Senior IT Administrator

CesiumAstro•Melbourne, FL

About The Position

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.

Requirements

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.

Nice To Haves

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.

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.