Senior IT Systems Administrator

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. This 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.

• 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.

• Own the patching and vulnerability management lifecycle across Windows, Linux, and Mac environments. This includes operating vulnerability scans, prioritizing and remediating vulnerabilities via cloud (InTune) and local network tools, and submitting reports to the Director of IT.
• Security & Compliance (CMMC / NIST 800-171 focus) – play a lead technical role in CMMC level 2 compliance efforts. Support documentation, policy updates and implementation, 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.
• Perform Linux server orchestration, administration and updates.
• Support backup / data protection systems and contribute to business continuity/disaster recovery plans.
• Contribute to implementation and enforcement of a least-privilege access model across systems according to Zero Trust principles.
• Assist with secure data handling procedures, administer and configure reporting for file storage/sharing platforms such as Box, Sharepoint and Google Drive.
• Share Endpoint Detection and Response security administration duties.
• Support Microsoft 365 and Azure administration.
• Contribute to the ongoing migration from on-premises tools to a fully collaborative M365 environment.
• Apply working knowledge of networking principles in maintaining Cisco switches and routers and Uni Fi equipment.
• Assist with firewall administration and configuration (Cisco Firepower, Azure Firewall preferred).
• Assist with the company-wide Security Awareness Training.
• Assist with supporting IP telephony and collaboration tools (Cisco, Webex, MS Teams)
• Understand NIST 800-171 requirements and support implementation of security best practices; familiarity with CMMC is a plus.

• Bachelor’s degree in IT, Networking, Security, or related field along with 5–8 years of experience (or equivalent related experience in lieu of a degree) in IT systems administration of mid-sized environments. A mid-sized environment in our case refers to over 100 active users and a heterogeneous mix of Windows and Mac workstations as well as Windows and Linux servers.
• Proven ability to lead patching/remediation workflows independently. Experience with scanners such as OpenVAS, Tenable Nessus or similar is a plus.
• Experience supporting Active Directory, Modern SSO and IdP systems, Windows and Linux servers, and endpoint security systems.
• Understanding of Linux systems in support of patching…