Any IT role or function can be moved from internal to external staff. The only role that ultimately can never be moved to an external team is the top level of vendor management. At some point, someone internal to the business in question must oversee the relationship with at least one vendor (or else there must be a full internal IT staff fulfilling all roles.) In many modern companies it may make sense for a single internal person to the company, often a highly trusted senior manager, be assigned to oversee vendor relationships but allow a vendor or a group of vendors to actually handle all aspects of IT. Some vendors specialize in vendor relationship management and may bring experience with and quality management of other vendors with them as part of their skill set. Often these are MSPs or IT Outsources who are bringing IT Management as part of their core skill set. This can be a very valuable component as often these vendors work with other vendors a great deal and have a better understanding of performance expectations, cost expectations and leverage more scale and reputation than the end customer will.