Senior Systems Administrator
Core
Own the reliability, security, and performance of on-premises, virtualized, and cloud infrastructure for critical applications.
Role type
Senior Systems Administrator (Infrastructure)
Builds
Virtualized and hyperconverged infrastructure, identity management systems, and disaster recovery capabilities.
Domain
IT Infrastructure, Cloud Computing, Virtualization
Deliverable
infrastructure
Required skills
Windows Server administration, Linux administration, Virtualization (VMware, Hyper-V, KVM), Cloud platforms (AWS, Azure, GCP), Identity management (Active Directory, Entra ID), Scripting (PowerShell, Bash, Python), Networking fundamentals, Backup and disaster recovery planning, Incident response, Infrastructure automation.
Preferred skills
Mentoring junior administrators, Leading infrastructure projects, Root-cause analysis, Compliance and security hardening.
Technologies
AWS, Active Directory, Azure, Bash, Cloud, GCP, Hyper-V, KVM, Linux, PowerShell, Python, RHEL, Ubuntu, VMware, Windows
Responsibilities
Administer, patch, and maintain Windows and Linux servers across on-premises, virtualized, and cloud environments; Manage virtualization and hyperconverged infrastructure including capacity planning and lifecycle upgrades; Oversee identity and access management across Active Directory, Entra ID/Azure AD, SSO, and MFA; Design and maintain backup, disaster recovery, and business continuity plans; Monitor system health, respond to incidents, and lead root-cause analyses; Automate repetitive tasks and configurations using PowerShell, Bash, Python, or infrastructure-as-code tools; Partner with Security on vulnerability remediation, system hardening, and compliance; Lead infrastructure projects including migrations and platform upgrades; Mentor junior administrators and act as the IT team's senior escalation point; Participate in a shared on-call rotation and occasional after-hours maintenance windows.