Senior Systems Administrator

The Phoenix Group; New York (NY); On-site; USD 99,000 - 121,000; Full time

Benefits offered by this job

Bonus potential

Job summary

The Phoenix Group Advisors is seeking a Senior Systems Administrator to maintain and optimize a Microsoft-based infrastructure in a demanding legal and financial technology environment. You will support end-user technology, manage identity and access, and ensure high availability across servers and endpoints.

With 10+ years in IT, you will handle active directory, Intune, and Exchange Online, packaging and deploying software, and collaborating with security teams on upgrades and migrations.

Qualifications

• 10+ years of experience in Systems Administration or senior IT support within a professional services setting.
• Extensive hands-on experience with Microsoft Entra ID / Azure AD, Intune, Active Directory, Microsoft 365, and Exchange Online.
• Proven ability to package software, deploy applications, manage endpoints, and image/provision Windows environments.
• Strong Windows Server administration skills including patching, permissions, and virtualization ( VMware ).

Responsibilities

• Serve as a senior escalation point for complex workstation, system, and infrastructure issues, ensuring rapid resolution.
• Administer and configure Microsoft Entra ID / Azure AD, managing user accounts, permissions, groups, and access controls.
• Manage Microsoft Intune for device enrollment, configuration, packaging, deployment, and endpoint provisioning.
• Support Active Directory, Group Policy, and related identity management services with account creation and security policy enforcement.
• Administer and troubleshoot Microsoft 365 and Exchange Online, including mailboxes and permissions.
• Package, test, and deploy software applications across Windows environments with consistent lifecycle management.
• Oversee Windows Server administration, including patching, permissions, monitoring, and troubleshooting.
• Support virtualized environments (VMware) to ensure scalability and high availability.
• Perform ongoing operational monitoring and proactive endpoint/server management.
• Troubleshoot Windows OS, networking, authentication, and system performance issues.
• Collaborate with infrastructure and security teams on upgrades, migrations, and new deployments.
• Maintain documentation, procedures, and inventories for systems and configurations.
• Support legal tech platforms (iManage, Litera, Kofax, Adobe Acrobat).
• Utilize remote management tools such as NinjaOne for proactive oversight.

Skills

Senior IT experience

Identity & Access management

End-user support

Windows troubleshooting

Tools

NinjaOne

VMware

Intune

Azure AD

Job description

A dynamic opportunity to support a prominent professional services organization with a robust IT environment awaits a highly skilled Systems Administrator. This role offers a chance to manage critical infrastructure and collaborate with senior stakeholders to ensure seamless operations across a demanding legal and financial technology landscape.

Role Overview

The Systems Administrator is a senior-level technical expert responsible for maintaining and optimizing the organization’s Microsoft-based infrastructure, supporting end-user technology, and ensuring operational integrity. This role involves escalated troubleshooting, endpoint management, identity and access control, software deployment, and light infrastructure support within a high-availability environment.

Key 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.

Core Qualifications & Requirements

• 10+ years of experience in Systems Administration, Infrastructure Support, or senior-level IT support within a legal, corporate, or professional services setting.
• Extensive hands-on expertise with Microsoft Entra ID, Azure AD, Intune, Active Directory, Microsoft 365, and Exchange Online.
• Proven experience with application packaging, software deployment, endpoint management, and Windows imaging/provisioning.
• Solid understanding of Windows Server administration, including patching, permissions, and virtualization technologies like VMware.
• Advanced troubleshooting skills across endpoints, systems, networks, and applications.
• Experience supporting highly available, client-focused IT environments.
• Familiarity with legal technology platforms (iManage, Litera, Kofax, Adobe Acrobat) is a plus.
• Ability to work independently with minimal supervision while collaborating effectively with support and infrastructure teams.

Nice-to-Have Qualifications

• Experience with remote monitoring and management tools such as NinjaOne.
• Prior law firm or professional services firm experience demonstrating familiarity with legal workflows.
• Stable employment history indicating good tenure and career progression.

Core Technical Skills

• Active Directory & Group Policy
• Application packaging and Windows imaging
• Network troubleshooting and infrastructure support
• Legal tech platforms support (iManage, Litera, Kofax, Adobe Acrobat)

Join a high-caliber organization where your expertise ensures the stability, security, and efficiency of mission-critical legal and professional services technology.

Compensation and Benefits

Competitive salary commensurate with experience, up to $110,000 annually, with potential for bonus and benefits.

The Phoenix Group Advisors is an equal opportunity employer. We are committed to creating a diverse and inclusive workplace and prohibit discrimination and harassment of any kind based on race, color, religion, gender, sexual orientation, gender identity or expression, national origin, age, genetic information, disability, or veteran status. We strive to attract talented individuals from all backgrounds and provide equal employment opportunities to all employees and applicants for employment.