Having more than 25 years experience both in the US and Europe, and having sat on an ANSI TCC (one member sits on the ISO Board for safety stds); I would suggest you consider a university degree program. OH&S IV is too basic to be meaningful. Moving towards safety engineering, occupational medicine, and environmental management is where the future is going. bear in mind, I recently too a degree in Business Mgt to prepare myself for a Corp. Safety Role as they won't look at just a safety person speaking tech talk... you have to able to the COO too. If I had to do it all over again, I probably would have went to Harvard's PON school for negotiators. (You can find me on LinkedIn and VisualCV.)