Linux Systems Administrator, Sr. with Security Clearance

Caelum Research Corporation; Maryland; In loco; USD 90.000 - 140.000; Tempo pieno

Vantaggi offerti da questo lavoro

401(k)

401(k) matching

Employee assistance program

Flexible spending account

Health insurance

Life insurance

Paid time off

Parental leave

Referral program

Vision insurance

Descrizione del lavoro

Caelum Research Corporation seeks a Senior Linux Systems Administrator to support a critical DoD IT services contract on-site at Aberdeen Proving Ground, MD. You will lead Linux infrastructure, automation, and high-availability workloads.

The role requires deep RHEL expertise, strong scripting, and security hardening per STIGs, plus mentoring junior staff and ensuring mission continuity in production environments.

Competenze

• Experience in Linux system administration in enterprise production environments.
• Strong scripting skills (bash, python, or similar) for automation.
• Experience with STIGs and security hardening for DoD/ government systems.
• Mentorship or lead experience is a plus.

Mansioni

• Install, configure, and manage Red Hat Linux servers and middleware.
• Mentor junior admins and provide senior-level guidance.
• Automate deployment, configuration, and maintenance tasks.
• Maintain high-availability infrastructure and perform capacity planning.
• Troubleshoot network, storage, and performance issues.

Conoscenze

Linux Administration

Automation

Scripting

High Availability

Networking

Formazione

Bachelor's Degree

Associate's Degree

High School Diploma / GED

Master's Degree

Strumenti

ACAS

RHEL

RHCSA/RHCE

Descrizione del lavoro

Clearance Requirement

DoD Secret

Location

On-site at Aberdeen Proving Ground, MD

Role Overview

We are seeking a highly skilled Senior Linux Systems Administrator to support a critical government IT services contract. The successful candidate will act as a primary subject matter expert for Linux infrastructure, automation, and high-availability systems. This role requires deep technical expertise in Red Hat Enterprise Linux (RHEL), enterprise production environments, and network storage. As a senior member of the team, the candidate will also provide technical guidance and mentorship to other IT professionals.

Core Responsibilities & Technical Qualifications

• Linux Systems Administration: Install, configure, and manage UNIX variants, with a heavy emphasis on Red Hat Linux server operating systems and associated middleware.
• Technical Mentorship: Act as a senior technical resource, providing mentorship, guidance, or team lead support to junior administrators and technical staff.
• Automation & Deployment: Manage complex production environments using automated installation, automated build and deployment, and automated configuration management frameworks.
• Scripting Proficiency: Write and utilize operating system commands and scripts to automate routine tasks, utilizing one or more of the following: Bash, Python, PowerShell, Ruby, or Perl.
• High-Availability Infrastructure: Build, maintain, and support clustered, scalable, and high-availability systems, including load balancing, web servers, application servers, and server virtualization.
• Networking & Troubleshooting: Apply foundational networking principles (TCP/IP, firewalls, routing, VLANs) to perform general network troubleshooting and resolve complex system issues.
• Performance Monitoring & Optimization: Utilize enterprise monitoring tools for event and performance monitoring. Conduct performance tuning, capacity planning, and bottleneck resolution.
• Security & Compliance: Apply Defense Information Systems Agency (DISA) Security Technical Implementation Guides (STIGs) to harden systems, remediate advanced security vulnerabilities, manage identity and access configurations, and ensure overall system security compliance.
• System Lifecycle Management: Plan and execute seamless operating system upgrades and environment migrations with minimal mission impact.

Preferred Qualifications

• Vulnerability Scanning (ACAS): Experience utilizing the Assured Compliance Assessment Solution (ACAS) for vulnerability scanning, analysis, and compliance reporting.
• Windows Administration: Familiarity or experience with Microsoft server operating systems, Windows event and performance monitoring, and Microsoft middleware.
• Database Technologies: Knowledge of database technologies, including installation and configuration of database management systems and migration of databases.

Education and Experience Requirements

• High School Diploma / GED: Minimum of 11 years of directly related IT experience.
• Associate's degree: Minimum of 9 years of directly related IT experience.
• Bachelor's Degree: Minimum of 7 years of directly related IT experience.
• Master's Degree: Minimum of 5 years of directly related IT experience.

Certifications

• DoD Directive 8570.01 Compliance: Must possess a current Security+ certification (or equivalent IAT Level II baseline certification).
• Computing Environment (CE): Must hold at least one current Computing Environment certification, or be able to obtain one within 6 months of start. Given the technical requirements of this role, a Linux-based certification (e.g., Red Hat Certified System Administrator [RHCSA] or Red Hat Certified Engineer [RHCE]) is strongly preferred.

Job Type & Salary

Full-time. Salary: $90,000 - $140,000 per year.

Benefits

• 401(k)
• 401(k) matching
• Employee assistance program
• Flexible spending account
• Health insurance
• Life insurance
• Paid time off
• Parental leave
• Referral program
• Vision insurance

Work Location

In person