The Individual is employed by a DOE contractor and has held an access authorization for several years. DOE Exhibit (Ex.) 6 at 1. Pursuant to an investigation, it was discovered that the Individual, for a second period of time, had not filed state or federal tax returns. Ex. 4 at 1-2. This discovery prompted the Local Security Office (LSO) to conduct a Personnel Security Interview (PSI) with the Individual in October 2011. Ex. 5. After conducting the October 2011 PSI with the Individual, the LSO informed the Individual in a November 2011 notification letter (Notification Letter) that derogatory information existed that raised security concerns under 10 C.F.R. § 710.8(l) (Criterion L) and that his security clearance was suspended. See Ex. 1. The Notification Letter also informed the Individual that he was entitled to a hearing before a Hearing Officer in order to resolve the security concerns.