I’m Ronald Landheer-Cieslak — Dutch immigrant to Canada, father of
three, engineering manager, developer, innovator, and apparently
someone who finds power systems automation and post-quantum
cryptography equally interesting at 11 PM. I work across DevSecOps,
cybersecurity, and protocol design, and I write about the paranoid
intersection of those fields at
applied-paranoia.com. I
designed a secure communications protocol, developed a few patents,
and somewhere along the way turned a protocol use-case illustration
into a hard science fiction thriller, The Apoptotic Cascade.
I got a little carried away.
Books & Fiction
Coming soon
Home of The Apoptotic Cascade and future novels.
Newsletter, press kit, and pre-order links.
Blog
General-purpose blog covering software development, engineering, and
whatever else is on my mind.
Cybersecurity
Practical security writing: threat modelling, defence-in-depth, and
security engineering for people who build things.
Art
Showcase of my sketches — some digital.
LinkedIn
Professional profile — work history, endorsements, and professional
updates.
Bluesky
Bluesky profiles
Academic
Publications and citations.
Newsletter
Get occasional updates about my books and writing.