Keywords: Linux Systems Engineering, Open‑Source Infrastructure, Systems Integration, Production Environments, High Availability, Fault‑Tolerant Systems, Enterprise Infrastructure, Hardware Installation, Hardware Troubleshooting, Data Center Operations, Python Development, Object‑Oriented Programming, Java, C++, C#, Application Development, Custom Software Development, Systems‑Level Development, Configuration Translation, Ansible, Infrastructure Automation, Configuration Management, Provisioning Frameworks, Virtualization, KVM, QEMU, Containerization, Docker, Podman, HAProxy, NGINX, Keepalived, Apache Kafka, RabbitMQ, Elasticsearch, OpenSearch, PostgreSQL, MySQL, Redis, Zookeeper, Monitoring, Observability, Zabbix, Grafana, Prometheus, InfluxDB, OpenTelemetry, Graphite, Metrics Collection, Alerting, Networking, VLANs, DNS, DHCP, Firewalls, VPNs, Load Balancing, Storage Systems, RAID, ZFS, Block Storage, Object Storage, Git, GitLab, GitLab CI/CD, Jenkins, Continuous Integration, Deployment Automation, Cloud Platforms, AWS, Azure, GCP, Secure Infrastructure Design, Government Environments, Regulated Environments, Security Clearance, Secret Clearance, Top Secret Clearance. Qualifications: 7+ years as a Systems Engineer working in Linux environments 7+ years of development experience in Python or similar object‑oriented language (Java, C++, C#, etc.), with clearly described projects beyond scripting 4+ years of hands‑on Ansible experience, including real configuration management and automation work Demonstrated experience deploying and operating open‑source software in production Strong systems integration background across hardware, software, networking, and security Deep Linux expertise (Ubuntu, Debian, RHEL/CentOS) Experience with technologies such as: HAProxy, NGINX, Keepalived PostgreSQL / MySQL Elasticsearch / OpenSearch Kafka / RabbitMQ Docker / Podman, KVM/QEMU Monitoring & observability stacks (Zabbix, Grafana, Prometheus, InfluxDB, OpenTelemetry) Familiarity with cloud platforms and CI/CD tooling (Git, GitLab, Jenkins) Self‑starter comfortable operating autonomously with accountability Active Secret clearance preferred (or equivalent recent clearance); must be able to obtain Top Secret.