Senior IT Administrator

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 Cesium Astro
, 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, Cesium Astro 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  this position, you will own the delivery of system migrations, integrations, company wide 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.

• 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 company wide 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 .
• 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 .
• 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.

• 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, One Drive).
• Experience with AWS cloud configuration and support.
• Expertise in Active Directory Azure AD/Entra , 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.

• 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…