Senior Systems & Infrastructure Engineer

What You'll Do
You will work across multiple client environments with different technologies, configurations and business requirements. Your responsibilities will include:

Own the investigation and resolution of complex infrastructure incidents and escalations.
Administer and troubleshoot Windows Server, Active Directory, Group Policy, DNS and DHCP.
Support Microsoft 365 and Entra ID environments, including identity, authentication, MFA and Conditional Access.
Troubleshoot and support virtualization environments using VMware and/or Hyper-V.
Diagnose networking issues involving firewalls, VPNs, VLANs, routing, switching and connectivity.
Support backup, disaster recovery and business continuity systems.
Plan and execute infrastructure migrations, upgrades and modernization projects.
Perform root-cause analysis and implement or recommend changes that prevent recurring problems.
Use PowerShell, scripting, automation and other tools where they can improve reliability and efficiency.
Create and maintain clear technical documentation.
Work directly with clients, vendors and other GEM engineers during projects and technical incidents.
Provide occasional onsite support at client locations in the New York City metropolitan area.
What We're Looking For
We care more about demonstrated technical depth, troubleshooting ability and ownership than a perfect list of certifications or products on a resume.

Strong candidates will have substantial hands-on experience supporting production IT infrastructure and personally resolving complex technical problems.

You should have strong experience in most of these areas:

Microsoft Infrastructure
Windows Server and Active Directory
Group Policy, DNS and DHCP
Microsoft 365 and Entra ID
Identity, MFA and Conditional Access
Virtualization and Core Infrastructure
VMware vSphere/ESXi and/or Microsoft Hyper-V
Server and storage infrastructure
Backup and disaster recovery
Networking and Security
Firewalls, VPNs, VLANs, routing and switching
Network and infrastructure troubleshooting
System hardening, EDR, MFA and related security technologies

Requirements
Experience That Will Set You Apart
We are particularly interested in candidates with meaningful hands-on experience in one or more of the following:

Microsoft Exchange Server and hybrid Exchange environments
Citrix Virtual Apps and Desktops (CVAD)
Citrix NetScaler / ADC
Advanced VMware infrastructure
Advanced networking and firewall troubleshooting
Veeam or similar backup and disaster recovery platforms
PowerShell scripting and automation
Infrastructure migrations and major upgrades