Senior Systems Manager | Expert IT Infrastructure | 7+ Years

About the Senior Systems Manager Role

An established organization is seeking a Senior Systems Manager to lead and support a hands-on IT infrastructure and systems environment in New York City, NY or Old Greenwich, CT.

This is a player-coach IT leadership position for an experienced systems and infrastructure professional who enjoys combining technical leadership with hands-on engineering. The successful candidate will manage and mentor a small desktop and support team while remaining directly involved in systems administration, infrastructure operations, security, compliance and vendor management.

The ideal candidate will have strong experience across Windows Server, Linux, Active Directory, Microsoft Entra ID, Microsoft 365, Exchange Online, VMware vSphere, file services, endpoint security and PowerShell.

Job Details

• Location: New York City, NY or Old Greenwich, CT
• Work Arrangement: Onsite, 5 Days a Week
• Salary: $200,000 + Benefits
• Experience: 7+ Years
• Job Type: Full Time

Key Responsibilities

• Manage and mentor a small desktop and technical support team.
• Administer and support Windows Server environments.
• Support Linux infrastructure.
• Manage Active Directory and Microsoft Entra ID.
• Manage service accounts, SPNs, application registrations and credentials.
• Support credential rotation and identity management processes.
• Administer Microsoft 365 and Exchange Online.
• Manage and maintain VMware vSphere environments.
• Support Windows file servers and Samba file services.
• Manage email security platforms such as Proofpoint or Mimecast.
• Support network security infrastructure including firewalls.
• Work with endpoint and security platforms such as CrowdStrike or Varonis.
• Develop and use PowerShell for automation, administration and operational tasks.
• Perform regular access reviews.
• Support identity and access management processes.
• Participate in change management, audit activities, DDQs and compliance-related requests.
• Manage server hardware and participate in data center and server room operations.
• Support infrastructure requirements related to power and cooling.
• Manage software licensing, technology vendors, renewals and infrastructure contracts.
• Troubleshoot complex infrastructure and systems issues.
• Collaborate with internal teams, executives, vendors and technology stakeholders.
• Travel occasionally to a disaster recovery site or other designated locations when required.

Required Qualifications

• 7+ years of experience in Systems Administration, Infrastructure Engineering, IT Operations or a related field.
• Strong hands-on experience with Windows Server environments.
• Experience supporting Linux environments.
• Strong knowledge of Active Directory and Microsoft Entra ID.
• Experience with service accounts, SPNs, application registrations and credential management.
• Strong Microsoft 365 and Exchange Online experience.
• Hands-on experience with VMware vSphere.
• Experience with Windows file servers and Samba.
• Experience with Proofpoint, Mimecast or similar email security platforms.
• Experience with firewalls and enterprise security infrastructure.
• Experience with CrowdStrike, Varonis or comparable security platforms.
• Strong PowerShell scripting and automation skills.
• Experience with IT audits, access reviews, change control and compliance documentation.
• Strong troubleshooting, communication, documentation and problem-solving skills.
• Ability to work independently while leading and supporting a technical team.
• Ability and willingness to work onsite five days per week.

Preferred Skills

• eDiscovery experience
• Bloomberg entitlement or access management
• Avaya PBX experience
• AWS or cloud infrastructure experience
• Finance or financial services industry experience
• Disaster recovery experience
• Vendor and software license management
• Executive-level user support

Ideal Candidate

The ideal candidate is a hands-on Systems and Infrastructure Manager rather than a purely managerial IT leader.

The candidate should be comfortable working across Active Directory, Entra ID, Microsoft 365, VMware, Windows and Linux servers, security tools, PowerShell, audits, compliance and vendor management.

The successful candidate should also have the leadership ability to manage a small support team while personally handling complex infrastructure issues.

Location and Work Model

This is an onsite position, five days per week, in either New York City, NY or Old Greenwich, CT.

Candidates should be comfortable with occasional travel to designated disaster recovery or executive locations when required.

Compensation

$200,000 + Benefits

Recruiter Screening Priorities

Must Have

• 7+ years relevant experience
• NYC or Old Greenwich or a practical commuting arrangement
• Willingness to work onsite five days per week
• Windows Server
• Active Directory
• Microsoft Entra ID
• Microsoft 365 and Exchange Online
• VMware vSphere
• PowerShell
• Infrastructure and security administration
• Access reviews, audit or change control experience

Strong Plus

• Linux
• Samba
• Proofpoint or Mimecast
• CrowdStrike or Varonis
• eDiscovery
• AWS
• Bloomberg
• Avaya
• Finance or financial services background
• Vendor and license management

Ready to Apply

If your background matches the technical and leadership requirements of this opportunity, review the requirements and apply using the application information provided.

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