Linux Engineer with Security Clearance

Location: Washington, DC Area (Onsite) Position Overview

We are seeking a Linux Systems Engineer to support the administration, security, and performance of mission-critical enterprise infrastructure. This role will serve as a key member of a cross-functional technical team responsible for maintaining highly available environments, troubleshooting complex operational issues, and ensuring the reliability and security of production systems.

The ideal candidate is a hands-on systems professional with strong Linux expertise, cloud experience, and a passion for automation, operational excellence, and continuous improvement.

Key Responsibilities Administer and maintain enterprise Linux environments, including patch management, system monitoring, performance tuning, troubleshooting, and security hardening.

Support cloud-based and on-premises infrastructure, ensuring system reliability, availability, and scalability.

Manage and maintain storage, indexing, and data platform technologies, including upgrades, monitoring, backups, and operational support.

Configure, administer, and monitor web server environments and associated services.

Investigate system alerts, performance issues, and outages, performing root cause analysis and implementing long-term corrective actions.

Develop and maintain automation solutions to improve operational efficiency and reduce manual workloads.

Collaborate with infrastructure, application, networking, and security teams to resolve technical issues and support production operations.

Coordinate system changes, maintenance activities, upgrades, and deployments across multiple environments.

Participate in support rotations and respond to operational incidents when required.

Maintain system documentation, operational procedures, and configuration standards. Required Qualifications Strong experience administering enterprise Linux environments, including Red Hat Enterprise Linux, CentOS, or similar distributions.

Experience managing cloud infrastructure within AWS, Azure, or comparable cloud platforms.

Proficiency troubleshooting operating system, infrastructure, networking, and application-level issues.

Experience implementing operating system security best practices, vulnerability remediation, and system hardening.

Hands-on experience with infrastructure automation and scripting using technologies such as Python, Ansible, Shell scripting, or similar tools.

Experience supporting production environments with patch management, configuration management, monitoring, and system maintenance responsibilities.

Strong analytical and problem-solving abilities with the capability to independently resolve complex technical challenges.

Excellent communication and collaboration skills. Preferred Qualifications Experience supporting large-scale enterprise or mission-critical environments.

Knowledge of infrastructure-as-code technologies such as Terraform or similar automation frameworks.

Experience working with monitoring and observability tools such as Prometheus, Grafana, or equivalent platforms.

Familiarity with relational and non-relational database technologies including PostgreSQL, Oracle, Cassandra, Elasticsearch, or similar platforms.

Experience supporting web technologies such as NGINX, Envoy, Apache, or related solutions.

Knowledge of server hardware diagnostics and troubleshooting.

Experience with enterprise backup, recovery, and disaster recovery processes.

Familiarity with DevOps, Site Reliability Engineering (SRE), or cloud operations best practices.

Proven ability to take ownership of complex systems and drive issues through resolution. Desired Attributes Strong sense of ownership and accountability.

Proactive approach to identifying and resolving operational risks.

Ability to excel in fast-paced environments supporting critical infrastructure.

Commitment to security, reliability, and operational excellence.

Strong attention to detail and dedication to continuous improvement.