Geographer · Builder · Educator
Lead Principal GIS Developer at the City of Sacramento. Eighteen years building spatial systems, teaching Python and ArcGIS at SF State, and open-source GIS at UC Davis.
An immigration arc, a geographer's career, and why open source keeps showing up.
Read the story →A few spatial projects chosen for the thinking behind them, not the thumbnail count.
See the work →Python, ArcGIS Online, the ArcGIS API for Python at SF State; open-source GIS at UC Davis.
Course list →About
I came to the US from Dublin at age five, grew up in California, and have spent the rest of my life thinking about places. Two geography degrees from SF State later, that instinct turned into eighteen years of GIS practice, today as Lead Principal GIS Developer for the City of Sacramento, where the work is architecture, mentorship, and building tools other teams build on.
Alongside the day job I teach Python and ArcGIS at SF State and open-source GIS at UC Davis, and I follow AI and open-source AI with the same curiosity that pulled me toward open-source GIS twenty years ago.
Read more →Selected work
A product lab of small, focused Sacramento tools. A few are featured here; the rest are on the work page.
Teaching
San Francisco State University · Geography & Environment
Continuing & Professional Education
A hands-on tour of the open-source stack: QGIS, PostGIS, and the command-line tooling that ties them together.
Get in touch
Available for consulting, teaching collaborations, and AI / open-source projects. Drop a note and I'll get back to you.
Prefer email? daraobeirne@gmail.com