Certifications: From ISO to WHG.

On this page, you will find ONI’s certificates presented in a concise and transparent format—from ISO to WHG. All relevant certificates are clearly listed and available for download as PDF files, including ISO 9001, ISO 14001, ISO 45001, and ISO 50001, as well as other certifications such as operational certification, hygiene specialist certification, welding certificates (EN 1090-1/-2), and WHG. 

This gives you a quick and reliable overview of the verified standards and qualifications that ONI meets in quality, environment, occupational safety, energy, and technology.