Select Jobs from the main menu in the Volunteer Reporter.
In Jobs, click the Edit button.
Highlight the old Job name and type a new Job name.
While still in Edit mode [or click the Edit button], click to open the Station list. Select the station to which you would like the job, volunteers and hours to transfer. Click OK to save it.
This moves all the volunteers/placements/hours for that job to the new station. Afterwards, you might have an 'orphan' station to remove. You can delete a station only after there are no jobs, placements or hours attached to it.