Mofa attestation on offer letter

Frds,

I wish to bring my family here in Saudi Arabia, & I'm working as IT network engineer. Due to my Iqama profession  (Labor) I was unable to bring my family. But I'm qualified IT engineer & I was completed B-Tech from India. My company ready for changing Iqama profession & ready to give offer letter with Chamber of Commerce (COC). But now a days Saudi Embassy in India need COC with MOFA( Ministry of Foreign Affair)

How Can i get this MOFA attestation from Saudi?
Is that really Required for Certificate attestation?
Before changing Iqama profession did they(mofa) allow to stamp on my offer letter?

Friends pls share your experience for the same...& help me to get rid of from this paper work formalities ....