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Senior It Systems Administrator Jobs (NOW HIRING)

Senior IT Systems Administrator

San Diego, CA · On-site

$115K - $155K/yr

  • Medical

  • Retirement

  • PTO

Role: Senior IT Systems Administrator Location: San Diego, CA (in-office) Salary: $115,000 - $155,000 / yr + stock options, 401k matching, and other benefits Role Overview: Seasats is growing rapidly ...

Senior IT Systems Administrator

Blacksburg, VA · On-site

$75K - $102K/yr

Senior IT Systems Administrator Apply now Back to search results Job no: 536142 Work type: Staff Senior management: Vice President for Research Department: VTNSI Location: Blacksburg, Virginia ...

Senior IT Systems Administrator

Reston, VA · On-site +1

$89K - $121K/yr

  • Medical

  • Dental

  • Vision

  • Life

  • Retirement

Scout is seeking a skilled Senior IT Systems Administrator to lead the design, implementation, and management of our internal IT systems as we transition from third-party managed services to a ...

Senior IT Systems Administrator

Reston, VA · On-site

$89K - $121K/yr

  • Medical

  • Dental

  • Vision

  • Life

  • Retirement

Scout is seeking a skilled Senior IT Systems Administrator to lead the design, implementation, and management of our internal IT systems as we transition from third-party managed services to a ...

Senior IT Systems Administrator

Reston, VA · Hybrid

$89K - $121K/yr

Scout is seeking a skilled Senior IT Systems Administrator to lead the design, implementation, and management of our internal IT systems as we transition from third-party managed services to a ...

Sr. IT Systems Administrator, IT Applications

Hawthorne, CA · On-site

$115K - $150K/yr

  • Medical

  • Dental

  • Vision

  • Life

  • Retirement

  • PTO

Today SpaceX is actively developing the technologies to make this possible, with the ultimate goal of enabling human life on Mars. SR. IT SYSTEMS ADMINISTRATOR, IT APPLICATIONS As a Senior IT Systems ...

Sr. IT Systems Administrator, IT Applications

Hawthorne, CA · On-site

$115K - $150K/yr

  • Medical

  • Dental

  • Vision

  • Life

  • Retirement

  • PTO

Today SpaceX is actively developing the technologies to make this possible, with the ultimate goal of enabling human life on Mars. SR. IT SYSTEMS ADMINISTRATOR, IT APPLICATIONS As a Senior IT Systems ...

Sr. IT Systems Administrator, IT Applications

Redmond, WA · On-site

$115K - $150K/yr

  • Medical

  • Dental

  • Vision

  • Life

  • Retirement

  • PTO

Today SpaceX is actively developing the technologies to make this possible, with the ultimate goal of enabling human life on Mars. SR. IT SYSTEMS ADMINISTRATOR, IT APPLICATIONS As a Senior IT Systems ...

Sr. IT Systems Administrator, IT Applications

Redmond, WA · On-site

$115K - $150K/yr

  • Medical

  • Dental

  • Vision

  • Life

  • Retirement

  • PTO

Today SpaceX is actively developing the technologies to make this possible, with the ultimate goal of enabling human life on Mars. SR. IT SYSTEMS ADMINISTRATOR, IT APPLICATIONS As a Senior IT Systems ...

IT Systems Administrator

Fenton, MO · On-site

  • Retirement

  • PTO

Working alongside an IT Systems Specialist and senior IT Director, this role is responsible for the reliability, security, and performance of servers, virtualization, network, and cloud ...

Senior IT Systems Administrator

Blacksburg, VA · On-site

$74K - $101K/yr

The Virginia Tech National Security Institute (VTNSI) seeks a highly skilled and experienced IT professional to join our team as an IT Systems Administrator to support multiple research testbeds and ...

New

Senior IT Systems Administrator 1

Warrendale, PA · On-site

$120K - $170K/yr

  • Medical

  • Dental

  • Vision

  • Life

  • Retirement

We're looking for a Senior IT Systems Administrator to join our team. This successful person will manage our Linux-based infrastructure and our Windows-11 developer fleet using WSL for Linux ...

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Showing results 1-20

Senior It Systems Administrator information

See salary details

$49K

$102.2K

$143.5K

How much do senior it systems administrator jobs pay per year?

As of Aug 17, 2026, the average yearly pay for senior it systems administrator in the United States is $102,229.00, according to ZipRecruiter salary data. Most workers in this role earn between $86,000.00 and $116,500.00 per year, depending on experience, location, and employer.

What is a senior IT systems administrator?

Senior IT Systems Administrators are experienced professionals responsible for managing, maintaining, and securing an organization's computer systems and networks. They oversee system performance, troubleshoot complex technical issues, and implement upgrades or new technologies. Additionally, they may lead IT projects, mentor junior staff, and ensure the organization's IT infrastructure aligns with best practices and business goals.

What are the key skills and qualifications needed to thrive as a senior IT systems administrator?

To thrive as a Senior IT Systems Administrator, you need deep knowledge of systems architecture, network management, and security protocols, usually backed by a bachelor’s degree in IT or a related field. Mastery of tools like Windows/Linux servers, virtualization platforms (e.g., VMware), cloud services (e.g., AWS, Azure), and certifications such as CompTIA, Microsoft, or Cisco are highly valued. Strong problem-solving, communication, and project management skills help you lead teams and resolve complex technical issues efficiently. These abilities ensure secure, reliable IT infrastructure and support organizational productivity and growth.

What are some common challenges faced by senior IT systems administrators, and how can they be addressed?

Senior IT Systems Administrators often encounter challenges such as managing complex, multi-platform environments, ensuring system security, and minimizing downtime during upgrades or maintenance. Staying updated with emerging technologies and best practices is essential to address these issues effectively. Strong communication and collaboration skills are also vital, as the role frequently involves coordinating with other IT teams and departments to implement solutions and resolve issues swiftly. Proactive monitoring, continuous learning, and thorough documentation help mitigate these challenges and ensure smooth system operations.

What is the difference between Senior It Systems Administrator vs Network Engineer?

AspectSenior It Systems AdministratorNetwork Engineer
CertificationsCompTIA Network+, Cisco CCNA, Microsoft certificationsCCNA, CCNP, Cisco certifications
Work EnvironmentManaging servers, systems, and infrastructure within organizationsDesigning, implementing, and maintaining network infrastructure
Employer & Industry UsageIT departments across various industriesTelecommunications, large enterprises, data centers
Common Search/ComparisonYesYes

The main difference between a Senior It Systems Administrator and a Network Engineer lies in their focus areas. The Senior It Systems Administrator manages overall IT systems, servers, and infrastructure, ensuring smooth operation. In contrast, the Network Engineer specializes in designing, implementing, and maintaining network infrastructure. Both roles require similar certifications and often work within the same environments, but their core responsibilities differ based on their focus on systems versus networks.

What cities are hiring for Senior It Systems Administrator jobs?

Cities with the most Senior It Systems Administrator job openings:

What are the most commonly searched types of It Systems Administrator jobs?

The most popular types of It Systems Administrator jobs are:

What states have the most Senior It Systems Administrator jobs?

States with the most job openings for Senior It Systems Administrator jobs include:

Infographic showing various Senior It Systems Administrator job openings in the United States as of August 2026, with employment types broken down into 1% As Needed, 85% Full Time, 9% Part Time, 4% Contract, and 1% Nights. Highlights an 88% Physical, 3% Hybrid, and 9% Remote job distribution, with an average salary of $102,229 per year, or $49.1 per hour.

Senior IT Systems Administrator

Seasats

San Diego, CA • On-site

$115K - $155K/yr

Full-time

Medical, Retirement, PTO

Re-posted 19 days ago


Job description

Role: Senior IT Systems Administrator

Location: San Diego, CA (in-office)

Salary: $115,000 - $155,000 / yr + stock options, 401k matching, and other benefits

Role Overview:

Seasats is growing rapidly, and we're looking for a Senior IT Systems Administrator to become the dedicated owner of our internal IT systems.

You'll support a team of approximately 100 people working across software, engineering, manufacturing, operations, and field testing. Your job will be to make sure employees have secure, reliable, and well-supported technology, and to build the systems and processes that will continue working as the company grows.

You'll handle day-to-day support, administer our core business systems, manage employee devices and accounts, improve our office networks, and strengthen our security practices. At the same time, you'll have substantial freedom to evaluate our current environment and establish a thoughtful, scalable approach to IT.

We're looking for someone who enjoys taking ownership and fixing immediate problems, and is excited to mature our enterprise processes over time.

Role Details:

As Seasats' primary IT professional, you will own internal IT across the company. Your responsibilities will include:

  • Serving as the primary point of contact for employee IT support
  • Troubleshooting devices, accounts, applications, networks, and office technology
  • Managing employee onboarding, access changes, and offboarding
  • Administering Google Workspace, identity, endpoint, password, and collaboration systems
  • Managing company devices, software, licenses, security, inventory, and replacement planning
  • Designing and maintaining reliable office networks across our facilities
  • Supporting conference rooms, audiovisual equipment, and shared workspaces
  • Partnering with engineering and operations on IT needs in office spaces, labs, manufacturing facilities, and field environments
  • Supporting security and compliance efforts through documentation, controls, audits, and customer questionnaires
  • Creating clear documentation and self-service resources
  • Developing the company's IT roadmap and budget

This role primarily supports Seasats' internal business technology. It is distinct from the software and infrastructure used to operate our autonomous vehicles, although you'll work closely with those technical teams and may occasionally help connect the two environments safely.

    About You:

    You are an experienced IT generalist who can operate independently and take responsibility for an entire company's internal technology environment. You are comfortable helping an employee with a laptop problem, configuring an identity provider, troubleshooting a network issue, and suggesting a security investment to company leadership.

    You have:

    • 6+ years of hands-on IT systems administration or IT operations experience
    • Experience owning IT for a small or mid-sized organization
    • Strong Google Workspace or Microsoft 365 administration experience
    • Experience managing Windows and macOS devices through an MDM platform
    • Working knowledge of Linux and experience supporting technical users
    • Strong networking knowledge, including DNS, DHCP, VLANs, VPNs, Wi-Fi, and firewalls
    • Experience with identity management, SSO, MFA, access controls, and employee lifecycle management
    • Practical knowledge of endpoint security, patching, backups, logging, and incident response
    • Experience building repeatable support, onboarding, offboarding, purchasing, and inventory processes
    • Experience with ticketing, asset-management, or IT service-management systems
    • Strong troubleshooting skills and sound judgment around security, reliability, cost, and usability
    • Clear communication skills and a service-oriented approach
    • Comfort providing hands-on support in an engineering and manufacturing environment

    Due to export control requirements applicable to this position, we are only able to consider U.S. persons, as defined by U.S. export control laws. This includes U.S. citizens, lawful permanent residents, and individuals granted asylee or refugee status.

    It's helpful, though not essential, if you have:

    • Experience supporting engineering, robotics, aerospace, defense, or manufacturing organizations
    • Familiarity with NIST 800-171, CMMC, SOC 2, ISO 27001, or similar frameworks
    • Experience handling export-controlled, customer-sensitive, or government information
    • Experience managing cloud infrastructure and on-premises servers
    • Familiarity with platforms such as Okta, JumpCloud, Kandji, Jamf, or Microsoft Intune
    • Scripting or automation experience with Python, PowerShell or Bash
    • Experience managing physical access, security cameras, conference rooms, or facility technology
    • Experience selecting and managing IT or security vendors

    About Seasats:

    At Seasats, we're passionate about delivering maritime robotics solutions to redefine the maritime industry. Our primary products are unmanned surface vessels (USVs), designed to carry sensors at sea for months at a time. Our USVs provide persistent monitoring and data acquisition to defense, scientific, and commercial customers, and have autonomously crossed both the Pacific and Atlantic oceans. After thousands of years in which the only way to gather information from the ocean was to put people on a boat, these uncrewed vessels are transforming how humanity monitors and interacts with the ocean. Here, you'll find the space and opportunity to do your life's best work.

    Along with your salary, you'll receive perks including:

    • Competitive insurance (including a 99% employer-covered Gold HMO plan or other options)
    • 401k matching up to 4% of salary
    • Four free lunches per week
    • An employee activity fund
    • A pet-friendly office
    • Unlimited/Flex PTO

    Hiring Notes:

    When applying, you'll be asked to provide a resume and answer a few screening questions.

    Please note that we are currently unable to sponsor employment visas, so candidates must be independently authorized to work in the United States.

    We appreciate diverse perspectives and life experiences, and we're committed to building a team that reflects a wide range of backgrounds. Seasats provides equal employment opportunities to all employees and applicants for employment and prohibits discrimination of any type based on race, color, religion, sex (including pregnancy, sexual orientation, or gender identity), national origin, age, disability, genetic information, marital status, protected veteran status, or any other characteristic protected under federal, state, or local law.

    We look forward to reviewing your application!

    Employment Type: FULL_TIME