Senior Systems Administrator - Enterprise IT & Identity

The Phoenix Group®; United States; On-site; USD 110,000 - 150,000; Full time

Job summary

The Phoenix Group Advisors seeks a seasoned Systems Administrator to maintain and optimize a Microsoft-based infrastructure, support end-user technology, and partner with senior stakeholders to keep operations secure and reliable in a demanding legal and financial technology environment.

This senior role covers identity and access controls, software deployment, server management, virtualization (VMware), and high-availability operations, with emphasis on proactive monitoring and documentation.

Qualifications

• 10+ years of systems administration experience in legal, corporate, or professional services.
• Extensive hands-on with Entra ID, Azure AD, Intune, AD, M365, and Exchange Online.
• Proven packaging, deployment, endpoint management, and Windows imaging.
• Strong Windows Server administration and VMware expertise.
• Experience with legal tech platforms is a plus.

Responsibilities

• Serve as a senior escalation point for complex workstation, application, system, and infrastructure issues, ensuring minimal downtime and rapid resolution.
• Administer and configure Microsoft Entra ID / Azure Active Directory, managing user accounts, permissions, groups, and access controls.
• Manage Microsoft Intune for device enrollment, configuration, application packaging, deployment, policy enforcement, and endpoint imaging/provisioning.
• Support Active Directory, Group Policy, and related identity management services, including account creation, permission management, and security policies.
• Administer and troubleshoot Microsoft 365 and Exchange Online, managing mailboxes, distribution groups, permissions, and email client configurations.
• Package, test, and deploy software applications across Windows environments, maintaining application lifecycle and deployment consistency.
• Oversee Windows Server administration, including patching, permissions management, system monitoring, and troubleshooting.
• Support virtualized environments and related technologies, including VMware, to ensure scalability and high availability.
• Perform operational monitoring, perform routine maintenance, and proactively manage endpoints, servers, and core systems.
• Troubleshoot complex issues involving Windows OS, networking, authentication protocols, applications, and system performance.
• Partner with infrastructure and security teams on system upgrades, migrations, and new technology deployments.
• Maintain comprehensive technical documentation, configuration procedures, and system inventories.
• Support legal technology platforms such as document management, review, and imaging tools (e.g., iManage, Litera, Kofax, Adobe Acrobat).
• Utilize remote management tools, including NinjaOne, for proactive system oversight and support.

Skills

Senior IT experience

Windows troubleshooting

Endpoint management

Security mindset

Tools

Microsoft Entra ID / Azure AD

Intune

Active Directory

Microsoft 365 / Exchange Online

VMware

NinjaOne

iManage

Litera

Kofax

Adobe Acrobat

Job description

The Phoenix Group Advisors seeks a seasoned Systems Administrator to maintain and optimize a Microsoft-based infrastructure, support end-user technology, and partner with senior stakeholders to keep operations secure and reliable in a demanding legal and financial technology environment.

This senior role covers identity and access controls, software deployment, server management, virtualization (VMware), and high-availability operations, with emphasis on proactive monitoring and documentation.