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Sr. Administrative HR Specialist (CONTINGENT)

Tri Star Engineering, Inc.
United States, Virginia, Arlington
1101 Wilson Boulevard (Show on map)
Apr 28, 2026
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Job Type
Full-time
Description

We are seeking a Senior Administrative HR Specialist to join our team. The candidate shall provide US Navy Human Resource (HR) administration services to the ONR Global Personnel Office/N1 Department Head. This position shall perform administrative actions to enable the consistent and compliant transition of all ONR Global personnel (i.e., S&T and Mission Support) into and out of the Command's domestic and international office locations. The Administrative HR Specialist, Senior will accept tasking, and task prioritization, from the ONR Global Human Resource Officer/N1. This is a contingent position.

Key Responsibilities

  • Identify and track ONR Global billets/positions that will reach the "End of Tour" or mandatory rotation date, to include unscheduled ad hoc billet/position changes; and inform the ONR Global HR Department Head and ONR Global Executive Officer in writing, via email, 90 days prior to the End of Tour or Rotation Date for all impending vacancies in all ONR Global office locations.
  • Complete the administrative HR actions required to assist and ensure that employees are brought into and out of the Command with an administratively accurate, correct, and compliant personnel profile. These actions include, but are not limited to:
  • Capture personnel transition actions between selectees, supervisors, home activity personnel, HRO personnel, overseas personnel, as well and selectee sponsor and mentor and notify ONR Global HR stakeholders via email (within 24 hours of notification).
  • Complete non-inherently governmental administrative HR actions required to transition employees into and out of the Command.(Inherently governmental function means, as a matter of policy, a function that is so intimately related to the public interest as to mandate performance by Government employees.)
  • Draft and facilitate the issuance of "Welcome Aboard" letters for all selectees and assist selectees with all other required information as part of the onboarding process, depending on their status (e.g., core, detail, military, contractor, etc.).
  • Perform an annual update of all ONR Global "Welcome Aboard" packages to ensure they contain the most current information for new staff.
  • Provide off-boarding paperwork and instructions to the outgoing ONR Global personnel and their supervisor for completion at least 2 months prior to departure.
  • Collect and consolidate completed off-boarding paperwork, file, and update associated data within the N1.
  • Plan, coordinate, and facilitate the execution of Annual Working Group meetings to update and validate ONR Global's plan to recruit employees that are fully compliant with the Requirements Document (RD) for the vacant positions in the upcoming Fiscal Year.
  • Solicit annual updates from Government Program managers and make the appropriate changes to the USA Jobs template/baseline solicitation for available/opening ONR Global positions.
Requirements
  • Bachelor's Degree from an accredited college or university and 10+ years of experience in US Government Human Resource Management or have 20+ years of experience in US Government Human Resource Management.
  • Demonstrated HR proficiency in US Government personnel administration by managing customer requirements across a broad range of tasks including supporting personnel recruiting and selection, supporting the onboarding logistics of newly reported personnel, briefing preparation, conference and meeting planning and staffing (to include video-teleconference arrangements), and supporting resolution of administrative, logistical and financial HR issues.
  • Working knowledge of the Naval Research & Development Establishment (NR&DE).
  • Experience in US Navy specific Human Resource Management.
  • Must be a U.S. Citizen.
  • Able to obtain and maintain a security clearance.

About TRISTAR

TRISTAR is an SBA certified Service-Disabled Veteran-Owned professional services company supporting the U.S. Department of Defense programs. Our core competencies include Electronic Warfare, Enterprise Management, Full Spectrum Cybersecurity, Information Technology, Digital Transformation, Software Engineering and Development, Maritime Modernization and Engineering, and Technical Solutions.

TRISTAR was founded in March 1995 and has built an employee-focused collaborative environment which enables our team of professionals to create and deliver customized solutions to meet our customers' mission critical challenges. TRISTAR's core capabilities support customers with end-to-end solutions.

For over 30 years, TRISTAR has demonstrated and perfected our ability to successfully manage any task, small or large no matter how difficult or complex.

TRISTAR is proud to serve the Department of Defense and other Federal Agencies.

TRISTAR provides equal employment opportunities to all employees and applicants for employment and prohibits discrimination and harassment of any type without regard to race, color, religion, age, sex, national origin, disability status, genetics, protected veteran status, sexual orientation, gender identity or expression, or any other characteristic protected by federal, state or local laws. This policy applies to all terms and conditions of employment, including recruiting, hiring, placement, promotion, termination, layoff, recall, transfer, leaves of absence, compensation and training.

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