Senior System Integrator Engineer; TS​/SCI

Vexterra Group is currently searching for a Senior Systems Integrator Engineer to provide the following systems support in Reston VA or Bethesda, MD office.

• Perform Linux builds, installs, configuration, administration, and troubleshooting of both Linux and Windows platforms to include but not limited to base configuration, security and system patching, performance monitoring, etc.
• Provide O/S hardening (STIG, OpenSCAP, ACAS) and system patching.
• Develop server builds for virtual and physical environments.
• Manage, maintain, configure, and deploy system integration tools such as Kubernetes, Rancher, Helm.
• Support management and integration of Dev Ops tools such as Jenkins.
• Deploy, operate, diagnose, and maintain containerized (Docker) microservices across orchestrated (Kubernetes) environments.
• Maintain and orchestrate services and procedures for a big data pipeline which includes Kafka, Elasticsearch, and several in‑house written Python/Java running on Kubernetes.
• Develop scripts to monitor and check health of the deployed pipeline.
• Maintain and develop Dev Ops automation using tools (e.g., Saltstack, Ansible, Chef, Puppet).
• Design, develop, and support scalable, redundant infrastructure to include physical and virtualized environments.
• Set up administrator and service accounts, maintain system documentation, tune system performance, install system wide software, validate and implement critical system patches, and allocate mass storage space.
• Improve existing infrastructure to incorporate latest technology best practices and cross application integrations.
• Participate as needed in all phases of software development with emphasis on the planning, analysis, integration, and documentation phases.
• Manage the code transfer and modification.
• Conduct automated unit and system integration tests to identify and provide feedback on failed modules and components.
• Participate in code design reviews and updates.
• Support CM activities.
• Administer system‑to‑system data transfer and integration process.

• A Bachelor's Degree in Information Technology, or a closely related discipline.
• At least 6 years of relevant professional experience.
• Must have an active TS/SCI with Counterintelligence Poly.
• Experience in system integrations testing through a full system development life cycle, including implementing test plans, test cases and test processes.
• Experience with security requirements derivation.
• Experience documenting test results for corrective actions, reporting and audits.
• Excellent verbal and written communication skills.
• Ability to work in a team and also a self‑starter who can work on their own.
• Expertise in configuration, administration, and troubleshooting of Linux (RHEL/CentOS, Ubuntu), including kernel panic recovery, configuring SSSD, AIDE, SELinux, auditd, and O/S hardening – STIG, OpenSCAP, ACAS.
• Highly proficient with patching: yum repositories, APT repositories.
• Highly proficient with server builds: virtual and physical.
• Experience with installing and deploying Dev Ops tools, examples could include Chef, Puppet, Git, Docker, Jenkins, Ansible, Salt, etc.
• Knowledge of Atlassian software such as JIRA, JIRA Service Desk, Confluence, Bitbucket, Hip Chat, etc.
• DoD 8570 IAT II Certification (e.g., Security+).

• Kubernetes, Ansible, Puppet, Salt, Linux, Git, Python, Elasticsearch, Logstash, IPA, AWS, Open Stack, Java, Kafka, Hadoop, etc.
• Experience establishing large computer clusters.
• Experience in continuous configuration automation (CCA) methods for providing a flexible, programmatic platform for deploying and managing the configuration of infrastructure and application resources.
• Experience applying both agent‑based and agentless (e.g., SSH) methods to event‑driven orchestration and remote execution for configuration management.
• Experience applying automated configuration management and deployment tools (e.g., Puppet, Chef, Ansible, Salt) for configuration automation, cloud control, and event‑driven orchestration.