Address, Telephone Number).
2. Proposers Name and Email address. NB The proposer must be:
- A Member or Fellow of SLL,
- A Member or Fellow of CIBSE.
- Registered CEng with any Engineering Council nominated institution, or
- Professionally registered within the construction industry (CIOB, RICS, RIBA).
If none of the above are available to you your proposer can be your employer (if self-employed this could be an employer from a project client, you have worked with).
NB A direct family member or a member of CIBSE/SLL staff cannot propose an applicant. They must have known you for two years.
The following documents in separate files.
3. Qualification Certificates and transcripts in English (upload document(s)), also member certificates from other Professional Institutions.
4. CV – including any relevant education, CPD and employment details including percentage of time working in light and lighting, and specific roles/tasks undertaken (upload document). Additional information on types of CPD.
5. Either a 2,000 to 2,500 words Engineering Practice Report or if already a Chartered Engineer a 1,500 to 2,000 word Competence Statement covering the SLL Member Criteria (based upon UK Spec competencies A, B, D and E).
6. Organisation Chart (upload document).
For more information and before you write your application please read Guidance Document (December 2025).
There are two templates available to help you complete your reports.
- Respond to the competencies in the competency table - word or pdf, or
- Write a report which includes responses to all competency requirements - word or pdf.
All members of SLL must agree to the requirements of to the CIBSE Code of Professional Conduct.
Guidance Document (December 2025), including SLL member criteria and checklist.
To apply for MSLL and you are a member of SLL and/or CIBSE.
To apply for MSLL and you are not a member of CIBSE and/or SLL.
Applications are reviewed on a monthly basis. For information on dates.
NB If your aim is to apply for CEng, go to CIBSE Member Membership.
