No Sir if any of parent is direct recruit to Group A the children shall not get any benefit of OBC NCL.
For salaried government employees his position and income from other sources is only important to ascertain the criteria.
since in your case your Group A direct recruit no benefit.
Kindly refer to page 14 of the notification
http://www.ncbc.nic.in/Writereaddata/Supplementary%20Creamy%20Layer%20Report%20241115%20final%20at%20430PM%20Corrected%20by%[deleted]%20page%20no[deleted].pdf