Entry-Level HR Administrative Assistant | Onboarding & Admin Support

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 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.