A description of the value of systems engineering, long sought by practitioners in order to justify funding for systems engineering, must be explained in the context of clear systems engineering roles. A companion paper defines twelve systems engineering roles in detail. Value added is not a simple concept. In manufacturing terms, value added work changes the product that is delivered to the customer. This paper suggests a more robust definition of value added that applies to the systems engineering environment, including managing work, defining the problem, and reducing risk. Then, this paper explores the value of each of the twelve systems engineering roles in terms of this definition of value added and other considerations.