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Top Senior System Administrator Jobs

17+ Job Results
10 Hours Ago
Littleton, CO, USA
14,500 Employees
96K-145K Annually
Senior level
14,500 Employees
96K-145K Annually
Senior level
Aerospace • Cloud • Digital Media • Information Technology • Mobile • News + Entertainment • Retail
As a Senior Systems Administrator, you will deploy, maintain, and manage network infrastructure, utilize AWS and VMware technologies, troubleshoot various databases, and ensure network reliability through effective system administration and operations.
Top Benefits:
401-K
401-K Matching
Adoption Assistance
+63 More
19 Hours Ago
Nashua, NH, USA
Hybrid
40,000 Employees
92K-157K Annually
Mid level
40,000 Employees
92K-157K Annually
Mid level
Aerospace • Hardware • Information Technology • Security • Software • Cybersecurity • Defense
The Sr System Administrator role involves supporting classified and unclassified lab environments, managing Windows and Linux systems, and implementing networked infrastructure. Responsibilities include system configuration, troubleshooting, responding to outages, and working with security staff to enforce compliance. Candidates need customer service skills and the ability to quickly learn new technologies.
Top Benefits:
401-K
401-K Matching
Adoption Assistance
+76 More
19 Hours Ago
Nashua, NH, USA
Hybrid
40,000 Employees
92K-157K Annually
Senior level
40,000 Employees
92K-157K Annually
Senior level
Aerospace • Hardware • Information Technology • Security • Software • Cybersecurity • Defense
As a Senior System Administrator, you will manage Linux servers, design and implement lab infrastructure, monitor system performance, and maintain system security in compliance with customer standards. You will collaborate with other teams to improve system efficiency and manage software upgrades, while ensuring 24/7 uptime service.
Top Benefits:
401-K
401-K Matching
Adoption Assistance
+76 More
8 Days Ago
San Diego, CA, USA
Hybrid
40,000 Employees
127K-215K Annually
Senior level
40,000 Employees
127K-215K Annually
Senior level
Aerospace • Hardware • Information Technology • Security • Software • Cybersecurity • Defense
In this role, you will design, implement, and manage lab infrastructure to meet customer requirements, focusing on Linux server management, network design, system security hardening, and collaboration server maintenance. You will also handle system upgrades, performance monitoring, and scripting for automation while ensuring a 24x7 uptime service.
Top Benefits:
401-K
401-K Matching
Adoption Assistance
+76 More
16 Days Ago
Field, KY, USA
14,420 Employees
104K-182K Annually
Senior level
14,420 Employees
104K-182K Annually
Senior level
Information Technology • Security • Cybersecurity
This role involves designing, building, and maintaining an end-to-end Security Operations Center (SOC) infrastructure, configuring operating systems and software, executing cyber hardening, and preparing technical documentation. The ideal candidate will have extensive experience in both Linux and Windows systems, as well as transitioning to cloud environments, and will play a key role in a newly created systems engineering team supporting USCYBERCOM.
Top Benefits:
401-K
Dental Insurance
Employee Stock Purchase Plan
+8 More
16 Days Ago
Colorado Springs, CO, USA
14,420 Employees
83K-169K Annually
Senior level
14,420 Employees
83K-169K Annually
Senior level
Information Technology • Security • Cybersecurity
The Senior System Administrator is responsible for maintaining system security, managing network rights, executing data recovery plans, installing and troubleshooting servers, and ensuring compliance with operational procedures. They will work with both Windows and Linux systems and utilize various virtualization technologies to manage resources effectively.
Top Benefits:
401-K
Dental Insurance
Employee Stock Purchase Plan
+8 More
16 Days Ago
Colorado Springs, CO, USA
14,420 Employees
83K-169K Annually
Senior level
14,420 Employees
83K-169K Annually
Senior level
Information Technology • Security • Cybersecurity
As a Senior System Administrator, you will work with hardware in data centers, troubleshoot hardware/software issues, implement performance management for virtual systems, maintain security protocols, and document system administration procedures. You will also handle server resources and conduct system repairs, ensuring operational continuity and compliance with organizational policies.
Top Benefits:
401-K
Dental Insurance
Employee Stock Purchase Plan
+8 More
13 Minutes Ago
Boston, MA, USA
438 Employees
Senior level
438 Employees
Senior level
Financial Services
The Associate Director, System Administrator will be key in managing daily IT operations, ensuring system integrity, supporting infrastructure platforms, and refining support processes. Responsibilities include overseeing patching, backups, monitoring, documentation, troubleshooting, and fostering teamwork across technical services.

Featured Jobs

30 Minutes Ago
Rochelle Park, NJ, USA
34 Employees
Senior level
34 Employees
Senior level
Information Technology
The Senior System Administrator will develop, implement, and support various systems administration and network initiatives for clients. Responsibilities include troubleshooting, managing Office 365 and Azure, and ensuring effective operations of switches and firewalls.
2 Days Ago
Patuxent River Estates, MD, USA
1,413 Employees
95K-159K Annually
Mid level
1,413 Employees
95K-159K Annually
Mid level
Cloud • Information Technology
The Senior System Administrator will manage a 24x7 IT team at the Patuxent River Data Center, providing support, training, and documentation. Responsibilities include system monitoring, maintenance of Windows OS and Unix/Linux, physical security oversight, and ensuring effective communication during shift turnover and meetings.
5 Days Ago
Louise, TX, USA
10,975 Employees
Senior level
10,975 Employees
Senior level
Healthtech
Senior System Administrators manage and maintain IT infrastructure, oversee software functions, and ensure data transfers and connectivity. They provide technical support, create policies for documentation and problem-solving, and consult on complex business applications, often with limited oversight. This role requires extensive experience and involves both daily management and strategic improvements to the IT systems.
Top Benefits:
401-K
Dental Insurance
Disability Insurance
+11 More
7 Days Ago
Chantilly, VA, USA
110 Employees
Senior level
110 Employees
Senior level
Information Technology
The Senior System Administrator will support a Sponsor's program by establishing server baselines, configuring, building and maintaining servers, providing installation services, and performing operating system updates and upgrades. The candidate will work as part of an Agile team in a dynamic environment.
8 Days Ago
Huntsville, AL, USA
3,092 Employees
Senior level
3,092 Employees
Senior level
Hardware • Security
The Senior System Administrator designs, implements, and maintains server, storage, database, network, and communication infrastructure. Responsibilities include applying security measures, administering Windows and Linux operating systems, managing Active Directory, configuring vulnerability scans, and providing technical leadership to other administrators.
9 Days Ago
Hanover, MD, USA
17,673 Employees
94K-198K Annually
Senior level
17,673 Employees
94K-198K Annually
Senior level
Information Technology
The Senior System Administrator for ICAM will obtain and configure virtual machines, load operating systems, perform security hardening, patching, monitoring, and support in maintaining security certification. This role requires collaboration with security professionals and includes the responsibility of documenting procedures and technical details.
Top Benefits:
401-K
Adoption Assistance
Child Care Benefits
+19 More
10 Days Ago
Elkridge, MD, USA
66 Employees
Expert/Leader
66 Employees
Expert/Leader
Big Data • Software • Analytics
Join ClearEdge as a Senior System Administrator to work with a platform team in providing essential and reliable systems for a great user experience. Responsibilities include implementing, troubleshooting, and maintaining IT systems, managing mission-critical systems, and optimizing system performance. Must have strong VMware skills and an Active or current TS/SCI Polygraph clearance. Ideal candidate is self-motivated, enjoys working in a technical team, and has a desire to learn new technologies.
17 Days Ago
Baltimore, MD, USA
378 Employees
Expert/Leader
378 Employees
Expert/Leader
Information Technology • Professional Services • Security
The Senior System Administrator will design, configure, and deploy managed Windows Server environments, including Failover Servers and application servers. The role involves maintaining existing infrastructures, managing virtualization environments, troubleshooting network protocols, and executing backup strategies. Advanced knowledge of Windows Server infrastructures, PowerShell automation, and teaming with vendors for system upgrades is essential.
Top Benefits:
401-K
Commuter Benefits
Company Outings
+12 More
17 Days Ago
Baltimore, MD, USA
378 Employees
Senior level
378 Employees
Senior level
Information Technology • Professional Services • Security
The Senior System Administrator will design, configure, and deploy Windows Server environments, manage virtualization with Microsoft technologies, and ensure the infrastructure remains performant and recoverable. Responsibilities include troubleshooting network protocols, overseeing backup strategies, and developing documentation for server maintenance.
Top Benefits:
401-K
Commuter Benefits
Company Outings
+12 More
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