Senior System Engineer
18 hours ago
New York
Position Overview An infrastructure team is seeking a hands-on Senior Infrastructure Engineer to support the design, implementation, operation, and optimization of global systems. This role is responsible for maintaining secure, reliable, and consistent infrastructure services across development, test, and production environments. The position combines daily operations with engineering-focused project work and requires close collaboration with application, support, security, and business technology teams. Mandatory Requirements: • Must have 10+ years of experience working in an IT infrastructure environment., • Must be able to follow a hybrid work schedule of 4 days in office and 1 day remote at the designated office location., • Must be willing to work evenings, weekends, and participate in on-call coverage as required for a 24x7 IT operation., • Must have advanced experience with Citrix technologies, including Delivery Controller, PVS, StoreFront, and NetScaler / VPX deployments., • Must have extensive experience with Azure and AWS public cloud environments, including IaaS and PaaS workloads., • Must have strong Windows Server administration experience, including patching, security updates, monitoring, and performance tuning., • Must have strong Active Directory expertise, including troubleshooting, replication, domains, GPOs, and ACLs., • Must have experience supporting multiple globally distributed locations., • Must demonstrate strong communication, organization, interpersonal, and customer service skills., • Must be able to manage multiple priorities under pressure while maintaining accuracy, confidentiality, and professionalism. Key Responsibilities • Maintain a secure, stable, and current infrastructure environment across global systems., • Support infrastructure project work throughout the full application implementation lifecycle, following established architecture standards and best practices., • Provide infrastructure support for business-critical back-office applications, including trading, fund accounting, and financial accounting platforms., • Manage Windows Server environments across development, testing, and production, including patching, security remediation, performance monitoring, and tuning., • Configure, maintain, and support VMware-based virtualization platforms, including related software and hardware components., • Administer and optimize Citrix infrastructure, including application and desktop delivery components., • Support Azure and AWS environments, including virtual networks, private connectivity, storage, containers, serverless services, and managed database platforms., • Manage compute and storage platforms, including Cisco UCS and PURE Storage or comparable technologies., • Use SCCM or similar endpoint and server management tools for patching, system updates, and package deployment., • Monitor infrastructure health, capacity, performance, and availability; create reporting and alerts to support operational visibility., • Assist with capacity planning to ensure infrastructure systems meet current and future business needs., • Troubleshoot escalated issues and partner with help desk teams to resolve complex technical problems., • Maintain and improve infrastructure documentation, including operational runbooks, system designs, and management-requested materials., • Support infrastructure security controls, authentication processes, privileged access management, and vulnerability remediation., • Develop and maintain automation using PowerShell, code repositories, and CI/CD pipelines., • Perform root cause analysis for infrastructure incidents and implement improvements to reduce recurrence., • Manage and maintain task scheduling platforms., • Work respectfully and effectively with business users, support teams, and technical stakeholders. Required Qualifications • Bachelor’s degree in Information Technology, Computer Science, Engineering, or equivalent professional experience., • 10+ years of experience in IT infrastructure, preferably within a financial services, trading, or similarly high-availability environment., • Advanced hands-on experience with Citrix Delivery Controller, PVS, StoreFront, and NetScaler / VPX configuration and deployment., • Extensive experience designing, deploying, operating, and maintaining Windows Server environments., • Strong experience with Microsoft infrastructure technologies, including SQL Server, Exchange, Active Directory, and related services., • Deep Active Directory administration skills, including troubleshooting, replication, domain configuration, GPO creation and consolidation, and ACL management., • Strong working knowledge of Office 365, Azure AD / Entra ID, and related Microsoft cloud services., • Extensive experience with Azure and AWS public cloud platforms, including IaaS, PaaS, VNets, VPCs, private networking, storage accounts, containers, function apps, and managed databases., • Strong experience managing Cisco UCS compute environments and PURE Storage arrays or similar enterprise storage platforms., • Experience with VMware virtualization administration and support., • Working knowledge of SCCM or comparable tools for system updates and software package deployment., • Understanding of infrastructure security, authentication, and access technologies, including SAML, Kerberos, RADIUS, and MFA., • Experience with privileged access management and privileged identity management., • Experience using vulnerability scanning and remediation platforms such as Rapid7., • Experience managing monitoring platforms, including advanced alerting, dashboards, and operational reporting., • Proficiency with PowerShell scripting., • Experience working with code repositories and CI/CD pipelines., • Strong troubleshooting and root cause analysis skills., • Ability to support multiple geographically distributed locations., • Ability to work effectively in a high-pressure environment with competing priorities and demanding deadlines., • Strong ethics, sound judgment, and ability to handle confidential information appropriately., • Excellent communication, organization, customer service, and interpersonal skills., • Ability to work collaboratively with people across different teams, backgrounds, and perspectives. Preferred Qualifications • Experience supporting infrastructure in a financial services or trading environment., • Experience with Citrix Cloud., • General SQL Server database administration experience., • Experience with Microsoft security services such as Defender ATP and Intune., • Experience with cloud security best practices., • Experience with Entra ID, Azure Policy, Azure Site Recovery, Azure Backup Center, and other Azure services., • Exposure to Infrastructure as Code tools and practices., • Familiarity with Cloud Adoption Framework and Well-Architected Framework principles., • Experience improving infrastructure documentation, runbooks, and operational standards. Why Join This Team / Organization Summary This role offers the opportunity to support and engineer critical infrastructure across a complex, global technology environment. The position is suited for a senior infrastructure generalist who enjoys hands-on operations, project delivery, automation, cloud platforms, and collaboration with technical and business teams.