IT SysAdmin

ONDS) is building a new kind of intelligence company, one designed for a world where speed, autonomy, and decision advantage matter more than ever. By combining multi-domain platforms, advanced sensing, secure networks, and AI-enabled analytics, Ondas helps defense, government, and critical infrastructure customers transform complex mission data into decision-ready insights when and where they matter most.The Stratospheric ISR business unit within Ondas Sentinel is focused on one of the most unique mission areas in aerospace and defense: manufacturing and operating high-altitude stratospheric balloon systems. they are building new capabilities, solving first-of-their-kind challenges, and helping define what persistent.Job DescriptionThe Senior Systems Administrator serves as a senior technical leader within the IT Infrastructure team. This role is responsible for the design, administration, security, and reliability of core enterprise systems, including on-premises and cloud infrastructure, identity and access management platforms, endpoint management solutions, and backup and recovery services. The Senior Systems Administrator works closely with Infrastructure, Security, Network, and Application teams to ensure systems remain secure, scalable, resilient, and aligned with business objectives. The role operates within a regulated environment and supports compliance initiatives through effective system administration, security controls, documentation, and operational excellence. This role is based on-site in Tucson, Arizona and requires regular engagement with IT, Security, Infrastructure, Network, Application, and business teams. Travel may be required to support other company locations, vendors, audits, or operational readiness activities.Key ResponsibilitiesAdminister and maintain core infrastructure platforms, including Windows Server, virtualization environments, storage systems, and backup solutions.Manage and secure Microsoft 365 and Microsoft Entra ID, including identity lifecycle management, Conditional Access, MFA, and privileged access controls.Deploy, manage, and harden endpoint environments using Microsoft Intune, Group Policy, and endpoint security solutions.Design, implement, and maintain backup, disaster recovery, and business continuity capabilities; Support system-level incident response, containment, recovery, and post-incident remediation activities.Develop and maintain system documentation, runbooks, diagrams, configuration standards, and asset inventories.Lead infrastructure modernization initiatives, including cloud adoption, platform upgrades, and technology lifecycle management.Provide technical guidance and mentorship to junior administrators and support personnel.Collaborate with vendors and managed service providers to support operational and project-related objectives.Strong hands-on experience with Windows Server administration, Microsoft 365 and Microsoft Entra ID, Active Directory and Group Policy, identity and access management, and backup and disaster recovery solutions.Experience implementing least-privilege access models, privileged account management, and secure system configurations.What We OfferAs Senior Systems Administrator, you will help strengthen the core technology foundation that supports Ondas Sentinel's mission, ensuring the systems our teams rely on are secure, resilient, scalable, and ready for growth. You will work side by side with experts in emerging technology, gaining exposure to cutting edge ideas and projects that are shaping the future. We offer a comprehensive benefits package including Medical, Dental, Vision, and Life Insurance because we believe in taking care of the you as a person, not just a team member. Our Tucson workplace is designed to support collaboration, focus, and well-being, with an on-site environment that keeps IT, security, infrastructure, engineering, manufacturing, quality, and program teams closely connected to the mission. Together, these pillars form the foundation of our employee experience while adhering to the highest standards of ethical and sustainable practices.We are a growing and evolving team, which means your responsibilities may shift or expand over time as new opportunities arise. We celebrate belonging and diversity and are committed to creating an inclusive environment for all team members. We welcome applications from every background and life experience because we know our differences make us stronger.