Senior Systems Engineer

Accountabilities: As Senior Systems Engineer, you will oversee enterprise infrastructure operations, provide advanced technical expertise, and ensure systems remain secure, scalable, and aligned with organizational requirements. Design, implement, administer, and maintain enterprise systems, including Microsoft Exchange, physical and virtual servers, Active Directory, Group Policy, Certificate Services, authentication platforms, compute, networking, storage, and remote access services. Manage and support cloud-based infrastructure and services, including Microsoft Azure, Entra ID, and Office 365. Administer and optimize Citrix Virtual Desktop Infrastructure (VDI), load balancers, and SSL certificate management. Monitor and continuously improve system performance, availability, scalability, and security. Perform routine, scheduled, and long-term infrastructure maintenance while maintaining high operational and service standards. Serve as the senior escalation point for complex technical incidents and infrastructure-related challenges. Develop and maintain comprehensive technical documentation, including operational procedures, troubleshooting guides, training materials, and change management records. Participate in on-call rotations and provide after-hours support when required. Support occasional overtime, off-hours activities, and travel based on operational and project needs. Implement security best practices and ensure infrastructure compliance with relevant security protocols and regulatory requirements. Collaborate with Information Security, Applications, and Infrastructure teams on risk assessments, vulnerability reduction, and system hardening initiatives. Ensure secure and efficient integrations that comply with enterprise architecture and governance standards. Maintain accurate documentation of data flows, API endpoints, schemas, and integration logic. Contribute to the evaluation, selection, implementation, and continuous improvement of enterprise integration platforms. Support data quality, integrity, and reconciliation processes across interconnected systems. Requirements The ideal candidate brings extensive enterprise systems engineering experience, deep Microsoft and virtualization expertise, and the ability to manage complex infrastructure environments while driving security and operational improvements. At least 10 years of experience as a Systems Engineer, with extensive Microsoft Server experience in enterprise environments. At least 10 years of experience designing, building, securing, and managing VMware-based virtualized environments, including ESXi and vCenter. Hands-on experience implementing and securing Hyperconverged Infrastructure (HCI) solutions such as Nutanix, Dell VxRail, or HPE. Proven experience administering Citrix VDI, load balancers, and SSL certificate management. Experience managing enterprise messaging and mail services, particularly Exchange Online. Strong experience with Microsoft Azure and Entra ID. Familiarity with enterprise storage technologies, including block storage (SCSI/NVMe), file storage (CIFS/NFS), and object storage (S3). Experience with enterprise backup and recovery platforms such as Rubrik, Cohesity, or Veeam. Demonstrated ability to manage enterprise-wide systems and compute infrastructure across multiple technology components simultaneously. Expert knowledge of Microsoft Windows enterprise environments, including Active Directory, Microsoft 365, and PKI design, administration, and support. Advanced understanding of VMware, Windows Server, TCP/IP, DNS, and related networking protocols. Strong knowledge of network architecture and administration, including LAN/WAN, MPLS, VPN, VLAN, and Wi-Fi. Solid understanding of encryption technologies, cybersecurity risk mitigation, and infrastructure hardening practices. Advanced PowerShell scripting skills for automation, system administration, and utility development. Experience with infrastructure monitoring and observability platforms such as SolarWinds, LogicMonitor, Splunk, or Aria. Bachelor's degree in Computer Science, Computer Information Systems, or a related field preferred; an advanced degree is an advantage. Strong analytical, troubleshooting, and problem-solving abilities. Excellent collaboration and communication skills, with the ability to work effectively across multiple technical teams. Benefits Hourly compensation of $65–$75 per hour. Fully remote working arrangement within the United States. Six-month contract-to-permanent opportunity. Opportunity to work on complex enterprise infrastructure and modernization initiatives. Exposure to advanced Microsoft, VMware, Azure, Citrix, and hyperconverged infrastructure technologies. Collaboration with experienced professionals across infrastructure, applications, and cybersecurity teams. Inclusive work environment committed to equal employment opportunities and welcoming diverse backgrounds and perspectives.