Top 19 Senior it administrator Jobs in El Segundo, Ca

Senior IT Administrator
CesiumAstro —El Segundo, CA
- $99,000 - $117,000 a year
- Full-time
- Computer science
- Microsoft Outlook
- Computer Science
- Health savings account
- Health insurance
Senior System Administrator - Information Technology
Memorial Hospital of Gardena —Gardena, CA
- $83,428.80 - $122,636.80 a year
- Computer science
- Computer Science
- 5 years
Quick Apply
Senior IT Support Engineer
JM Eagle —Los Angeles, CA
- $130,000 - $145,000 a year
- 5 years
- Windows
- Continuous improvement
Quick Apply
1d
Sr. IT Systems Administrator, IT Applications
SpaceX —Hawthorne, CA
- $95,000 - $150,000 a year
- Email
- Computer Science
- 3 years
- SQL
- Paid parental leave
- Employee stock purchase plan
Senior Systems Administrator
Tecolote Research, Inc. —El Segundo, CA
- $65,000 - $85,000 a year
- Full-time
- Mid-level
- Office
- Windows
- Paid jury duty
- AD&D insurance
Senior IT System Administrator
Vast —Long Beach, CA
- $107,010 - $156,000 a year
- Weekends as needed
- System design
- Office
- Senior level
- Paid parental leave
- Disability insurance
Senior Cloud Administrator
SECURITY INDUSTRY SPECIALISTS INC —Culver City, CA
- $135,000 a year
- Full-time
- Google Workspace
- 7 years
- Computer Science
- Dental insurance
- 401(k)
Quick Apply
Senior System Administrator
Boeing —Seal Beach, CA
- $146,200 - $197,800 a year
- Computer Science
- 5 years
- Bachelor of Science
- Health savings account
- Disability insurance
Senior Network Administrator (Systems)- Hybrid
Northrop Grumman Federal Credi —Gardena, CA
- $90,000 - $125,000 a year
- Full-time
- Computer science
- 7 years
- Computer Science
- Profit sharing
- Disability insurance
Quick Apply
14d
Senior Systems Administrator
IJW Whiskey Company —Beverly Hills, CA
- $160,000 a year
- Full-time
- Computer Science
- Analysis skills
- Bachelor's degree
Quick Apply
3d
Systems Engineer, Senior - Engemann Admin Student Health - Full Time 8 Hour Days (Exempt) (Non-Union)
USC —Los Angeles, CA
- $99,507 - $164,559 a year
- 8 hour shift
- 7 years
- Computer Science
- Customer service
13d
Senior Systems Administrator/ Patch Manager
Koniag Government Services —Carson, CA
- Full-time
- Senior level
- Commercial
- Paid holidays
- Health insurance
Principal Linux Systems Administrator / Sr. Principal Linux Systems Administrator (AHT)
Northrop Grumman —Redondo Beach, CA
- $103,600 - $193,900 a year
- Overtime
- Computer science
- Computer Science
- 5 years
- Paid holidays
- Disability insurance
Senior Application Administrator
Commonwealth Business Bank —Los Angeles, CA
- $85,000 - $130,000 a year
- Full-time
- Computer science
- Computer Science
- English
- Paid holidays
- Health insurance
Quick Apply
Sr. Network Administrator
Softnet Ventures —Los Angeles, CA
- Rotating shift
- 7 years
- Computer Science
- Writing skills
Sr Administrator (Support & Operations)
HCLTech —Los Angeles, CA
- From $75,000 a year
- Senior level
7d
Systems Engineer, Senior - Engemann Admin Student Health - Full Time 8 Hour Days (Exempt) (Non-Union)
Keck Medical Center of USC —Los Angeles, CA
- $99,507 - $164,559 a year
- 8 hour shift
- Background check
- 7 years
- Computer Science
14d
Senior System Administrator (Temp)
Panda Restaurant Group —Rosemead, CA
- $43.26 - $66.82 an hour
- Temporary
- Hybrid work
- Hospitality
- ERP systems
- Office
- AD&D insurance
- Disability insurance
Quick Apply

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Senior System Administrator - Information Technology
Memorial Hospital of Gardena —Gardena, CA
Proficiency in the design, implementation, and maintenance of SD-WAN and hybrid cloud environments. Treats everyone as their customer; utilizes scripting and…
$83,428.80 - $122,636.80 a year
Quick Apply
Senior Technology Specialist (Promotional)
City of Manhattan Beach, CA —Manhattan Beach, CA
A valid California driver’s license is required at time of appointment. Computers and peripheral equipment including operating systems and basic operations…
$104,568 - $133,488 a year
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Degree in computer science, Information Technology, Healthcare Administration, or a related field. The Senior Systems Analyst will play a crucial role in the…
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Senior IT Administrator

CesiumAstro -
El Segundo, CA

Apply Now

Job Details

Full-time
$99,000 - $117,000 a year

Benefits

Stock options
Health savings account
Health insurance
Dental insurance
Flexible spending account
Vision insurance
Retirement plan

Qualifications

Endpoint Security
Cloud identity and access management (IAM)
Content creation for technical audiences
Microsoft Outlook
IT user and group management
GPO
Server troubleshooting
Configuration management
Public Cloud
AWS
Cloud service support
Computer hardware
Desktop (troubleshooting support)
Remote access management
Remote access software
Azure AD
Customer support ticket management
Networking equipment (troubleshooting support)
Microsoft Teams
SharePoint
MFA
Microsoft 365 support
Access control management
VPN management
Network infrastructure management
Desktop administration
Standard operating procedures (SOPs)
IT department experience
Ticketing system technical support
Standard operating procedures drafting

Full Job Description

Please Note: To conform with the United States Government Space Technology Export Regulations, the applicant must be a U.S. citizen, lawful permanent resident of the U.S., conditional resident, asylee or refugee (protected individuals as defined by 8 U.S.C. 1324b(a)(3)), or eligible to obtain the required authorizations from the U.S. Department of State.

At CesiumAstro, we are developers and pioneers of out-of-the-box communication systems for satellites, UAVs, launch vehicles, and other space and airborne platforms. We take pride in our dynamic and cross-functional work environment, which allows us to learn, develop, and engage across our organization. If you are looking for hands-on, interactive, and autonomous work, CesiumAstro is the place for you. We are actively seeking passionate, collaborative, energetic, and forward-thinking individuals to join our team.

We are looking to add a Senior Information Technology (IT) Administrator to our team. This role is a project-focused role responsible for planning and executing enterprise IT initiatives at CesiumAstro. In this position, you will own the delivery of system migrations, integrations, companywide upgrades, and new application rollouts that support a growing aerospace and defense organization. The Senior IT Administrator operates with general supervision and exercises independent judgment in diagnosing, prioritizing, and resolving a wide range of technical issues affecting end users and enterprise systems.

JOB DUTIES AND RESPONSIBILITIES

Lead and execute system migration projects including planning, testing, cutover, and post-migration support.
Drive system integrations across enterprise platforms to improve interoperability and reduce manual workflows.
Coordinate and implement companywide software and hardware upgrades with minimal disruption to operations.
Manage Active Directory cleanup efforts including account audits, group policy reviews, and directory hygiene.
Plan and execute new application rollouts including stakeholder coordination, testing, and end user enablement.
Administer and maintain user accounts, groups, and permissions in Active Directory and/or Azure AD/Entra ID.
Manage endpoint configuration, imaging, patching, and software deployment via MDM platforms (e.g., Intune).
Monitor system health and assist in administration of servers, cloud environments, network infrastructure, M365 advanced skills, including Purview, Security, and Entra ID.
Support IT security practices including access reviews, MFA enforcement, and endpoint compliance.
Mentor junior helpdesk staff and provide guidance on escalated technical issues.
Develop and maintain technical documentation including SOPs, knowledge base articles, and troubleshooting guides.
Identify recurring issues, contribute to root-cause analysis, and implement process improvements.
Participate in IT projects including system migrations, office expansions, and tool evaluations.

JOB REQUIREMENTS AND MINIMUM QUALIFICATIONS

5–8 years of IT support or systems administration experience required (3–6 years with a relevant M.S.).
B.S. in Information Technology, Computer Science, or related field preferred; equivalent experience considered.
Complete understanding and wide application of IT support and systems administration principles.
Advanced troubleshooting skills across hardware, software, networking, and cloud-connected environments.
Working knowledge of IT security practices including endpoint compliance, access management, and MFA.
Ability to develop technical documentation and SOPs to support knowledge sharing and process consistency.
Proficiency in Microsoft 365 (Outlook, Teams, SharePoint, OneDrive).
Experience with AWS cloud configuration and support.
Expertise in Active Directory Azure AD/Entra ID, and VPN and remote access tools..
Knowledge of IT ticketing systems.
Strong oral and written communication skills.
Solid troubleshooting and problem-solving skills.
Strong customer service orientation.

PREFERRED EXPERIENCE

Experience in a manufacturing, aerospace, or defense environment.
CompTIA A+, Network+, Security+, Microsoft 365 Certified, or ITIL Foundation.
Familiarity with ITAR/export compliance requirements in an IT context.

CesiumAstro considers several factors when extending an offer, including but not limited to, the role and associated responsibilities, a candidate’s work experience, education/training, and key skills. Full-time employment offers include company stock options and a generous benefits package including health, dental, vision, HSA, FSA, life, disability and retirement plans.

CesiumAstro is an Equal Opportunity employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, national origin, disability, protected Veteran Status, or any other characteristic protected by applicable federal, state, or local law.

Please note: CesiumAstro does not accept unsolicited resumes from contract agencies or search firms. Any unsolicited resumes submitted to our website or to CesiumAstro team members will be considered property of CesiumAstro, and we will not be obligated to pay any referral fees.

We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses and identifying potential inconsistencies or verification signals in application materials based on available information. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.

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Refine Your Search

senior it administrator jobs in el segundo, ca

Senior IT Administrator

Senior System Administrator - Information Technology

Senior IT Support Engineer

Sr. IT Systems Administrator, IT Applications

Senior Systems Administrator

Senior IT System Administrator

Senior Cloud Administrator

Senior System Administrator

Senior Network Administrator (Systems)- Hybrid

Senior Systems Administrator

Systems Engineer, Senior - Engemann Admin Student Health - Full Time 8 Hour Days (Exempt) (Non-Union)

Senior Systems Administrator/ Patch Manager

Principal Linux Systems Administrator / Sr. Principal Linux Systems Administrator (AHT)

Senior Application Administrator

Sr. Network Administrator

Sr Administrator (Support & Operations)

Systems Engineer, Senior - Engemann Admin Student Health - Full Time 8 Hour Days (Exempt) (Non-Union)

Senior System Administrator (Temp)

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