IEC 62443 is an international standard for industrial cybersecurity. It provides guidelines and requirements to protect industrial automation and control systems (IACS) from cyber threats. The standard covers everything from system architecture and risk assessment to secure development and operations, making it essential for ensuring safe and resilient Industry 4.0 environments. We collaborate closely with oil operators to ensure the highest level of secure communication, and our solutions are in use at several offshore installations on the Norwegian continental shelf.