Mr. Somnath,
Let me clarify for you...
Management has all authority to change your job description. Management can recruit new employees and can shift some of your work to them. If you are not comfortable with this, you can directly discuss the issue with management. But before doing so, consider the following:
1. Check if your recruitment responsibilities have been fully transferred to the new COO.
2. Check if management intends to add new tasks or activities to your job description by relieving you of the current recruitment process.
If the recruitment responsibilities still lie with you and the COO is deliberately overlooking you, then you should decide whether to address this issue with management.
In many organizations, HR processes are divided among teams. In my opinion, do not lose heart; wait until the situation shifts in your favor, and then make your move.
Thank you so much, Mr. Arun J., for your insights. I want to mention that I have developed a strong trust and respect from my management. I do not doubt my management in any way. It was their fair judgment to support me by providing an additional administrative hand as the COO.
Regards,