Senior IT Administrator

CesiumAstro; Denver (CO); On-site; USD 94,000 - 112,000; Full time

Benefits offered by this job

Stock options

Benefits package

Job summary

CesiumAstro in Denver, CO is seeking a Senior IT Administrator to own enterprise IT initiatives, migrations, and upgrades. You will manage AD/Azure AD, MDM, and cloud services while coordinating with stakeholders and mentoring junior staff.

The role requires 5–8 years of IT experience, BS in IT/CS, strong security practices, and hands-on expertise with Microsoft 365, AWS, and VPNs. This is a full-time, on-site position offering stock options and a comprehensive benefits package.

Qualifications

• 5–8 years of IT support or systems administration experience.
• BS in IT, CS, or related field preferred; equivalent experience considered.
• Strong understanding of IT support and systems administration principles.
• Advanced troubleshooting across hardware, software, networking and cloud.

Responsibilities

• Lead and execute system migrations including planning, testing, and post‑migration support.
• Drive system integrations across enterprise platforms to improve interoperability.
• Coordinate and implement company‑wide software and hardware upgrades with minimal disruption.
• Manage Active Directory cleanup, audits, and group policy reviews.
• Plan and execute new application rollouts with stakeholder coordination and testing.
• Administer user accounts and permissions in AD and Azure AD/Entra ID.
• Manage endpoint configuration, imaging, patching, and software deployment via MDM.
• Monitor system health and assist in servers, network, and cloud administration.
• Support IT security practices including MFA enforcement and endpoint compliance.
• Mentor junior helpdesk staff and develop technical documentation.
• Identify recurring issues and contribute to root‑cause analysis and improvements.
• Participate in IT projects including migrations, office expansions, and tool evaluations.

Skills

IT support

Troubleshooting

Documentation

Customer service

Communication skills

Education

BS in Information Technology, Computer Science, or related field

Tools

AWS

Microsoft 365

Azure AD/Entra ID

VPN

IT ticketing systems

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, 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.

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 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 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.

$94,000 - $112,000 a year.

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.