Qualifying specialized experience for GS-15 includes all of the following: Managing all phases of federal procurements under the Federal Acquisition Regulation (FAR), including market research, development of Statement of Work (SOWs) and Performance Work Statement (PWSs), source selection, negotiations, and contract awards for complex service and supply contracts; Performing cost and price analyses and resolving audit and protest issues; Administering post-award activities, including performance surveillance and Contractor Performance Assessment Reporting System (CPARS) evaluations; Experience as a senior Contract Specialist, Team Lead, or supervisor over a contracting individual or team. However, they will have to meet the basic requirements and specialized experience requirements in order to qualify for promotion to a higher grade, unless granted a waiver under Paragraph D. D. Waiver: When filling a specific vacant position, the senior procurement executive of the selecting agency, at his or her discretion, may waive any or all of the requirements of Paragraphs A and B above if the senior procurement executive certifies that the applicant possesses significant potential for advancement to levels of greater responsibility and authority, based on demonstrated analytical and decision making capabilities, job performance, and qualifying experience.