Hi,
You can use two plugin:
https://wordpress.org/plugins/wp-all-import/
https://wordpress.org/plugins/wp-all-export/
You can try following these steps:
eg: Import Job to Jobmonster Site.
- You create a job with the Jobmonster site.
- You export it => You will have a sample file to import
- You export all job from current your site.
- Edit the file similar to the sample file you exported from the Jobmonster site.
- Import the file to Jobmonster site.
I think you will need someone who understands WordPress to be able to do this job.
Best regards,
tb.