As noted by the U.S. Supreme Court in Department of Navy v. Egan, "no one has a ‘right’ to a security clearance." Department of the Navy v. Egan, 484 U.S. 518 (1988). Nevertheless, the Executive Branch of the Federal government must follow minimum due process requirements in determining whether or not it is clearly consistent with interests of national security to grant or deny a security clearance applicant access to classified information. In order to be found eligible for a Personnel Security Clearance (PCL), you must show that you are able and willing to safeguard national security information, based on your loyalty, character, trustworthiness and reliability.
Executive Order (E.O.) 12968 lays out the minimum due process requirements for Federal employees. Specifically, E.O. 12968 provides applicants and employees whose security clearance is denied or revoked with: (1) a comprehensive and detailed written explanation of the basis for that conclusion; (2) any documents, records, and reports upon which a denial or revocation is based; (3) the right to be represented by counsel; (4) a reasonable opportunity to reply in writing to, and to request a review of, the determination; (5) written notice of and reasons for the results of the review; and (6) an opportunity to appear personally and to present relevant documents, materials, and information at some point in the process before an adjudicative or other authority, other than the investigating entity, as determined by the agency head.
Executive Order 10865 governs the adjudications, due process hearings, and appeals of security clearance cases for private sector employees, i.e., Federal contractors. Specifically, DoD Directive 5220.6 provides a federal contractor whose security clearance is proposed to be denied or revoked with: (1) notice of the specific reasons for the proposed action; (2) an opportunity to respond to the reasons; (3) the right to a hearing, including the opportunity to cross-examine persons providing adverse information; and (4) the right to be represented by counsel.