Posted By Mal Hi Graham, subject of great debate this and varying subjective viewpoints. If you look at the ACOP and appendix 5 there are three areas that are considered important. It asks for knowledge and experience in: design and construction process; health and safety in construction; relevant experience to task; So these are the three areas you need to concentrate on Graham, have a look at them and then see where your gaps are, bridge those gaps with training, reading, mentoring, shadowing, whatever it takes, then you will be in a position to say to clients and employers, look i have the knowledge and experience in the three identified areas, employ me! For me, if you have a background i construction, whatever that discipline may be, that is a great start. And out of the three areas identiifed above hte most important is the relevant experience to the task, eg; most areas of construction i deem myself to be more than competent to perform the CDMC function. However move into petrochem, or nuclear, or chemical factory etc and i have no experience in those areas and would not accept an appointment in those fields as CDMC. Best of luck Graham, Regards, Mal