Dan Fisher / Field Notes
Making operational technology easier to understand.
I’m Dan. I use examples, reference tools, and writing to connect systems and security to the physical services they support. Choose something to try, something to look up, or something to read.
Try an example · find a resource · read an explanation
01
Examples
Try browser simulations and worked scenarios. See what changes, what fails, and what the evidence can establish.
Open section ->02
Resources
Look up ICS techniques, compare reference releases, and take away worksheets, activities, and trusted reading.
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Writing
Read the explanations: OT foundations, systems and dependencies, security decisions, and governance.
Open section ->Featured resource
Understand the behavior behind the matrix.
The ICS Technique Explorer brings MITRE ATT&CK® for ICS into one reference: platform views, controller-level asset relationships, and release comparisons. It keeps source data separate from practical interpretation—not a score for an installed system.
Open the ICS reference