Administrative Assistant, Entry Level (GT26101641)

Gtsc; Chantilly (VA); On-site; USD 42,000 - 56,000; Full time

Benefits offered by this job

PTO 15 days

Federal holidays 11

Health insurance

Dental insurance

Vision insurance

Life insurance

Disability insurance

HSA

FSA

Travel assistance

Pet insurance

Job summary

GTSC seeks an Administrative Assistant for its Chantilly, Virginia headquarters HR office. The HR Assistant provides administrative and operational support across the Human Resources department, serving as a flexible resource for day-to-day activities, employee communications, benefits administration, onboarding, and HR systems.

The role involves coordinating documentation, maintaining records, assisting with training and compliance, and supporting multiple HR projects.

Qualifications

• HS diploma or GED required.
• 1–2 years administrative assistant experience.
• Strong organizational skills with multiple deadlines.
• Proficient with Microsoft Office applications including Outlook, Word, Excel, PowerPoint, and Teams.
• Strong written and verbal communication; accurate and timely work.
• Ability to handle confidential information with discretion.
• Able to interact with employees, managers, vendors, and stakeholders.
• Capable of independent work and collaborative HR teamwork.

Responsibilities

• Provide day-to-day administrative support to HR team.
• Monitor HR inboxes and route inquiries to the right team member.
• Assist onboarding and offboarding activities and communications.
• Process routine HR transactions and data changes in HR systems.
• Assist with employment verifications and routine documentation requests.
• Support I-9 verification and E-Verify processing and records.
• Prepare HR correspondence and communications using templates.
• Maintain electronic personnel records and HR documentation.
• Support benefits invoice reconciliation and eligibility checks.
• Track training, performance reviews, and HR processes.
• Maintain HR trackers, calendars, and reports.
• Assist with HR audits and records maintenance.
• Contribute to HR announcements, presentations, and resources.
• Support HR projects by gathering information and coordinating with stakeholders.
• Maintain confidentiality of employee and company information.

Skills

Organizational skills

Microsoft Office proficiency

Written & verbal communication

Confidentiality & discretion

Stakeholder communication

Independent work with collaboration

Education

High school diploma or GED

Tools

Microsoft Outlook

Microsoft Word

Microsoft Excel

Microsoft PowerPoint

Microsoft Teams

Job description

GTSC seeks an Administrative Assistant for its Chantilly, Virginia headquarters Human Resources (HR) office.

The HR Assistant provides administrative and operational support across the Human Resources department. This position is designed to serve as a flexible resource to the HR team, assisting with day‑to‑day HR activities, employee communications, benefits administration, onboarding and offboarding, HR systems and records, compliance tracking, training coordination, and other departmental initiatives.

The HR Assistant will work closely with members of the HR team and will be exposed to multiple areas of Human Resources. Responsibilities may shift based on departmental priorities, making this position well suited for someone who is organized, adaptable, eager to learn, and comfortable supporting multiple projects and stakeholders at the same time.

Required Skills and Experience:

1. A high school diploma or GED.
2. 1–2 years administrative assistant experience, responsible for a diverse set of daily recurring tasks.
3. Strong organizational skills with the ability to manage multiple assignments, deadlines, and follow‑up items.
4. Proficiency with Microsoft Office, including Outlook, Word, Excel, PowerPoint, and Teams.
5. Strong written and verbal communication skills with commitment to accuracy and timeliness.
6. Ability to handle confidential and sensitive information with discretion and professionalism.
7. Comfortable communicating with employees, managers, vendors, and other internal and external stakeholders.
8. Ability to work independently on assigned tasks while also functioning effectively as part of a collaborative HR team.

Responsibilities:

1. Provide day‑to‑day administrative and operational support to members of the Human Resources department.
2. Monitor HR inboxes and respond to routine employee inquiries or route questions to the appropriate HR team member.
3. Assist with employee onboarding and offboarding activities, including coordinating required documentation, systems activities, and communications.
4. Process routine employee transactions and data changes within HR systems, including new hires, terminations, status changes, promotions, and other personnel updates.
5. Assist with employment verifications and other routine employee documentation requests.
6. Assist with I‑9 verification and E‑Verify processing and maintain associated records.
7. Prepare routine HR correspondence, forms, letters, and employee communications using established templates and guidance.
8. Assist with maintaining accurate electronic personnel records and filing HR documentation in appropriate systems and repositories.
9. Support benefits invoice reconciliation by reviewing employee eligibility and coverage information and assisting with the identification and resolution of discrepancies.
10. Track completion of required corporate, compliance, and employee training.
11. Assist with tracking performance review activities and other recurring HR processes.
12. Maintain HR trackers, spreadsheets, reports, calendars, and other tools used to monitor departmental activities and deadlines.
13. Assist with HR compliance audits, document reviews, and records maintenance under the direction of HR staff.
14. Support preparation and distribution of HR announcements, presentations, newsletters, employee resources, and other internal communications.
15. Assist with HR projects and initiatives by gathering information, organizing materials, tracking action items, scheduling activities, and following up with stakeholders.
16. Maintain strict confidentiality of employee, company, and proprietary information.
17. Perform other duties as assigned.

Physical Requirements:

1. Ability to commute and work in‑office daily.
2. Prolonged periods sitting at a desk and working on a computer.
3. Occasionally required to lift files, open filing cabinets, and bend or stand as necessary.
4. Must be able to communicate effectively in both in‑person and virtual work environments.
5. Ability to manage repetitive tasks and maintain focus in a fast‑paced, deadline‑driven environment.

Benefits

• 15 days of PTO.
• 11 paid federal holidays.
• Medical, Dental, Vision, Life, and Disability insurances.
• HSA and FSA.
• Travel assistance program.
• Pet insurance.
• and many others.

GTSC is proud to be an equal opportunity employer, committed to recruiting, hiring, and promoting qualified people of all backgrounds, regardless of sex; race; color; creed; national origin; religion; age; marital status; pregnancy; physical, mental or sensory disability; sexual orientation; gender identity or any other basis protected by federal, state or local law.

Learn more about your EEO rights as an applicant

GTSC is committed to working with and providing reasonable accommodation to applicants with physical and mental disabilities. If you have a disability and require assistance with our online application process, please tell us how we can help by contacting us at [e-mail] Note: This accessibility is intended for individuals requiring accommodations and should not be used to check on the status of your application. Inquiries not specific to requesting accommodation will be discarded.

GTSC participates in the E‑Verify program in certain locations as required by law. Learn more about the E‑Verify program.

Employment in this position is contingent upon the successful completion of a background check. Depending on the nature of the job duties or requirements set forth by our government clients, additional screenings such as drug testing and/or credit checks may be required. These checks are conducted in accordance with all applicable federal, state, and local laws.