I'm not aware of any open source code that will do this. You would need to write your own. Both services have a REST API, so it's not that hard. There are also Apps that you can install in Jira to do this.
ServiceNow Connector for Jira
Perspectium Replicator for Jira
Tasktop Integration Hub
You'll have to read over the docs to see if they can do what you need them to do, though.
It looks like you're new here. Sign in or register to get started.
![Photo of Dave Theodore [Coyote Creek Consulting]](https://us.v-cdn.net/6038660/uploads/avatars/be/ad/nbead3954437e7065e4d119624fd7f5e3.png)