Go back to directory. Add to Address Book. Brett Doney CEO Great Falls Montana Development Authority Contact: Brett Doney Address Suite 203 405 – 3rd Street NW Great Falls MT 59404 USAwork Phone: 406-750-2119work Email: bdoney@growgreatfalls.orgINTERNET Website: www.growgreatfallsmontana.org Categories: 2023 Updated 5 months ago.