agencies; and/or contracting officials and high-level technical staff of large business firms; and/or public action groups, or professional organizations; Maintains a mastery of the principles and methods to identify, analyze, specify, design, and manage functional and infrastructure requirements, including translating functional requirements into technical requirements used for logical design or presenting alternate technologies or approaches. Customer Service - Works with clients and customers (that is, any individuals who use or receive the services or products that your work unit produces, including the general public, individuals who work in the agency, other agencies, or organizations outside the Government) to assess their needs, provide information or assistance, resolve their problems, or satisfy their expectations; knows about available products and services; is committed to providing quality products and services.