Systems Administrator

As an early member of Antares IT operations function, you will support the infrastructure required for software, engineering, manufacturing, and business teams to move quickly and securely. You will work hands-on across endpoints, identity and access management, network infrastructure, collaboration tools, conference rooms, cloud services, and internal applications while helping maintain the reliability and security expected in a regulated, government-facing environment.

The ideal candidate is a technically versatile junior systems administrator who can troubleshoot quickly, document clearly, and balance operational rigor with speed. This person will be comfortable supporting both technical and non-technical users, working onsite with engineering and manufacturing teams, and improving repeatable processes as Antares scales.

Roles & Responsibilities:

• Provision, configure, and manage user accounts, endpoints, groups, licenses, and access controls across enterprise systems.

• Administer and maintain the Microsoft 365 environment, including Entra ID, Intune, Defender, Exchange, Teams, SharePoint, and related admin workflows.

• Deploy, configure, maintain, patch, and decommission Windows and macOS endpoints; support Linux systems and engineering workstations as needed.

• Support day-to-day IT operations by troubleshooting workstations, peripherals, servers, identity issues, VPN connectivity, conference rooms, and network incidents.

• Maintain and troubleshoot network infrastructure, including LAN/WAN, WiFi, VPN, DNS, DHCP, routing, VLANs, switching, cabling, and port-security/NAC concepts.

• Configure and support collaboration and conference-room technologies, including Microsoft Teams, Zoom, displays, cameras, audio systems, and room scheduling equipment.

• Manage endpoint lifecycle processes including imaging, enrollment, device preparation, patching, updates, inventory, asset tracking, and secure disposal.

• Administer endpoint protection, security certificates, encryption, device compliance policies, and patch management processes.

• Deploy, maintain, and secure in-house and cloud applications used by engineering, operations, manufacturing, and business teams.

• Deploy and maintain PSA/RMM, ticketing, monitoring, automation, and remote-management tools to improve visibility and response times.

• Document IT procedures, configurations, access decisions, support runbooks, and recurring workflows in a way that supports compliance and audit readiness.

• Assist with regulatory and customer compliance efforts, including logging, reporting, evidence collection, access reviews, and audit preparation.

• Support IT operations in manufacturing, lab, shop-floor, or regulated environments, partnering with engineering, facilities, security, and operations as needed.

• 2+ years of hands-on IT support, systems administration, endpoint administration, or equivalent technical experience.

• Working knowledge of Microsoft 365 administration, including Entra ID/Azure AD, Intune, Defender, device enrollment, user lifecycle management, and access controls.

Preferred Skills and Experience:

• Experience supporting and troubleshooting Windows and macOS endpoints in a business environment.

• Solid networking fundamentals, including TCP/IP, DNS, DHCP, routing, VLANs, VPN, WiFi, switching, and basic firewall concepts.

• Proficiency with PowerShell or similar scripting/automation concepts, plus comfort using command-line diagnostic tools.

• Demonstrated troubleshooting ability across workstations, peripherals, collaboration tools, network connectivity, identity, and business applications.

• Strong documentation habits and attention to compliance, configuration accuracy, and repeatable process execution.

• Experience with GCC High, defense, government-contracting, export-controlled, or other compliance-driven IT environments.

• Experience with Linux systems, Azure and/or AWS virtualization, and cloud-hosted infrastructure or applications.

• Hands-on experience with Ubiquiti/UniFi or similar switches, firewalls, wireless access points, cameras, physical access controls, and management applications.

• Experience with copper and fiber switching infrastructure, wireless deployment/tuning, NAC, port security, encryption protocols, keys, and certificates.

• Experience with ticketing, PSA, RMM, monitoring, patch-management, vulnerability-management, or endpoint-management platforms.

• Experience supporting manufacturing facilities, labs, engineering teams, or mixed office/shop-floor environments.

• CompTIA A+, Network+, Security+, Microsoft 365/Endpoint Administrator, Azure, or equivalent certifications are a plus but not required.

Additional Requirements:

• Ability to work long hours and weekends as necessary to support critical milestones, outages, hardware moves, onboarding surges, audits, or facility needs.

At Antares, our long-term mission is to make clean energy abundant from Earth to the Asteroid Belt. We’re fueled by the belief that advanced nuclear energy can strengthen our military, solve the climate crisis, elevate global living standards, and expand humanity’s presence in outer space. To achieve our mission, we’re building mass-producible, inherently safe, deployable microreactors that can be used terrestrially, underwater, and in space.

Formed in 2023, the Antares team hails from SpaceX, The White House, MIT, Rigetti Computing, The Air Force, General Atomics, Relativity Space, Ursa Major, and National Laboratories like Los Alamos, Idaho, and Oak Ridge. Antares has raised over $130M in venture capital from top-tier investors and has over $13M in government funding., At Antares, we like to specifically tie each role to our founding document’s set of values-here are the top five cultural values we think you should believe at your core to be successful:

• Think in Systems - Energy and Defense are complex ecosystems with numerous stakeholders with competing priorities, conflicting policies, perverse incentives, and emergent and path-dependent properties. First principles thinking alone is insufficient. Think probabilistically and then take action. “If you want to be certain, then you are apt to be obsolete.” Over-optimizing the components often degrades the system
• Obsess over the End User - The customer and end user are often not the same. We will never build globally competitive commercial products if we lose sight of our end users and their entire interaction with the product life cycle
• Be Unconstrained by Convention - Our only limits are the laws of physics. Many, even experts, will say what we are working on is impossible. They said the same about SpaceX reusing rockets. Generationally impactful companies, by definition, must accomplish the seemingly impossible. If it were easy, it would have already been done. Never shy away from a solution because it has never been tried before, and never choose to do something because that’s “how it’s always been done”
• Go Where the Work Is - Never miss a chance to meet a customer, user, or stakeholder face to face, even if that means hopping on a plane. If you can’t make it, find a teammate who can channel your intentions and go in your place. Deep work can be done from anywhere, but we believe teams are built in person, and aim to maximize our time together
• Operate in the Grey - Embrace nuance in pursuit of truth. Question every fundamental assumption