Senior Systems Engineer

Senior Systems Engineer Location: Hicksville, NY Work Arrangement: Hicksville office / client onsite as required Position Type: Full-Time Position Overview We are seeking an experienced Senior Systems Engineer to join our Managed Services team. This is a hands-on technical role responsible for supporting client environments, implementing infrastructure projects, troubleshooting complex issues, and designing and deploying on-premises and cloud solutions.

The ideal candidate will have strong experience with Citrix, Windows Server, Microsoft 365, VMware/Hyper-V, Azure, and AWS , along with the ability to build and troubleshoot server and infrastructure environments from the ground up. This position will be based out of our Hicksville, NY office , with travel to client locations as required to support projects, implementations, escalations, and other onsite needs.

Key Responsibilities

Provide senior-level technical support for client infrastructure environments. Design, build, configure, migrate, and troubleshoot Windows Server environments. Deploy and maintain physical and virtual servers, including server builds, upgrades, migrations, and decommissioning. Support and administer Citrix environments, including Virtual Apps and Desktops, StoreFront, Delivery Controllers, and related infrastructure.

Manage virtualization technologies including VMware vSphere/ESXi and Microsoft Hyper-V . Implement and support cloud infrastructure within Microsoft Azure and AWS . Support hybrid environments spanning on-premises infrastructure and public cloud platforms. Administer Active Directory, Group Policy, DNS, DHCP, Microsoft Entra ID, and Microsoft 365 .

Troubleshoot complex server, application, authentication, network, storage, and performance issues. Perform infrastructure migrations, upgrades, and modernization projects. Support backup, disaster recovery, business continuity, and infrastructure resiliency solutions. Provide escalation support for Help Desk and other engineering teams.

Participate in client-facing technical meetings and provide recommendations regarding infrastructure improvements. Create and maintain accurate technical documentation, diagrams, procedures, and configuration information. Work independently on assigned client projects while coordinating with project managers and other technical resources.

Travel to client locations throughout the region for onsite support and project work as required. Participate in scheduled after-hours project work and escalation support when required. Required Qualifications 7+ years of hands-on systems administration or infrastructure engineering experience. Advanced experience with Windows Server administration, configuration, troubleshooting, and server builds.

Strong experience administering Active Directory, Group Policy, DNS, and DHCP . Strong hands-on experience supporting Citrix environments. Experience with VMware vSphere/ESXi and/or Hyper-V . Experience supporting and deploying workloads within Microsoft Azure . Experience with AWS infrastructure and services . Strong understanding of Microsoft 365 and Microsoft Entra ID .

Experience with server and infrastructure migrations. Solid understanding of TCP/IP, VLANs, routing, VPNs, firewalls, storage, and general networking concepts. Experience troubleshooting complex infrastructure issues across multiple technologies. Strong documentation and organizational skills. Excellent communication and client-facing skills.

Ability to manage multiple priorities and projects in a managed services environment. Ability to work from the Hicksville office and travel to client locations as required .

Preferred Qualifications

Experience working for an MSP or IT consulting organization . Experience supporting multi-client environments. Citrix certifications or significant equivalent hands-on experience. Microsoft Azure certifications such as AZ-104 or AZ-305 . AWS certifications. Microsoft 365 and hybrid identity experience. PowerShell scripting and infrastructure automation experience.

Experience with enterprise backup, storage, monitoring, and disaster recovery platforms. Experience with RMM, PSA, and remote management platforms.

What We're Looking For

We are looking for someone who is more than an administrator. The right candidate is a senior-level engineer who can take ownership of an issue or project, work directly with clients, troubleshoot complex environments, and drive technical work through completion . This individual should be equally comfortable building a new server environment, troubleshooting a Citrix issue, performing an Azure migration, supporting an onsite client project, or serving as the senior escalation point for a difficult infrastructure problem.