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Senior Systems Engineer, Infrastructure
GEM Technologies. Own investigation and resolution of complex infrastructure incidents and escalations .
Posted 9/22/2026full-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 virtualization environments. Proficient in implementing security measures, managing backup and disaster recovery systems, and executing infrastructure migrations while effectively communicating technical issues to diverse audiences.
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 PolicyDNSDHCPIdentity ManagementMFAConditional AccessPowerShell ScriptingInfrastructure MigrationsBackup and Disaster RecoveryFirewall Troubleshooting
Soft Skills
Problem SolvingClient CommunicationTechnical OwnershipIndependent WorkTeam Collaboration
Tools & Technologies
VMwareMicrosoft Hyper-VCitrix Virtual Apps and DesktopsCitrix NetScalerVeeam
Industry Keywords
IT InfrastructureMulti-Client EnvironmentTechnical DocumentationBusiness ContinuityRoot-Cause Analysis
Tech Stack
Tools & technologiesCitrixDNSFirewallsSwitchingVMware
About the role
Key responsibilities & impact- Own 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 VMware and/or Hyper-V virtualization environments
- 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 preventive changes
- Use PowerShell, scripting, automation and other tools to improve reliability and efficiency
- Create and maintain 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
- Take ownership of complex technical problems through resolution across multiple client environments
Requirements
What you’ll need- Substantial hands-on experience supporting production IT infrastructure and resolving complex technical problems
- Strong experience with Windows Server and Active Directory
- Experience with Group Policy, DNS and DHCP
- 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 hands-on proficiency across most listed technologies, with deeper expertise in several areas
- Ability to troubleshoot broadly, work independently and demonstrate technical depth and ownership
- Ability to communicate directly with clients and explain complex technical issues to technical and nontechnical audiences
- Willingness and ability to provide onsite support when required in the New York City metropolitan area
- Legally authorized to work in the United States
- Experience with an MSP, technology consulting firm or other multi-client environment strongly preferred
- 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 with Veeam or similar backup and disaster recovery platforms
- PowerShell scripting and automation
- Infrastructure migrations and major upgrades
Benefits
Comp & perks- Health insurance
- Paid time off
- Other employee benefits
- Primarily remote work
- Responsible use of AI, scripting and automation encouraged to improve troubleshooting, documentation and operational efficiency