Immugio - I am not sure of the exact certifications needed but I would suggest a Forklift Safety Technician and an Electrical Safety Technician. The National Association of Safety professionals offers both and you can complete them ONLINE.
Check out our website or email me directly if I can help (brad @ NASPweb.com)
NASPweb.com
This is ONLY to be used to report flooding, spam, advertising and problematic (harassing, abusive or crude) posts.