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System Administrator Iii Jobs (NOW HIRING)

Saalex

System Administrator III

San Diego, CA

$100K - $170K/yr

Saalex Corporation is seeking multiple System Administrator III in Tidewater, VA and San Diego, CA. Saalex Corp., is an Engineering and Information Technology Services company with a focus on Test ...

Saalex

$100K - $170K/yr

Saalex Corporation is seeking multiple System Administrator III in Tidewater, VA and San Diego, CA. Saalex Corp., is an Engineering and Information Technology Services company with a focus on Test ...

Saalex

System Administrator III

San Diego, CA · On-site

$100K - $170K/yr

Saalex Corporation is seeking multiple System Administrator III in Tidewater, VA and San Diego, CA. Saalex Corp., is an Engineering and Information Technology Services company with a focus on Test ...

Saalex

$100K - $170K/yr

Saalex Corporation is seeking multiple System Administrator III in Tidewater, VA and San Diego, CA. Saalex Corp., is an Engineering and Information Technology Services company with a focus on Test ...

Saalex

$100K - $170K/yr

Saalex Corporation is seeking multiple System Administrator III in Tidewater, VA and San Diego, CA. Saalex Corp., is an Engineering and Information Technology Services company with a focus on Test ...

Saalex Corp.

System Administrator III

San Diego, CA · On-site

$100K - $170K/yr

Saalex Corporation Saalex Corporation is seeking multiple System Administrator III in Tidewater, VA and San Diego, CA . Saalex Corp., is an Engineering and Information Technology Services company ...

Onward Energy

System Administrator III

Denver, CO

System Administrator III Reports To: Director Technology Services Direct Reports: No Functional Unit: IT FLSA Status: Exempt Position Type: Full-Time Location: Denver, CO (Hybrid) The Company Onward ...

Onward Energy

System Administrator III

Denver, CO · On-site

$110K - $130K/yr

System Administrator III Reports To: Director Technology Services Direct Reports: No Functional Unit: IT FLSA Status: Exempt Position Type: Full-Time Location: Denver, CO (Hybrid) The Company Onward ...

Onward Energy

System Administrator III

Denver, CO · On-site

System Administrator III Reports To: Director - Technology Services Direct Reports: No Functional Unit: IT FLSA Status: Exempt Position Type: Full-Time Location: Denver, CO (Hybrid) The Company ...

Dcode Talent LLC

System Administrator 3

Richmond, VA · On-site

System Administrator 3 Location: 202 North 9th Street Richmond, VA 23219 Duration: 06/01/2026 & End Date: 12/04/2026 Position Overview The Virginia Office of the Attorney General (OAG) seeks 2 ...

JS Consulting

System Administrator III

Bridgeton, MO · On-site

Job Title- System Administrator III Project Location - Onsite in Bridgeton, MO Duration- Full-time Status- Must be a US citizen. Benefits- PTO, Holiday Pay, Healthcare, Profit-Sharing, Tuition ...

Onward Energy

System Administrator III

Denver, CO

System Administrator III Reports To: Director Technology Services Direct Reports: No Functional Unit: IT FLSA Status: Exempt Position Type: Full-Time Location: Denver, CO (Hybrid) The Company Onward ...

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System Administrator Iii information

See salary details

$41K

$88.9K

$137.5K

How much do system administrator iii jobs pay per year?

As of Sep 10, 2026, the average yearly pay for system administrator iii in the United States is $88,927.00, according to ZipRecruiter salary data. Most workers in this role earn between $70,000.00 and $104,000.00 per year, depending on experience, location, and employer.

What is a system administrator III?

A System Administrator III is a senior-level IT professional responsible for managing and maintaining an organization’s computer systems, servers, and network infrastructure. Their duties typically include installing, configuring, and troubleshooting hardware and software, ensuring system security, performing backups, and monitoring system performance. They may also mentor junior administrators, handle escalated technical issues, and contribute to IT policy and planning. System Administrator IIIs play a critical role in ensuring the reliability, security, and efficiency of IT operations within an organization.

What skills and qualifications are needed to thrive as a system administrator III?

To thrive as a System Administrator III, you need advanced knowledge of operating systems, networking, server management, and typically a bachelor's degree in computer science or a related field. Experience with virtualization platforms, scripting languages (such as PowerShell or Bash), and certifications like CompTIA Server+, Microsoft Certified: Windows Server, or Red Hat Certified Engineer are highly valued. Strong problem-solving, communication, and organizational skills help distinguish top professionals in this role. These abilities are crucial for ensuring system reliability, efficient troubleshooting, and secure, seamless IT operations.

How does a system administrator III typically collaborate with other IT teams to ensure system reliability?

As a System Administrator III, you will often work closely with network engineers, security analysts, and application support teams to maintain and improve system reliability. This collaboration may involve jointly diagnosing complex issues, coordinating software updates, and implementing new security protocols. You’ll attend regular cross-departmental meetings to align on infrastructure changes and may lead troubleshooting sessions during critical incidents. Effective communication and documentation skills are essential, as you’ll serve as a bridge between technical teams and management, ensuring seamless operations.

What is the difference between System Administrator Iii vs Network Administrator?

AspectSystem Administrator IiiNetwork Administrator
CertificationsCompTIA Network+, Microsoft Certified Solutions Expert (MCSE)CompTIA Network+, Cisco CCNA
Work EnvironmentData centers, server rooms, enterprise IT environmentsNetwork operations centers, office networks, infrastructure setups
ResponsibilitiesServer management, system updates, security, troubleshootingNetwork configuration, monitoring, troubleshooting, security

The System Administrator Iii and Network Administrator roles share certifications and work environments related to IT infrastructure. However, the System Administrator Iii typically manages servers and enterprise systems, while the Network Administrator focuses on network infrastructure and connectivity. Both roles are essential in maintaining organizational IT operations, but their core responsibilities differ based on system versus network management.

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System Administrator Iii jobs near you
Infographic showing various System Administrator Iii job openings in the United States as of September 2026, with employment types broken down into 1% As Needed, 85% Full Time, 12% Part Time, and 2% Contract. Highlights an 91% Physical, 2% Hybrid, and 7% Remote job distribution, with an average salary of $88,927 per year, or $42.8 per hour.

System Administrator III

Fort George G Meade, MD • On-site

Reflexive Concepts
11 - 50 employees
Learn more about Reflexive Conceptsexternal

Other

Posted 15 days ago

Job description

Reflexive Concepts is seeking a skilled System Administrator III to join our team!

Reflexive Concepts is looking for a System Administrator III to sustain a large-scale Linux computing environment supporting a critical mission. In this role you will install and maintain COTS/GOTS/FOSS software, handle day-to-day operations, monitoring, and problem resolution across the compute, network, memory, and storage components of the system. You will also maintain the security integrity of the environment, configure network components, and implement operating system enhancements that improve reliability and performance.

Qualifications:
  • Active TS/SCI + FS Polygraph
  • Fifteen (15) years of experience as a Systems Administrator in programs and contracts of similar scope, type, and complexity, plus a Bachelor's degree in a technical discipline from an accredited college or university OR
  • Twenty (20) years of experience as a Systems Administrator in programs and contracts of similar scope, type, and complexity, in lieu of a Bachelor's degree (five (5) years of additional Systems Administration experience may be substituted for the degree).
  • Security+ certification
Required Skills + Experience:
  • Experience using the Linux CLI
  • Experience developing scripts using Bash/Python
  • Experience in performing System Administration including installation, configuration, and support of COTS/GOTS/FOSS software in a large-scale Linux cluster environment
  • General technical knowledge regarding compute, network, memory, and storage system components
  • Experience with Red Hat Satellite systems management solution
  • Familiarity using Splunk for ingesting, indexing, searching, monitoring, and analyzing big data
  • Experience with the sustainment and support of large Linux clusters including day-to-day operations, monitoring and problem resolution
  • Experience configuring and sustaining VMware ESXi/Virtualization environments
  • Experience with IaC (Infrastructure as Code) principles and automation tools such as SaltStack and Ansible
  • Experience with corporate STE/STN security compliance policies and procedures
  • Experience using system monitoring tools such as HPE One View and Nagios
  • Experience with containerization technologies such as Docker
Desired Skills + Experience
  • Experience with container orchestration technologies such as Kubernetes
  • Experience with distributed files systems such as Weka, CEPH, GPFS, and HDFS
  • Experience with the Atlassian Suite of Tools such as Jira and Confluence
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