Your city doesn't have taste of science? That's too bad! Still, its easy to fix...
You can start small for the festival, with just a handful of events. You have plenty of time to plan and organise. And you have an experienced central team to help you every step of the way.
To make a team, there are a few different roles to think about:
Manager — pulls the operation together
Publicity — for promotion: Facebook, Twitter, local Media...
Website — posting the events on the website
Sponsor — some local businesses are happy to help financially
Then you can think about possible venues — you might find some people to be Venue Scouts.
Speakers are quite important... so a Speaker Liaison is good to keep the talent happy! Do you have universities or research institutions in town?
For the actual events, its good to have some more helpers: Event Managers.
You don't need this many people to start with, but if you can spread the work around it's easier.