I work in this industry and often pick up some of the roles that you are looking to provide. On other projects, other organisations or individuals can be responsible for this role and in all circumstances, the role of CDM coordinator can play a significant part.
Although the name does need to convey an air of professionalism, I find that the company name can be slightly more generic and a tag-line below giving a brief description of the role?
CHL Technical
CDM Co-ordination Services
Also, if your surveying arm is a side role, don’t let that interfere with your main function. If you list this as a service on the main page of your website and have at least a one page overview, Google will do the rest.