Hi @lalajee ,
This is a good approach to improve security state of your active directory.
Regarding AD objects, you can based on structure organizational Unit set delegations to give permission to a user or security group to manage objects under a specific organizational unit.
For your case you can create two security group : one for Senior and one for tech.
Senior group will have full control on all objects in the OU and tech group will have control only on computer objects as mentioned in the article below:
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