Senior Linux System Administrator

Overview

i3 is looking for an experienced Senior Linux System Administrator to join our this role youll be the go-to person for keeping our mission-critical Linux systems secure stable and running smoothly. We work in a dynamic environment supporting multiple organizations so we need someone who communicates well adapts quickly and knows how to operate effectively.

Youll be working closely with our engineering and security teams to troubleshoot complex issues across both Linux and Windows platforms. Because of the nature of the mission you might occasionally need to jump in during off-hours to provide support but your primary focus will be day-to-day administration security and infrastructure stability.

Responsibilities

• System Administration & Security: Build and maintain our Linux configurations locking them down according to DISA STIGs and JSIG requirements. Youll also manage user accounts permissions and daily monitoring to make sure our hardware and key processes are highly available.
• Vulnerability Management: A big part of this job is keeping us secure. Youll run regular ACAS scans handle system patching and remediate vulnerabilities.
• DevOps & Infrastructure: You will own and administer our GitLab environment. This includes managing users configuring repositories and supporting CI/CD pipelines as well as handling containerization and Kubernetes.
• Operations: Youll take care of routine backups to ensure all our system data is recoverable and youll write and maintain the documentation for how our systems are installed and secured.

Qualifications

• Associates or Bachelors degree in Computer Science IT or a related field (or equivalent hands-on work experience).
• 10 years of Linux systems administrator experience specifically working inside classified environments.
• Active Top Secret clearance (including SAP Eligibility).
• U.S. Citizenship is required.
• Technical Skills:
• Deep experience working in a mixed OS environment (Red Hat Enterprise Linux and Windows Server).
• Strong scripting skillsyou should be comfortable writing in Bash Python or PowerShell.
• Real-world experience with GitLab CI/CD configurations Kubernetes and containerization.
• You need to be heavily familiar with DoD security practices ACAS and applying STIGs.
• Certifications: You must meet industry baseline requirements which means you need at least a CompTIA Security and a Red Hat certification (RHCSA or higher). Network and containerization certs are bonus.
• Security Practices: You need to know the ins and outs of OPSEC and PHYSEC measures and how to conduct yourself professionally in a classified environment.

Preferred:

• A Red Hat Certified Engineer (RHCE) certification.
• A Cisco certification (CCNA or above).
• Hands-on experience with virtualization specifically VMware (and related certifications).
• Experience using log centralizing tech like Splunk or the ELK Stack.

Knowledge/Skills

• Knowledge of office administration and procedures.
• Exceptional judgment capabilities and relationship management skills.
• Excellent communication teamwork and client service skills; ability to clearly communicate in discussions and written documents and to deliver feedback clearly and tactfully.
• Interact with a diverse array of customers and staff in a professional and courteous manner.
• Work independently with accountability for accurate and complete results.
• Be extremely organized and exceptionally detail oriented.
• Work well both independently and in a team environment.
• Be energized by a fast-paced work environment.
• Must be able to communicate with others effectively.
• Analyze information and respond appropriately.
• Manage time wisely and prioritize tasks.
• Provide superior customer service.
• Multi-task in a pleasant manner.
• Work well under pressure.

PHYSICAL DEMANDS

• The physical demands described here are representative of those that must be met by an employee to successfully perform the essential functions of this job.
• While performing the duties of this job the employee is regularly required to talk or hear. The employee frequently is required to stand; walk; handle or feel; and reach with hands and arms.
• The employee is occasionally required to sit; climb or balance; and stoop kneel crouch or crawl. The employee must be able to lift and/or move up to 10 pounds and occasionally lift and/or move up to 25 pounds.
• Specific vision abilities required by this job include close vision distance vision peripheral vision depth perception and ability to adjust focus.
• Regular i3 hours are 8:00 a.m. - 5:00 p.m. Monday-Friday however additional hours may be required on occasion. Regular and punctual attendance is required.

About i3

i3 is a technically diverse 100% team member owned business headquartered in Huntsville Alabama specializing in missile and aviation systems engineering and logistic services electronic warfare and electromagnetic effects analysis UAS system integration and flight operations full lifecycle C5ISR engineering services cybersecurity and IT/IA innovative solutions and virtual training simulation & serious game development and implementation. We have established a broad offering of products and capabilities collectively providing decades of experience supporting the full complement of DoD military services Missile Defense Agency National Aeronautics and Space Administration and a variety of other Government organizations and private industry customers.

Perks of being a team member owner include:

• Long-term financial security
• Higher job satisfaction
• Greater job security
• Personal and professional growth
• Great company culture

Other outstanding benefits:

• Excellent insurance coverage
• 401(k) match
• Generous PTO
• Health and wellness incentives
• Tuition and certification reimbursement
• Countless opportunities to give back to the community through i3 Cares

We work hard. We compete hard. We play hard. Apply now to join us!

Required Experience:

Senior IC