Hi @Lievaz,
To do this, you will first have to create a new goal for the new employees and you can link this to the existing Organizational goal. Go to Performance & Development > Goals > Create new goal. Set the details and click Next.
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In step 2, click Combine centralized and individual tracking and Select the existing organizational goal from the dropdown menu.
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In the next step, you will choose the new employees who will be part of the Organizational goal.
For further information, please see our Help Center article:
Thanks for your query and let me know if you have further questions. 
Best,
Steve
Thank you Steve, i managed to do this.
Thank you for your support!