Linux System Administrator – Mid Level (TS/SCI)

Vantor•Herndon, VA

3d•$102,000 - $149,600•Onsite

About The Position

Vantor is seeking a Linux System Administrator to join its infrastructure team at its Herndon, Virginia facility. The role supports mission partners and works with software development DevOps and cybersecurity teams to create and maintain a private cloud and big-data platform. The team supports software applications on self-managed cloud infrastructure with a footprint exceeding 10 petabytes, working in a fast-paced environment where prototyping and iterative feedback support mission needs. The position is full-time and performed on-site in a SCIF. Candidates must be U.S. citizens and hold an active Top Secret/SCI clearance; they must also be willing and able to obtain a CI polygraph. Employment in cleared roles is contingent upon verification of clearance status.

Requirements

U.S. citizenship.
Current Top Secret/SCI security clearance and willingness and ability to obtain a CI polygraph.
Willingness to work full-time on-site in a SCIF in Herndon, Virginia.
At least 8 years of demonstrated Linux system administration experience with RHEL-based distributions, or 5 years with a bachelor's degree in Computer Science.
Experience administering physical servers and virtual machines.
A certification meeting DoD 8570/8140 cybersecurity workforce requirements, such as CompTIA Security+, ISC2 SSCP, or GIAC GSEC.
Experience configuring and using server remote-access tools such as PuTTY, MobaXterm, or Windows RDP.
Tier 3-level support experience and mature troubleshooting skills in complex computing environments.
Experience administering virtualization platforms supporting Linux virtual machines, such as OpenStack, Proxmox, or VMware.
Experience administering commercial cloud environments supporting Linux workloads, such as AWS, Azure, or Google Cloud Platform.
Hands-on experience with host endpoint security tools such as Tenable Nessus, Trellix, Flexera, Carbon Black, or ArcSight/CRIBL.
Hands-on experience with GitLab for workflow management and source-code configuration control.
Ability to work independently and take initiative.
Ability to adjust quickly to ad hoc requests and support a broad range of tasks, including software upgrades, patching, system monitoring, and R&D.
Ability to collaborate effectively in a diverse team across the technology stack and balance team-based and independent work.
Strong verbal, written, and organizational skills.

Nice To Haves

One or more relevant Linux certifications, such as RHCSA, RHCE, LPIC-1/2/3, or LFCS.
Bachelor's degree in Computer Science, Information Systems, Software Engineering, or a related field.
Master's degree in Computer Science, Information Systems, Software Engineering, or a related field; may count as up to two years of experience depending on qualifications.
Linux system administration experience with Rocky Linux 8, 9, or 10.
Experience configuring RHEL-based Linux security settings to comply with DISA Security Technical Implementation Guides (STIGs).
Experience with Python scripting, tools, or application development.
Experience with Linux distributions outside the RHEL family, such as Debian, Ubuntu, Kali, or Alpine.
Experience configuring CI/CD pipelines in GitLab.
Experience with Docker or Podman and Packer.
Hands-on OpenStack administration, deployment, or upgrades.
Hands-on CEPH administration, deployment, or upgrades.
Experience with Kubernetes or Nomad orchestration.
Experience deploying, upgrading, and maintaining big-data software stacks, including Hadoop, HDFS, YARN, and Elasticsearch.
Experience with cybersecurity accreditation processes, including RMF, ATO, and NIST 800-53 controls.
Experience with Static Application Security Testing tools such as GitLab SAST, SonarQube, or Fortify.
Experience working with GPUs and virtualizing GPU resources.

Responsibilities

Monitor the platform for hardware and software outages and respond to them.
Assist OpenStack Cloud Platform tenants and users with troubleshooting and requests through chat services.
Implement cybersecurity remediations in cooperation with the cybersecurity team.
Upgrade and deploy applications on the platform.
Integrate new hardware into multiple compute clusters.
Review and update procedures and documentation.
Collaborate on future hardware planning for system recapitalization and expansion.