Senior Systems Administrator

World view; Tucson (AZ); On-site; USD 90,000 - 110,000; Full time

Job summary

Ondas Sentinel in Tucson, AZ, seeks a Senior Systems Administrator to own the design, security, and reliability of core enterprise systems both on‑premises and in the cloud. This hands‑on role supports IAM platforms, endpoint management, backup and recovery, and operates in a regulated environment with emphasis on operational excellence.

The Senior Systems Administrator collaborates with Infrastructure, Security, Network, and Application teams, reports to IT leadership, and may travel to other

Qualifications

• Minimum 5 years of experience in systems administration/infrastructure engineering.
• Strong hands‑on experience with Windows Server administration, Microsoft 365 and Entra ID, AD/GP, IAM, and backup/recovery solutions.
• Experience implementing least‑privilege access models and privileged account management.
• Proven ability to troubleshoot complex infrastructure issues across multiple technologies.
• Excellent documentation and cross‑team collaboration skills.
• U.S. Citizenship required.

Responsibilities

• Administer and maintain core infrastructure platforms including Windows Server, virtualization, storage, and backups.
• Manage Microsoft 365 and Entra ID, including identity lifecycle, Conditional Access, MFA, and privileged access controls.
• Deploy and harden endpoint environments using Intune, Group Policy, and endpoint security solutions.
• Design, implement, and test backup, disaster recovery, and business continuity capabilities.
• Lead vulnerability remediation, patching, and security hardening across servers and endpoints.
• Support incident response, containment, recovery, and post‑incident activities.
• Develop runbooks, diagrams, and configuration standards; maintain asset inventories.
• Lead modernization initiatives including cloud adoption and platform upgrades.
• Provide technical guidance to junior admins; collaborate with vendors/ MSPs.

Skills

Windows Server

Microsoft 365 / Entra ID

Active Directory / Group Policy

Documentation

Communication

US Citizenship

PowerShell

VMware/Hyper-V

Tools

PowerShell

VMware

Hyper-V

Job description

$90,000 - $110,000 a year

Senior Systems Administrator

Tucson, AZ

Company Overview

Ondas 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.

Ondas Sentinel is Ondas’ U.S.based defense division, purpose-built to deliver U.S.made, U.S. delivered capabilities for the Department of Defense and allied ministries of defense. The division brings together advanced autonomous systems, mission technologies, and intelligence solutions that help customers create persistent awareness, operate with confidence, and make faster decisions in complex and contested environments.

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. Few companies in the world can do this work at operational scale. That means our teams are not simply maintaining existing systems; they are building new capabilities, solving first-of-their-kind challenges, and helping define what persistent

Job Description

The 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.

This is a hands‑on technical role, not a people‑management position. 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 Responsibilities

• Administer 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; regularly test and validate recovery procedures.
• Perform system patching, vulnerability remediation, and security hardening across server and endpoint environments.
• 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.
• Collaboraôte with vendors and managed service providers to support operational and project‑related objectives.

Required Qualifications

• Minimum of 5 years of experience in systems administration, infrastructure engineering, or a related technical discipline.
• 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.
• Proven ability to troubleshoot and resolve complex infrastructure issues across multiple technologies.
• Strong documentation, organizational, and operational discipline.
• Excellent communication and collaboration skills.
• U.S. Citizenship required.

Preferred Qualifications

• Experience supporting regulated, government, aerospace, defense, or security‑focused environments.
• Familiarity with infrastructure controls supporting NIST 800‑171, CMMC, DFARS, SOX, or similar compliance frameworks.
• Experience with Conditional Access, Privileged Identity Management, Just‑in‑Time access, and identity governance solutions.
• Experience managing hybrid environments spanning on‑premises and Microsoft Azure workloads.
• Experience supporting incident response, forensic preservation, and recovery operations.
• PowerShell scripting and infrastructure automation experience.
• Microsoft certifications such as Azure Administrator, Microsoft 365 Administrator, Security Administrator, or related credentials.
• Experience with virtualization platforms such as VMware or Hyper‑V.

What We Offer

As 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.

We believe in creating a dynamic and inclusive workplace where creativity thrives, and every voice is heard. Our commitment to all team members is built upon five core cultural pillars: Engage, Lean In, Create, Care, and Own. Together, these pillars form the foundation of our employee experience while adhering to the highest standards of ethical and sustainable practices.

Some Final Notes

The description gives you a sense of what the position involves, but is not an exhaustive list. We are a growing and evolving team, which means your responsibilities may shift or expand over time as new opportunities arise. Flexibility and curiosity are part of what make our work exciting!

Equal Opportunity Employer

At Ondas Sentinel, we are proud to be an equal opportunity employer. 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.