Senior Systems Engineer

Core One•Sterling, VA

9d•$125,000 - $165,000•Onsite

About The Position

Join our team at Core One! Our mission is to be at the forefront of devising analytical, operational and technical solutions to our Nation's most complex national security challenges. In order to achieve our mission, Core One values people first! We are committed to recruiting, nurturing, and retaining top talent! We offer a competitive total compensation package that sets us apart from our competition. Core One is a team-oriented, dynamic, and growing company that values exceptional performance!

Requirements

Bachelor’s degree in Computer Science, Information Systems, or a related technical field OR 5+ additional years relevant experience in lieu of education.
5+ years of relevant systems and network engineering experience.
Hands-on experience configuring and troubleshooting enterprise routing, switching, and firewall platforms.
Experience administering Windows and Linux server environments and virtualization platforms.
Working knowledge of cloud networking and hybrid connectivity in AWS or Azure.
Proficiency with scripting and shell environments for automation and administration.

Nice To Haves

Certifications such as CCNA, CCNP, Security+, or AWS Solutions Architect – Associate.
Experience with air-gapped, isolated, or closed network environments in secure settings.
Experience supporting secure communications and VTC infrastructure.
Familiarity with infrastructure-as-code and configuration management practices.
Experience supporting multi-site or distributed infrastructure.

Responsibilities

Build, secure, and sustain the network and systems infrastructure that supports program and customer operations across on-premises, cloud, and hybrid environments.
Configure, maintain, and troubleshoot enterprise network infrastructure including routers, switches, firewalls, and VPN connectivity.
Support the design and implementation of LAN, WAN, and remote site network solutions that meet operational and security requirements.
Analyze network performance data, identify inefficiencies, and recommend technical solutions to improve reliability and throughput.
Serve as an escalation point for network faults, performing structured troubleshooting to restore service and document root cause.
Administer physical and virtual server environments, including hypervisor management, operating system patching, and storage configuration.
Perform system administration tasks such as user account management, access control, directory services, and backup and recovery.
Plan and execute system and infrastructure upgrades, sequencing work to minimize disruption to ongoing operations.
Support cloud and hybrid environments, including virtual networks, access controls, and connectivity between cloud and on-premises resources.
Implement and maintain firewall rules, access control lists, and network segmentation in line with established security policy.
Harden systems and network devices against established security baselines and support remediation of identified vulnerabilities.
Support the Security Operations Center in investigating security events affecting network and system infrastructure.
Apply cybersecurity best practices to day-to-day configuration and change activity.
Develop scripts and automation to reduce repetitive configuration and administration tasks, using tools such as Python, PowerShell, or Ansible.
Configure and maintain monitoring and alerting for network and system health, availability, and performance.
Produce recurring reporting on infrastructure status and utilization for technical and program leadership.
Develop and maintain standard operating procedures (SOPs), network and system diagrams, configuration baselines, and troubleshooting guides.
Collaborate with Software Engineers, Field IT staff, and other technical teams to translate operational requirements into working solutions.
Provide technical guidance and cross-training to Technical Associates and junior staff.
Stay current with emerging infrastructure technologies and security practices, and recommend adoption where they support mission objectives.