Security Basics: Security Auditing ?

["ॐ aditya mukadam ॐ" <aditya.mukadam () gmail com>]

Hello !

First of all, thanks everyone for sharing knowledge ! Also, sorry for
a very broad question below.

As per industry standards/job market :-) ,  Security Auditor should
have which certifications ? or , which certifications are recommended
to be a Security Auditor ?

 I understand that certification is not everything however the
relevant experience is also needed.Which are the recommended areas in
which a Security Auditor should have experience in ? Network
Security,Pen test etc ?

Thanks,
Aditya Govind Mukadam