Senior System Administrator
Role Overview
The Senior System Administrator leads infrastructure design, modernization, security, and compliance across on-premises and cloud environments, with a primary focus on Microsoft Azure.
The role leads and mentors System Administrators, owns the infrastructure roadmap, and drives transition from legacy systems to secure, scalable, automated platforms.
The posting identifies 5–8 years of hands-on experience and deep expertise in Azure, Windows Server, Microsoft Entra ID, and Microsoft 365.
Key Skills for This Role
Full Job Posting
About Amphenol Communications Solutions
Amphenol Communications Solutions designs and manufactures interconnect products for communications, mobile, RF, optics, commercial electronics, data centers, networking, industrial, and other markets.
The company is part of Amphenol Corporation, a global manufacturer of electrical, electronic, and fiber-optic connectors and interconnect systems.
Role overview
The Senior System Administrator leads infrastructure design, modernization, security, and compliance across on-premises and cloud environments, with a primary focus on Microsoft Azure.
The role leads and mentors System Administrators, owns the infrastructure roadmap, and drives transition from legacy systems to secure, scalable, automated platforms.
The posting identifies 5–8 years of hands-on experience and deep expertise in Azure, Windows Server, Microsoft Entra ID, and Microsoft 365.
Team and infrastructure architecture
- Lead, mentor, and manage System Administrators; assign and prioritize work, set goals, conduct reviews, and develop team capability through coaching and training.
- Design, document, and own on-premises, hybrid, and cloud infrastructure architecture for servers, storage, identity, networking, and backup, with attention to availability, scalability, and cost.
- Architect and manage Azure landing zones, subscriptions, resource governance, VMs, virtual networks, backup, site recovery, Azure Files, monitoring, DNS, Key Vault, and policy; optimize cost and right-sizing.
Modernization, identity, and Microsoft 365
- Migrate legacy workloads to Azure, upgrade or retire end-of-life systems, adopt PaaS/SaaS where suitable, and introduce automation and infrastructure as code using PowerShell, Bicep/ARM, or Terraform.
- Oversee Active Directory, Entra ID, Group Policy, hybrid identity, Conditional Access, MFA, PIM, and modern endpoint management through Intune and Autopilot.
- Govern Exchange Online, Intune, Teams, SharePoint Online, and OneDrive to ensure secure, reliable, well-governed Microsoft 365 services.
Security and compliance
- Define and enforce infrastructure security baselines for hardening, patch and vulnerability management, Defender, SIEM monitoring, least-privilege access, and Zero Trust.
- Lead security incident and major outage response, including root-cause analysis.
- Ensure compliance with corporate policies, audit requirements such as SOX IT General Controls, and frameworks including ISO 27001, NIST CSF, and CIS Benchmarks.
- Maintain access reviews and change control, prepare audit evidence, and track remediation to closure.
Resilience, systems, and delivery
- Own backup, disaster recovery, and business continuity plans; define RTO/RPO targets and conduct regular restore and disaster recovery tests.
- Manage Hyper-V and/or VMware virtualization, storage, and on-premises servers, including capacity planning and hardware lifecycle refresh.
- Use NinjaRMM, Azure Monitor, and ticketing systems to monitor health and performance, define service levels, and resolve escalated incidents and problems.
- Lead infrastructure upgrades, migrations, and implementations from planning through delivery and manage vendors.
Candidate qualifications
- 5–8 years of hands-on experience.
- Deep expertise in Azure, Windows Server, Microsoft Entra ID, and Microsoft 365.
- Proven track record of leading teams, delivering modernization projects, and maintaining security and compliance.
- Infrastructure as Code tools listed as alternatives include PowerShell, Bicep/ARM, or Terraform.
- Virtualization experience with Hyper-V and/or VMware.
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