Senior IT Systems Administrator

About the role

We’re hiring a full-time Senior IT Systems Administrator to serve as a senior technical contributor and operation leader within our small, hands‑on IT team. This role operates as a co‑primary technical resource alongside the IT Director, providing ownership of critical systems and acting as a backup/escalation point for engineering and security operations. The position is ideal for a highly capable administrator who is comfortable being a technical leader and playing a key role in security, compliance (CMMC), infrastructure modernization and managing multiple important systems. You’ll help shape the company’s cybersecurity posture, drive operational stability, and support cloud migration efforts in a dynamic and growing industry‑sector environment.

Why Join Us?

• Collaborate directly with the IT Director in a mentoring, high‑impact environment.
• Work on a range of initiatives from legacy modernization to cloud implementation.
• Play a key role in strengthening operational IT security in the industrial sector.
• Join a rapidly growing company that values technical expertise, ownership, and practical results.

Responsibilities

• Own the patching and vulnerability management lifecycle across Windows, Linux, and Mac environments, including operating vulnerability scans, prioritizing and remediating vulnerabilities via cloud (Intune) and local network tools, and reporting to the Director of IT.
• Lead technical efforts for CMMC Level 2 compliance (security & compliance), supporting documentation, policy updates, audit readiness, and ongoing compliance tasks.
• Administer and harden Active Directory and cloud Entra identity management in alignment with CIS benchmarks.
• Configure and maintain monitoring and alerting across Windows, Linux, VMware, and Azure systems.
• Administer TrueNAS‑based file storage systems and manage ZFS‑based filesystems for redundancy.
• Perform Linux server orchestration, administration, and updates.
• Support backup/data‑protection systems and contribute to business continuity/disaster recovery plans.
• Implement and enforce a least‑privilege access model according to Zero Trust principles.
• Administer and configure reporting for file‑storage/sharing platforms such as Box, SharePoint, and Google Drive.
• Share Endpoint Detection and Response (EDR) security administration duties.
• Support Microsoft 365 and Azure administration, contributing to migration from on‑premises tools to a collaborative M365 environment.
• Apply networking knowledge to maintain Cisco switches, routers, and UniFi equipment.
• Assist with firewall administration and configuration (Cisco Firepower, Azure Firewall preferred).
• Assist with company‑wide Security Awareness Training.
• Support IP telephony and collaboration tools (Cisco, Webex, MS Teams).
• Understand NIST 800‑171 requirements and support implementation of security best practices.

Qualifications

• Bachelor’s degree in IT, Networking, Security, or related field **or** 5–8 years of equivalent experience in IT systems administration of mid‑sized environments (100+ active users, mixed Windows/Mac workstations and Windows/Linux servers).
• Proven ability to lead patching/remediation workflows independently.
• Experience with vulnerability scanners such as OpenVAS, Tenable Nessus, or similar (a plus).
• Experience supporting Active Directory, modern SSO/IdP systems, Windows and Linux servers, and endpoint security systems.
• Strong understanding of Linux systems for patching and troubleshooting.
• Knowledge of ZFS‑based NAS storage and redundancy.
• Familiarity with Microsoft 365, Azure, and hybrid cloud transition work.
• Competence with system monitoring and alerting tools (e.g., Nagios, CheckMK, or equivalents).
• Experience supporting Cisco‑based networks (routing/switching) and firewalls.
• Strong understanding of security fundamentals and practical application of NIST frameworks.
• Knowledge of industry regulations such as CMMC and experience with policy authoring/refinement.
• Solid communication skills and ability to write clear technical documentation.

Preferred Certifications

• Microsoft Azure Administrator Associate (AZ‑104) or equivalent experience.
• CompTIA Security+, Linux+, optionally Network+.
• Cisco CCNA or demonstrated hands‑on network support.
• VMware VCP or prior experience with ESXi or other hypervisors.
• (ISC)² SSCP, CISSP interest.

Other Requirements

• Reliable transportation.
• Ability to pass a pre‑employment drug screen and background check for potential CUI access.
• Safety: adherence to SCI’s safety policies and safe work practices, even in hazardous environments.
• Appearance: business‑casual or better attire may be required for customer‑facing interactions.
• Physical: ability to lift equipment up to 40 lb, and perform bending, squatting, kneeling, stooping, or crouching as needed.