Migrate job listings from other plugins?

At present we don’t provide that capability.

However, you might take a look at: https://www.ads-software.com/plugins/wp-all-import/

We don’t have the time however, if your handy with code they say you can build an add on structure that would allow for interface with JM.. since our data is stored in arrays it’s bit more difficult to manage imports at this time.

If this something you felt like taking on, I could supply you with the JM specifics and provide you credit on JM for doing this. The plugin is free and my understanding is the add-on would be too.