About

I am David Marcantonio, an IT leader based in San Francisco with 30+ years of experience building and running technology organizations. Most of my career has been spent inside Bay Area tech companies, some of which you have probably used, keeping the lights on and the people productive.

My day job is IT Operations: identity and access management, endpoint infrastructure, ITSM, SaaS administration, security posture, office buildouts, and the unglamorous but necessary work of keeping organizations running at scale. I have built IT functions from scratch, transitioned teams off outsourced models, and led distributed teams across multiple time zones.

Outside of work I run a self-hosted homelab that gets more elaborate by the week. It includes OPNsense, UniFi, Plex, a full arr stack, Homebridge, ESXi, and enough VLANs to keep things interesting. It is where I experiment with things I would never get to touch in a corporate environment, and where most of what ends up on this blog gets its first run.

This site is where I document what I am building, what I am learning, and what I think is worth sharing: homelab deep dives, AI tooling discoveries, career observations, or just things I found interesting enough to write down. No particular cadence, no particular audience. Just notes from someone who has been in IT long enough to have seen every trend come around twice.

If something here is useful to you,LinkedIn is the right place to connect.