Infrastructure Engineer/Administrator

Infrastructure Engineer/Administrator

McLean, VA Top Secret/SCI Polygraph Career Level not specified $103,800 - $218,100

Job Description

The Infrastructure Engineer / Administrator is responsible for secure operations and modernization across classified and unclassified environments. This role administers Linux and Windows systems, supports enterprise logging and compliance needs, and helps plan and execute mission system migrations into authorized government cloud platforms. The engineer collaborates closely with Network Engineering, Cybersecurity, and mission system owners to ensure high availability, strong security posture, and effective incident response-using vendor-neutral approaches that accommodate current and future enterprise services.

• Administer and maintain Linux and Windows systems across both classified and unclassified networks, ensuring secure, stable, and compliant operations
• Support onboarding of system and application logs to the authorized enterprise security logging and monitoring service by ensuring proper log generation, formatting, routing, and ingestion; collaborate with enterprise platform owners to troubleshoot data-flow issues and maintain compliance with auditing and incident-response requirements
• Responsibilities may expand to include contributing to the administration or enhancement of the enterprise SIEM platform based on government direction
• Partner with the Network Engineering Team to enable reliable delivery of logs, assist with ingestion workflows, monitor data flows, and troubleshoot aggregation and retrieval issues end-to-end
• Perform routine monitoring, patching, configuration updates, and vulnerability remediation to maintain system health, reduce risk, and ensure continuous compliance with required security controls
• Interpret vulnerability scan results, coordinate remediation activities, and document corrective actions to support ongoing risk mitigation
• Provide direct support to Authorization to Operate (ATO) efforts by maintaining system documentation, preparing compliance evidence, tracking security control implementations, and ensuring audit readiness
• Manage centralized logging/monitoring pipelines to maintain data integrity and availability; ensure instrumentation supports auditing and incident investigations
• Plan upgrades and decommissioning for end-of-life systems, ensuring proper handling of configurations and data
• Support planning and execution of cloud migrations from hybrid/on-prem environments into authorized government cloud platforms; configure cloud components including virtual networks, machine images, access controls, and resource policies
• Support cloud account provisioning by creating, configuring, and securing user accounts, roles, and permissions
• Maintain knowledge of cloud logging, auditing, and activity-tracking capabilities to support compliance monitoring, operational oversight, and incident investigations
• Provide support for data storage and relational database environments including configuration, performance tuning, integration, and backup/restore operations
• Collaborate closely with cross-functional teams-including network engineers, system owners, developers, and cybersecurity personnel-to support integration, troubleshooting, and modernization of mission systems.

Qualifications Required:

• Active TS/SCI with Poly clearance
• Bachelor's degree in computer science, IT, Engineering, or equivalent experience
• Experience administering Linux and Windows in multi-network secure environments
• Experience supporting enterprise security logging/SIEM onboarding (platform-agnostic)
• Hands-on practice with vulnerability management, patching, and configuration baselines
• Experience with cloud systems administration including virtual networks, images, identity/permissions, and compliance
• Proficiency with scripting languages such as Bash and Python, and automation tools
• Experience implementing DevOps tools such as Git and CI/CD pipelines
• Strong communication skills and ability to collaborate with technical and non-technical personnel
• Must remain on the client site during Program core hours of 0900-1500.

Desired :

• Security+ or DoD 8570 IAT Level II certification
• AWS or Azure certification
• ITIL v4 certification
• Experience supporting SIEM/log analytics onboarding and log source integration
• Experience with network services such as DNS, DHCP, and certificates
• Experience with database backup/restore and performance tuning.

- What You Can Expect: A culture of integrity. At CACI, we place character and innovation at the center of everything we do. As a valued team member, you'll be part of a high-performing group dedicated to our customer's missions and driven by a higher purpose - to ensure the safety of our nation.An environment of trust. CACI values the unique contributions that every employee brings to our company and our customers - every day. You'll have the autonomy to take the time you need through a unique flexible time off benefit and have access to robust learning resources to make your ambitions a reality.A focus on continuous growth. Together, we will advance our nation's most critical missions, build on our lengthy track record of business success, and find opportunities to break new ground - in your career and in our legacy. Pay Range : There are a host of factors that can influence final salary including, but not limited to, geographic location, Federal Government contract labor categories and contract wage rates, relevant prior work experience, specific skills and competencies, education, and certifications. Our employees value the flexibility at CACI that allows them to balance quality work and their personal lives. We offer competitive compensation, benefits and learning and development opportunities. Our broad and competitive mix of benefits options is designed to support and protect employees and their families. At CACI, you will receive comprehensive benefits such as; healthcare, wellness, financial, retirement, family support, continuing education, and time off benefits.CACI is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, pregnancy, sexual orientation, age, national origin, disability, status as a protected veteran, or any other protected characteristic.