Network, Systems & Cybersecurity Administrator

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1 Position Available

The Network, Systems & Cybersecurity Administrator is a full-time, hands‑on role supporting secure, reliable enterprise IT services for a U.S. Aerospace and Defense contractor operating in regulated federal environments. The position supports administration, maintenance, troubleshooting, and continuous improvement across enterprise networks, Windows, macOS, and Linux systems, cloud services, identity and access management, endpoint management, virtualization, backup and recovery, collaboration platforms, and cybersecurity controls.

Responsibilities include configuring and supporting network and security technologies; administering Microsoft 365, Azure, Entra , Active Directory, Intune, and related services; supporting Windows and Apple endpoints; automating routine administration with Power Shell or comparable tools; managing system lifecycle, patching, vulnerability remediation, logging and monitoring; assisting with incident response and disaster recovery; and providing responsive technical support to staff across multiple locations.

The successful candidate will understand how security requirements influence day‑to‑day IT operations in the Defense Industrial Base. This includes practical knowledge of NIST SP 800-171 security requirements and controls applicable to protecting Controlled Unclassified Information (CUI) and supporting Cybersecurity Maturity Model Certification (CMMC) compliance, along with familiarity with relevant FAR and DFARS cybersecurity obligations. The role requires sound judgment, disciplined documentation, secure configuration practices, and the ability to balance operational requirements with cybersecurity and compliance objectives.

Candidates should be comfortable taking ownership, working independently and collaboratively, adapting to changing priorities and technologies, and supporting projects or incidents outside normal business hours when required.

As a member of our highly valued staff, you will work with modern enterprise technologies, have access to training and professional development opportunities, and contribute directly to the security, reliability, and continued growth of ES3’s IT environment.

This full‑time position is primarily onsite at ES3’s Utah operations. Qualified candidates located in Georgia may also be considered based on business needs and their ability to support the role effectively. The position supports staff and systems across multiple company locations and may require periodic travel, planned after‑hours maintenance, and response to time‑sensitive operational or cybersecurity events. The role works closely with technical staff, management, vendors, and other stakeholders in a collaborative, security‑conscious environment.

• 7+ years of current, directly relevant professional experience administering and supporting enterprise IT infrastructure, networks, systems, or cybersecurity in a production environment
• Windows Server, Windows desktop, and macOS endpoint administration;
  Microsoft 365…