If you have some industry specific experience then it will help. The friday course in UCD is the 'entry level' qualification but combined with some practical experience in some field it might just about be enough for basic safety officer roles. The two year diplomas are a much better qualification but are much more of a committment. Becoming a safety officer or similar is not just a matter of doing a course and hey presto. Legislation requires you to be a competent person in order to advise on health and safety, i.e. you must have skills, knowledge, experience and qulaifications. Most employees look for a combination of academic qualifications and some practical experience.