Senior IT Systems Administrator

Standard Calibrations Inc-posted 7 days ago
Full-time • Mid Level
Chesapeake, VA
101-250 employees
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We’re hiring a full-time Senior IT Systems Administrator to support and secure our IT infrastructure in a hands-on role that will work closely with the Director of IT. This position is ideal for someone eager to take ownership of key systems and processes — especially in patching, vulnerability management, storage and Linux administration, and Active Directory — while collaborating with a technical leader across multiple domains. 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.

  • Own the full vulnerability management lifecycle across Windows, Linux, and Mac environments. This includes operating vulnerability scans, prioritizing and remediating vulnerabilities, and submitting reports to the Director of IT.
  • Administer and harden Active Directory 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 and Google Drive.
  • Share Endpoint Detection and Response administration duties.
  • Support Microsoft 365 and Azure administration.
  • Contribute to the upcoming migration from an on-premises mail system to Exchange Online.
  • Participate in migrating from local Active Directory to a hybrid Entra/Azure AD environment.
  • Apply working knowledge of networking principles to support Cisco switches and routers.
  • Administer or assist with firewall configurations (Cisco Firepower preferred).
  • Assist with the company-wide Security Awareness Training program.
  • Assist with supporting Cisco Call Manager telephony and Webex collaboration.
  • Understand NIST 800-171 requirements and support implementation of security best practices; familiarity with CMMC is a plus.
  • Participate in authoring IT policy documentation and technical procedures.
  • Bachelor’s degree in IT, Networking, Security, or related field along with 5–7 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 or Nessus.
  • Experience supporting Active Directory, Modern SSO and identity systems, Windows and Linux servers, and endpoint security systems.
  • Understanding of Linux systems in support of patching and troubleshooting.
  • Understanding of TrueNAS and zfs-based filesystems for NAS
  • Familiarity with M365, Azure, and hybrid cloud transition work.
  • Competence in system monitoring and alerting tools (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.
  • Solid communication skills and ability to write clear technical documentation.
  • Must have reliable transportation.
  • Must be able to pass a pre-employment drug screen.
  • Ability to lift equipment weighing up to 40 pounds (with equipment, as needed)
  • Bending/squatting/kneeling/stooping/crouching
  • Microsoft: AZ-104 (Azure Administrator Associate) or equivalent experience
  • CompTIA: Security+ or Linux+, optionally Network+
  • Cisco: CCNA or evidence of hands-on network support
  • VMware: VCP or prior experience with ESXi environments and/or other hypervisors
  • ISC2: SSCP, CISSP interest
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