1773 - System Administrator

Sigma Defense • $115K — $135K *
San Diego, CA 92154In-Person
Information Technology
Less than 5 years of experience
Today
Be an Early Applicant
Job Overview by Ladders

Qualifications

  • 3-7 years of relevant experience in system administration.
  • Proficient in administering Windows Server and/or RHEL systems.
  • Skilled in installing, configuring, and troubleshooting server operating systems.
  • Familiar with virtualization technologies like VMware ESXi.
  • Basic understanding of networking concepts and enterprise infrastructure.
  • Experience supporting secure Department of War environments and Cross Domain Solution (CDS) technologies.
  • Must be a U.S. citizen with the ability to obtain a TS/SCI security clearance.

Responsibilities

  • Install, configure, and maintain Windows and RHEL systems.
  • Perform routine operating system patching and software updates.
  • Maintain both physical and virtual server infrastructure.
  • Troubleshoot hardware, operating system, and application issues.
  • Support implementation of DISA STIGs and maintain system documentation.
  • Monitor system health and resolve operational issues to ensure performance.
  • Coordinate with cybersecurity and network engineering teams for system changes.

Benefits

  • Dental and Vision Insurance
  • Medical Insurance with HSA, FSA, and DFSA options
  • Life and AD&D coverage
  • Employee Assistance Program (EAP)
  • 401(k) Plan with Company Matching Contributions
  • 160 Hours of Paid Time Off (PTO)
  • 12 Floating Holidays
  • Educational Assistance
Full Job Description
System Administrator to join our team at March Air Reserve Base. This position plays a key role in maintaining secure Department of War information systems by administering Windows and Red Hat Enterprise Linux (RHEL) environments, performing routine maintenance and patching, and ensuring reliable system operations. The Systems Administrator works closely with the engineering and cybersecurity teams to maintain secure, stable, and mission-ready infrastructure supporting Department of War operations.

Requirements
  • 3-7 years of relevant experience.
  • Experience administering Windows Server and/or RHEL systems.
  • Experience installing, configuring, maintaining, and troubleshooting server operating systems.
  • Experience with virtualization technologies such as VMware ESXi.
  • Experience performing operating system patching, maintenance, and lifecycle support.
  • Basic understanding of networking concepts and enterprise infrastructure.
  • Experience supporting secure or air-gapped Department of War environments.
  • Experience with Cross Domain Solution (CDS) technologies.
  • Experience with Full Motion Video (FMV) systems, platforms, or supporting infrastructure.
  • Experience implementing or maintaining DISA Security Technical Implementation Guides (STIGs).
  • Experience maintaining secure Windows and/or RHEL system baselines.
  • Experience administering RHEL in physical or virtualized environments.
  • Experience with storage, backup, and disaster recovery solutions.
  • Must be a U.S. citizen.

Mandatory Certifications:
  • Security+ is required.
  • RHCSA is preferred.
  • Network+ is preferred.
  • Linux+ is preferred.
  • Server+ is preferred.

Computer Programs/Software:
  • Experience with Bash, PowerShell, Ansible, or other scripting and automation tools.

Personnel Clearance Level:
  • Candidate must possess or have the ability to obtain an active TS/SCI security clearance or higher.
  • Clearance may be sponsored for the right candidate.

Education Requirements:
  • Bachelor's degree from an accredited college or university in Information Technology or related field of study.

Essential Job Duties (not all-inclusive):
  • Install, configure, maintain, and troubleshoot Windows and RHEL systems.
  • Perform routine operating system patching, software updates, and system maintenance.
  • Maintain physical and virtual server infrastructure.
  • Configure and maintain user accounts, storage, system services, and server resources.
  • Troubleshoot hardware, operating system, and application issues.
  • Support implementation of DISA STIGs and approved system configuration changes.
  • Maintain system documentation, configuration baselines, and standard operating procedures.
  • Support system backups, recovery operations, and disaster recovery activities.
  • Support secure Cross Domain Solution (CDS) operations and associated system administration activities.
  • Coordinate with cybersecurity and network engineering personnel to implement approved system changes and maintain secure, reliable system operations.
  • Support testing, integration, and implementation of approved hardware and software changes.
  • Monitor system health, investigate operational issues, and resolve problems to maintain system availability and performance.

Salary Range: $115,000 - $135,000 annually.

Benefits
  • Dental and Vision Insurance
  • Medical Insurance to Include HSA, FSA, and DFSA Plans
  • Life and AD&D coverage
  • Employee Assistance Program (EAP)
  • 401(k) Plan with Company Matching Contributions
  • 160 Hours of Paid Time Off (PTO)
  • 12 (Floating) Holidays
  • Educational Assistance
  • Highly Competitive Salary

About Sigma Defense

Sigma Defense Careers

Joining Sigma Defense presents an unparalleled opportunity to become part of a leading team of defense solution professionals. This is a prime time for skilled individuals seeking job opportunities that promise both professional growth and a chance to be involved in cutting-edge innovation.

Work You’ll Do

At Sigma Defense, the focus is on empowering some of the most critical defense sectors through advanced technological solutions. The company helps these sectors master their operational challenges with robust, innovative solutions. Sigma Defense stands out in the marketplace, uniquely positioned at the nexus of technology, industry expertise, and digital innovation. This positioning allows the team to lead in the creation and implementation of transformative solutions. Professionals at Sigma Defense work alongside a global team of experts dedicated to excellence in defense solutions, driving leadership in the industry through strategic innovation and superior problem-solving capabilities.

Sigma Defense Job Opportunities

Sigma Defense is building a market-leading team to support and drive digital transformation in defense technology. The company offers a range of career paths from internships to full-time positions, focusing on cultivating leadership and advanced skills in the defense sector.

Innovative Work

Sigma Defense invites professionals to join its ranks, offering job opportunities that engage with the most trusted platforms and technologies in the defense industry. The team at Sigma Defense is known for its depth and breadth of consulting experience and a commitment to innovation that’s second to none.

Be Part of a Great Team

Engage in work that spans a variety of defense technologies and harness the capabilities of a team known for its global scale and collaborative approach. Sigma Defense promotes a culture of diversity and inclusion, ensuring a wide range of perspectives and ideas drive the company’s innovations.

Future-Proof Your Career

Sigma Defense is committed to the professional development of its team members, providing extensive training, development, and certification support. The company offers vast opportunities for career advancement, allowing individuals to reach their full potential based on ambition and performance.

Explore Sigma Defense

Discover how Sigma Defense is leading projects that redefine industry standards and enhance operational efficiencies. From advanced surveillance systems to strategic cybersecurity defenses, Sigma Defense is at the forefront of protecting national and global interests.

The Sigma Defense Experience

Sigma Defense not only offers a compelling array of job opportunities but also ensures that its team members enjoy significant benefits and a supportive work environment. The company values a culture where innovation, leadership, and teamwork are at the heart of every project.

Stay Connected

Join the Sigma Defense Team

Search for open positions that match your skills and interests. Sigma Defense seeks passionate, curious, and solution-driven team players for its various roles.

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Keep Up to Date

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Learn more about Sigma Defense
Industry
Aerospace & Defense
* Ladders Estimates

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