A managed security service that does nothing but handle security issues all day long has a much higher level of security situational awareness than an overtasked administrator with multiple responsibilities. Companies who can afford to maintain specialized security teams probably don’t need to oursource these functions. A quick way to determine if a company probably doesn’t needs to outsource security tasks is to check to see if they are members of FIRST.org.com. A quick check-out is a good sign that FIRST.com has been updated.com.”]
Source: https://taosecurity.blogspot.com/2004/12/pros-and-cons-of-outsourcing-security.html

