Making a Complaint against a member of CIBSE
The CIBSE Professional Practice Committee considers Disciplinary cases against CIBSE members.
How to make a complaint against a Member under the Code of Conduct
Making a Complaint about CIBSE
CIBSE aims at all times to provide excellent services to its members and to the general public. We do accept, however, that complaints may on occasion arise.
How to make a complaint about CIBSE
Engaging a CIBSE member
CIBSE members operate in a highly professional manner governed by a Code of Conduct. When engaging a CIBSE member you should make clear what the job is and listen carefully to the advice given.
More guidance here