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Senior IT Administrator

CesiumAstro

Job Location:

Westminster, CA - USA

Yearly Salary: $ 107000 - 126000

Posted: 19 July 2026 (30+ days ago)

Application Deadline: 27 November 2026

Vacancies: 1 Vacancy

Job Summary

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.

AtCesiumAstro 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 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

58 years of IT support or systems administration experience required (36 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.

$107000 - $126000 a year

CesiumAstro considers several factors when extending an offer including but not limited to the role and associated responsibilities a candidates 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 torace 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.

Required Experience:

Senior IC

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