Senior Systems HBSS​/MDE Administrator

Company Overview

At Valida Tek, we modernize and optimize IT services to solve some of the most critical challenges facing federal civilian and defense agencies. From customers to partners to top-talent employees, Valida Tek puts people first, empowering them to exceed expectations and transform government organizations. Our success starts and ends with our people, so we built a company where great people can do great things, with the resources and autonomy to make decisions that transform organizations.

We operate as one team of diverse people, united by a passion for continuous growth and optimization. Our commitment to quality and performance optimization is the reason why our IT Service Projects and New Development Projects have been appraised at CMMI Maturity Level 5, positioning us as one of a handful of elite companies to receive the highest form of third-party validation.

We are seeking a skilled Senior HBSS Administrator in Fort Belvoir, VA to join the I3TS team supporting DTRA. The I3TS program provides enterprise-wide IT support to enable DTRA’s Information Management & Technology Directorate (ITD) to consolidate, modernize, and continuously innovate the delivery of IT services and mission capabilities to DTRA’s internal and external mission partners operating in CONUS and OCONUS locations.

The candidate will be responsible for ensuring the security and integrity of IT systems by running their Endpoint Security with experience in Trellix and Microsoft Defender. Administrator will also be responsible in applying Security Technical Implementation Guides (STIGs), managing system patches, and overseeing vulnerability management processes. This role supports federal clients in maintaining compliance with the Department of Defense (DoD) and other federal cybersecurity standards.

The ideal candidate will be responsible for identifying points of vulnerability, non‑compliance with established Information Assurance (IA) guidelines and regulations and recommend mitigation strategies, along with assisting users as needed in a classified computing environment. The selected candidate must be able to work independently as well as with a team of IT analysts, administrators, and engineers. The position requires excellent communications skills, both verbal and written.

The candidate must be able to work in a high‑energy environment and adapt to shifting priorities.

This role will provide continuous upkeep, monitoring, analysis, and response to Information System, network and security events using Endpoint Security tools such as Trellix and Microsoft Defender.
STIG Application and Compliance: Implement and maintain Security Technical Implementation Guides (STIGs) on Endpoint Security Tools. Conduct regular STIG compliance checks using tools like SCAP Compliance Checker and STIG Viewer. Document STIG configurations and remediation actions to ensure audit readiness.
Patching and System Updates: Manage and deploy operating systems and application patches in accordance with federal patch management policies. Coordinate patch schedules to minimize operational impact while meeting compliance deadlines. Verify patch deployment success and troubleshoot any issues arising from updates.
System Hardening: Harden systems by applying best practices and federal security guidelines to reduce attack surfaces. Maintain configuration baselines and ensure systems adhere to DoD and NIST standards.
Incident Response Support: Participates in internal/external security audits/inspections; performs risk assessments and Continuous Monitoring. Assist in identifying and responding to security incidents related to vulnerabilities or misconfigurations. Document incidents and contribute to after‑action reports for continuous improvement.
Collaboration and Reporting: Work closely with system administrators, engineering staff, and compliance teams to ensure cohesive security operations. Prepare detailed reports and briefings for federal clients on STIG compliance, patching status, and vulnerability management efforts. Develop, implement and enforce Information Security Policies and Procedures.
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