What are the responsibilities and job description for the Senior Systems Administrator position at Endurance IT Services?
About Us: Endurance IT Services provides Managed IT Services, Cybersecurity Solutions, and IT Consulting to help businesses stay secure and productive. We also offer IT Staffing for Direct-Hire, Contract-to-Hire, and Contract roles, plus internal full-time positions.
*Some opportunities may not be exclusive and can change as we work with clients—but our goal is always to help candidates find the right job.
Position
Overview – Senior IT Systems Administrator
We’re hiring a 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.
Key
Responsibilities
- 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.
Qualifications
& Experience
- 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 in
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 file systems
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.
Preferred
Certifications
(None required, but a plus —
especially if already held or actively being pursued.)
- 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
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
security in the industrial sector.
- Join a rapidly growing company that values
technical expertise, ownership, and practical results.
Salary : $100 - $120