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Senior Systems – Infrastructure Engineer
GEM Technologies. Own the investigation and resolution of complex infrastructure incidents and escalations .
Posted 10/3/2026full-timeNew York City • New York • United StatesSenior💰 $90,000 - $120,000 per yearWebsite
Core Competencies
Role fitCore Competencies
Use this summary to align your resume positioning with the role.
Demonstrates extensive experience in supporting and troubleshooting complex IT infrastructure, including Windows Server, Active Directory, and Microsoft 365 environments. Proficient in network diagnostics, virtualization technologies, and implementing disaster recovery solutions.
Highest-signal resume keywords
Windows Server AdministrationActive Directory ManagementMicrosoft 365 SupportVMware vSphere/ESXi ExperienceNetwork Troubleshooting
ATS Keywords
Tailor your resumeApplicant Tracking System Keywords
Tip: use these terms in your resume and cover letter to boost ATS matches.
Hard Skills
Group PolicyDNSDHCPPowerShell ScriptingBackup and Disaster RecoveryIdentity ManagementMFA ImplementationCitrix Virtual Apps and DesktopsFirewall ConfigurationInfrastructure Migrations
Soft Skills
Client CommunicationTechnical DocumentationProblem-SolvingIndependent WorkCollaboration
Tools & Technologies
Microsoft Entra IDVMwareHyper-VVeeamCitrix NetScaler
Industry Keywords
Infrastructure IncidentsBusiness ContinuityRoot-Cause AnalysisNetwork SecurityOnsite Support
Tech Stack
Tools & technologiesCitrixDNSFirewallsSwitchingVMware
About the role
Key responsibilities & impact- 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 to 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
- Work across multiple client environments with different technologies, configurations and business requirements
Requirements
What you’ll need- Substantial hands-on experience supporting production IT infrastructure
- Strong experience with Windows Server and Active Directory
- Strong experience with Group Policy, DNS and DHCP
- Strong experience with Microsoft 365 and Entra ID
- Experience with identity, MFA and Conditional Access
- Experience with VMware vSphere/ESXi and/or Microsoft Hyper-V
- Experience with server and storage infrastructure
- Experience with backup and disaster recovery
- Experience with firewalls, VPNs, VLANs, routing and switching
- Experience with network and infrastructure troubleshooting
- Experience with system hardening, EDR, MFA and related security technologies
- Strong client communication skills and ability to explain complex technical issues to technical and nontechnical audiences
- Broad technical capability, demonstrated troubleshooting depth, and ability to work independently across multiple systems
- Willingness and ability to provide occasional onsite support at client locations in the New York City metropolitan area
- Legally authorized to work in the United States
- Experience with Microsoft Exchange Server and hybrid Exchange environments
- Experience with Citrix Virtual Apps and Desktops (CVAD)
- Experience with Citrix NetScaler / ADC
- Advanced VMware infrastructure experience
- Advanced networking and firewall troubleshooting experience
- Experience with Veeam or similar backup and disaster recovery platforms
- PowerShell scripting and automation experience
- Infrastructure migrations and major upgrades experience
Benefits
Comp & perks- Health insurance
- Paid time off
- Other employee benefits