The RICS or Royal Institute of Chartered Surveyors is a highly respected group founded to standardize and promote construction. It is used exclusively by those in the construction industry, particularly those in the field of quantity or building surveying.
The site can be used to assist in finding a job, to read new reports relating to construction or to promote yourself and your business. It can also provide information for upcoming events and courses that would help with the Continual Professional Development of any construction professional.
However, it does tend to send a lot of e-mails to a account regarding CPD offers, charity donations and construction related news and events. Plus it does charge for membership, unless you are a student.