Senior Systems Administrator

We are seeking an experienced Senior Systems Administrator to lead Independent Verification and Validation (IV&V) efforts for network systems infrastructure projects. This is a 6-month contract position based 100% onsite in Herndon, Virginia. In this critical role, you will ensure that all network systems meet rigorous operational, security, and performance standards, collaborating closely with engineering, operations, and project management teams to verify that all deliverables align with project requirements and industry best practices.

Responsibilities

• Lead the planning, coordination, and execution of IV&V activities for network infrastructure projects.
• Develop and maintain IV&V processes, checklists, and documentation to ensure comprehensive coverage and traceability.
• Review system architectures, configurations, and deployments to verify compliance with requirements and standards.
• Conduct detailed assessments, audits, and testing of network components including routers, switches, firewalls, and related infrastructure to validate functionality, security, and performance.
• Perform vulnerability assessments, validate Nessus findings, and remediate security vulnerabilities with hands-on technical expertise.
• Independently assess technical implementations, validate evidence, and advise engineering teams on security risks and corrective actions.
• Identify gaps, risks, and non-conformities, and provide actionable recommendations for remediation.
• Prepare and present clear, comprehensive IV&V reports to stakeholders, highlighting findings, risks, and suggested improvements.
• Collaborate with cross-functional teams to ensure timely resolution of identified issues.
• Stay current with emerging technologies, industry standards, and best practices in network infrastructure and IV&V.
• Mentor junior staff and contribute to a culture of continuous improvement.

Qualifications

• Required

• Bachelor's degree in Computer Science, Information Technology, or a related field.

• 7+ years of experience as a Systems Administrator, Network Systems Engineer, or similar role.

• At least 2 years in a lead or IV&V-focused capacity.

• Deep understanding of network infrastructure components including routers, switches, servers, firewalls, VPNs, and wireless systems.

• Proven hands-on experience conducting vulnerability assessments and validating security findings using tools such as Nessus.

• Proven experience conducting IV&V, audits, or independent assessments of IT systems.

• Strong knowledge of security frameworks and compliance requirements such as NIST, ISO, and CIS.

• Support for NIST RMF compliance.

• Proficiency with network monitoring, analysis, and automation tools.

• Excellent analytical, problem-solving, and communication skills.

• Ability to manage multiple priorities and meet deadlines in a fast-paced environment.

• Preferred

• Advanced degree in Computer Science, Information Technology, or a related field.

• Relevant certifications such as CISSP, CRISC, or CSQA.