IT Systems Administrator

IT Systems Administrator
The Role
Own the reliability, security, and continuous improvement of Crest Operations’ hybrid IT environment. You will administer core infrastructure, solve complex technical problems, automate repetitive work, and maintain the documentation and controls required for stable operations.
This role is suited to a systems expert who works independently, moves quickly, and expects technical decisions to be supported by logic, evidence, and defined standards.
What You’ll Own
Administer Windows Server, Active Directory, Group Policy, Microsoft 365, and Microsoft Entra
Maintain hybrid infrastructure across VMware, Azure IaaS, and on-premises environments
Manage identity, access, conditional-access policies, permissions, and Okta integrations
Configure endpoints, compliance policies, applications, and software deployments using Intune and Workspace ONE
Execute upgrades, patching, migrations, backups, recovery testing, and system retirements
Monitor system health, investigate alerts, and resolve root causes
Use PowerShell, APIs, and automation to improve reliability and reduce manual work
Maintain accurate system configurations, network records, procedures, and compliance documentation
Support infrastructure modernization, lifecycle planning, and platform optimization
Manage tickets, changes, and service commitments in accordance with ITIL practices
Identify security, reliability, licensing, and capacity risks before they affect the business
What Success Looks Like
Systems remain stable, secure, current, and recoverable
Technical issues are resolved accurately and at the root-cause level
Changes are tested, documented, and implemented with minimal disruption
Repetitive processes are standardized or automated
Leadership receives clear, evidence-based recommendations on risk, cost, and system improvements
Required Experience
3–7 years of systems-administration experience in a Windows enterprise environment
Strong knowledge of Windows Server, Active Directory, Group Policy, Microsoft 365, and Entra
Experience with VMware or Azure-based virtual infrastructure
Experience managing endpoints through Intune or Workspace ONE
Working knowledge of identity security, access controls, backup, recovery, and monitoring
PowerShell scripting or comparable automation experience
Ability to diagnose complex issues and make sound technical decisions independently
Strong documentation practices and attention to configuration accuracy
Preferred Experience
Okta administration and SaaS provisioning
API-based integrations and SaaS connectors
Exchange Online, SharePoint Online, Teams, Power BI, and Power Automate
Veeam, PRTG, SolarWinds, ServiceNow, or Zendesk
Infrastructure migrations, modernization, or cloud-transition projects
ITIL v4 Foundation certification
Microsoft, Azure, VMware, Okta, Network+, or Security+ certifications
Technical Environment
Windows Server 2012–2022 | Active Directory | Group Policy | Microsoft 365 | Entra | Azure IaaS | VMware vSphere | Intune | Workspace ONE | Okta | PowerShell | Veeam | PRTG | SolarWinds
Why Join Crest Operations?
You will have meaningful ownership of a diverse technical environment and the opportunity to improve how it operates. The work is hands-on, technically demanding, and visible. Strong performance can lead to senior systems administration, cloud engineering, infrastructure architecture, or IT operations leadership.