Lead System Administrator

POSITION OVERVIEW

The Senior System Administrator will lead the administration and optimization of our IT infrastructure, ensuring high availability, security, and scalability across on-premises and cloud environments. This role involves mentoring team members, driving automation, and implementing best practices for system reliability and security along with leading projects including M&A integrations to support CR’s growth goals. The right candidate should have a customer-centric focus and delight in implementing and maintaining resilient infrastructure to meet business needs. This role emphasizes automation and hybrid cloud integration and requires extensive Azure experience.

Our Tech Stack

· Cloud: Azure and AWS (S3) for select workloads

· Virtualization: VMware vSphere, Hyper V, Azure

· Operating Systems: Windows Server, Linux (Ubuntu/CentOS)

· Networking: Zscaler, Cisco, Ubiquiti

· Automation: PowerShell, Intune

· Monitoring: Goliath, Datto, Azure

· Security: Active Directory, CrowdStrike, ZTN, Qualys

· Helpdesk: Jira Service Management

KEY RESPONSIBILITIES

· Lead administration of Windows and Linux servers, Active Directory, Entra ID, Intune configuration profiles, Intune admin profiles, Intune policies and Group Policies.

· Manage Azure infrastructure including implementation of IaaS/PaaS, building virtual resources, storage accounts, and networking.

. Apply Microsoft and industry best practices to the implementation and operation of Azure IaaS and PaaS, both in cloud-optimized and lift-and-shift scenarios.

· Automation and Infrastructure as Code (IaC) scripts using Terraform, Ansible, and PowerShell.

· Manage and optimize virtualization environments (VMware, Horizon, Hyper V, Azure) and cloud resources.

· Work with the security team to design and implement backup and disaster recovery strategies.

· Ensure network security and performance, including SASE, firewall and VPN configurations.

· Monitor system health and performance; proactively detect and prevent or swiftly resolve complex issues.

· Mentor and develop team of system administrators and provide technical leadership.

· Collaborate with Enterprise Application and Cyber Security teams to mitigate risk and maintain compliance and security standards.

EXPERIENCE & QUALIFICATIONS

· 10+ years of experience in system administration (Windows/Linux).

· Advanced in-depth Azure Experience (Landing Zones, AVD, Monitoring, Performance Management, etc.).

· Strong expertise in VMware, Active Directory, Entra, and cloud platforms (Azure, AWS).

· Advanced knowledge of networking fundamentals and security best practices.

· Proficiency in automation (PowerShell, Bash, other scripting tools, Intune).

· Experience with monitoring tools and incident response.

· Experience with Intune and Autopilot administration

Preferred Qualifications

· Certifications: Microsoft Certified: Windows Server, Azure, VMware VCP, Security+.

· Familiarity with DevOps principles and Infrastructure as Code.