The Australian Signals Directorate’s Australian Cyber Security Centre (ASD’s ACSC) has just published “Principles of Operational Technology Cybersecurity.” This is actually a global effort, with ASD’s ACSC collaborating with all of the following organizations on this OT security guide:
The “Principles of Operational Technology Cybersecurity” guide centers around 6 key principles:
The objective for this guide is for each of the 6 principles to be considered when any OT decision is made. It’s sort of an evaluation checklist to ensure decisions around the design, implementation or management of OT won’t negatively impact the cybersecurity and safety of the operations. This is not technical document outlining specific security capabilities, but may be valuable for organizations looking to establish establish alignment, communication and governance across various teams and levels throughout the organizations.
You can access the full guide for free here: https://www.cyber.gov.au/about-us/view-all-content/publications/principles-operational-technology-cyber-security
CISA also lists it in their resources here: https://www.cisa.gov/resources-tools/resources/principles-operational-technology-cyber-security