Jean-Luc Martel builds and runs technology for regulated financial institutions, where a system has to survive audit, change control and a bad day. His posts on Escalation Zone start from that bad day: the moment the WAN drops, GPS disappears, the backups turn out to be encrypted too, or the other agency’s systems cannot take what you need to send.
He writes about the layers that decide the outcome before anyone convenes a crisis cell. Identity and inventory, because you cannot defend what you cannot name. DNS and time, because everything else quietly depends on them. Recovery objectives, degraded modes and minimum viable command, because “up or down” is rarely the question that matters once something has gone wrong.