This position is in the Office of the Secretary, (OST) Office of Security, Personnel Security. The incumbent is responsible for various personnel security duties with an emphasis on the adjudication of background investigations. Applies practical knowledge of commonly applied security principles, concepts and methodologies and apply judgement to processing applications for investigations. The Personnel Security Specialist: Analyzes the accuracy and completeness of investigative forms and documentation against Federal Personnel Vetting standards to ensure alignment with position designation requirements and regulatory frameworks. Performs comprehensive, independent reviews of investigative reports by applying the "whole person" concept to evaluate security concerns and determine an individual's eligibility for access to sensitive information and critical resources. Interprets and apply rigorous adjudicative policies and protocols to resolve complex personnel security and suitability investigations, identifying mitigating factors to ensure substantiated, evidence-based determinations. Serves as a subject matter expert by providing precise, policy-driven guidance to DOT operating officials and external stakeholders regarding security vulnerabilities, vetting criteria, and organizational risk mitigation. Exercises discretionary authority to grant or deny national security eligibility and clearances, ensuring all determinations are grounded in a diligent and consistent application of federal vetting policy. The ideal candidate effectively manages complex personnel security adjudications by applying federal vetting standards to reach accurate, well-supported eligibility decisions. They must also serve as a reliable advisor who can clearly communicate policy requirements and security guidance to internal and external partners. CONDITIONS OF EMPLOYMENT: As a condition of employment for accepting this position, you will be required to serve a 1-year probationary period during which we will evaluate your fitness and whether your continued employment advances the public interest. In determining if your employment advances the public interest, we may consider: your performance and conduct; the needs and interests of the agency; whether your continued employment would advance the organizational goals of the agency or the Government; and whether your continued employment would advance the efficiency of the Federal service. Upon completion of your probationary period, your employment will be terminated unless you receive certification, in writing, that your continued employment advances the public interest. SELECTIVE SERVICE: Males born after 12/31/1959 must be registered for the Selective Service. GOVERNMENT TRAVEL CARD: This position involves travel. A government contractor-issued travel card will be issued and must be retained for official business only. BACKGROUND INVESTIGATION: A background security investigation is required for all selected individuals. Appointment will be subject to the applicant's successful completion of the security investigation and favorable adjudication. Failure to meet these requirements will be grounds for termination. PROBATIONARY PERIOD: You must complete a one-year probationary period (unless already completed). TIME-IN-GRADE: Federal applicants must have served 52 weeks at the next lower grade in the competitive or excepted service in the executive branch to satisfy time-in-grade restrictions contained in 5 CFR 300, Subpart F. DEU REQUIREMENTS: Applicants selected under delegated examining procedures may be required to successfully complete a one-year probationary period (unless already completed). DRUG TESTING: This position requires a pre-employment drug test and is subject to random drug testing through the duration of appointment. TOP SECRET CLEARANCE: The incumbent must possess a top-secret clearance.

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