1. WP All Import plugin

From version 2.7.0, you can import job postings included in an XML/CVS file easily as we coded add-on that allows you to implement this task. Besides, all functions of this plugin are kept unchanged.After this plugin is activated, you will see a new section in Admin panel. Its name is All Import

Please refer to this link to learn more about this plugin:
WP All Import Documentation

2. Noo Jobs Import Plugin

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This plugin helps you to import jobs from WP Job Manager and from Indeed.com.
To install the plugin, go to Plugins > Add New> Upload plugin > choose file> upload Noo-jobs-import.zip file (it is located in Add-ons file) > Click Install Now> click Activate the plugin to complete.
No sooner have you installed this plugin than it will be shown in Admin panel> Noo Jobs Import.
Import Jobs from WP Job Manager• Click Choose file to upload XML file
• Job Author: You can choose one author to import jobs or Automatically create New Authors based on the data from the old site
• Author Password: Create a New password for New authors hereClick Submit to complete.
Import Jobs from Indeed.com
There are many options here you will need to complete:
Publisher ID: To import jobs from Indeed, you will need a Publisher ID
Keyword: The keyword to search indeed jobs
Job location: A location to search for jobs from Indeed
Job type: Opt a job type in the drop-down list
Jobs author: Select an author in the drop-down list
Job category: Choose a job category to import jobs
Start job index: it will start importing Indeed jobs with the job of which sequential number is n in the list of Indeed job. For example, there are 100 jobs in the list of Indeed job and you set Start job index to be 60 then it will start to import the job whose sequential number is 60
User-agent: This is a default option. Leave it if you are not sure what it means
IP: This is a default option. Leave it if you are not sure what it means