It is difficult to determine exactly the number of jobs connected to risk management, but the fact is that the natural resources sector directly and indirectly accounts for 18% of the gross national product. That percentage might give you an idea.
Furthermore, as you pointed out, when a project is initiated, an environmental assessment is carried out. The jobs that stem from this process are in line with the risk elements. As I already mentioned, it is difficult to provide an exact figure. Perhaps someone else has a better idea of the number.