IT Staffing is probably the second or third largest expense in most mid to large size companies (#1 being cost of their internal IT employees). First know the difference... the process for hiring 'contract/temporary' staff versus hiring 'permanent/employee' staff is very different. Know that a typical vendor will not be an expert at both. Ideally, you want to have 2 separate pools of vendors - one for contract/temporary hiring and one for permanent/employee hir [...]