Change Farm Admin Service Account to brand new Service Account (SharePoint 2013)

Dear SharePoint Administrator Community,

We have On-Premise SharePoint 2013 Farm (Prod & Dev). The current Farm Admin account needs to be replaced with brand new Farm Admin Service Account for Security reasons.

The SharePoint 2013 Environment has Nintex Workflows and Nintex Forms in usage additionally.

Kindly advise the procedure which will ensure smooth transition to new Farm Admin Account.

Thank You,

Arun