Hi, I’m Aaron. I’m a Florida native and currently work for the state’s Department of Environmental Protection, providing enterprise GIS support to its many program areas. I try to learn something with every project I do—whether that’s taking up a new skill, experimenting with new designs, or just doing lots of background reading.

I’ve been working professionally in Geographic Information Systems since 2016 and dabbling with my own maps since middle school—with smudgy, pencil-doodles of Middle Earth. When not making maps, you can find me pursuing other creative outlets, like woodworking, printmaking, photography, or stained glass. Kayaks are my transportation of choice, and I have a dog named Wedge, who is the best co-pup in the galaxy.


  • Florida Dept of Environmental Protection (2016—)
  • GTM National Estuarine Research Reserve (2016)
  • Unmappy things, like sweeping tennis courts and installing fire alarms (—2016)


  • B.S. Environmental Science – Florida State University (2013)
  • Graduate Certification in GIS – University of West Florida (2015)


  • Cartography
  • GIS Analysis
  • Python (Data processing and workflow automation)
  • Assorted software
    • ArcGIS (Pro | Online | Survey123/Field Maps | Drone2Map)
    • Adobe Suite (Illustrator | InDesign | Photoshop | Lightroom)
    • QGIS, Blender, GIMP
    • Microsoft Excel
  • Drones (DJI Phantom 3 Adv.)
  • Measuring twice and cutting once
  • Setting off fire alarms, constructively
  • Turning dials on a DSLR



  • 2019 ESRI SEUC — Take Action Today: Hurricane Response & ArcGIS Online
  • 2022 NACIS Conference — Design as Defined by Atlas of Design Contributors
  • 2023 ESRI SEUC & SHRUGinar — Animating Harmful Algal Blooms Using Multidimensional Rasters

Aaron Koelker
Please contact me if you\'d like to use or feature my work, I\'d be happy to share it.