Senior Systems Engineer - Windows, Linux, VMware, Networking, and Cloud Infrastructure

⚠️ IMPORTANT: No C2C, No Third-Party Agencies, No Consultants. W2 Direct Hire Only. US Citizens and Green Card Holders Only.

ABOUT THE ROLE

We are seeking a highly skilled and versatile Senior Systems Engineer to manage and evolve a diverse IT infrastructure environment spanning Windows, Linux, VMware, networking, and cloud platforms. This is a hands-on individual contributor role with direct exposure to a broad range of technology initiatives and high visibility across all trading technology groups.

You will collaborate closely with the CTO, Engineering, and Data teams to maintain, build, and evolve our infrastructure — including physical servers at headquarters and an offsite datacenter. We are looking for someone who is technically deep, takes ownership, and wants to build a long-term career here.

This is a stable opportunity at a well-established $20 billion fixed income hedge fund with a collaborative IT team and senior leadership that values good infrastructure work.

REQUIRED SKILLS

• Windows Server & Microsoft 365 — In-depth knowledge of Active Directory, Azure AD, MS Teams, and Multi-Factor Authentication. This represents approximately 70% of the day-to-day workload. Must be able to administer Windows environments from the command line without hesitation.

Looking to advance your IT & Network Engineering career with relocation support? Explore IT & Network Engineering Jobs with Relocation Packages that include comprehensive packages to help you move and settle in your new role.

• Linux Administration — Hands-on enterprise Linux experience across any major distribution. Approximately 30% of the role. Must be comfortable building and configuring Linux environments from scratch including package management, user administration, and network configuration from the command line.
• Networking — Strong, proven understanding of TCP/IP, DNS, DHCP, VLANs, subnetting, and switch configuration. Experience with enterprise-grade firewalls (Palo Alto, Fortinet, or similar). Cloud portal knowledge alone is not sufficient — we need someone who understands how networks are actually architected.
• Email Security — Solid understanding of how email servers are found on the internet, including MX records, mail flow, SPF, DKIM, DMARC, spam filtering, malware protection, and DLP. Must be able to explain and troubleshoot these without referencing documentation.
• AWS/Cloud Computing — Hands-on experience provisioning and configuring EC2 instances, S3, IAM, VPC, and related services. Must understand what these services do and have real examples of using them in production.
• VMware vSphere — Experience managing and configuring VMware virtualized environments including ESXi and vCenter. New cluster builds and configuration experience is a plus.
• Physical Infrastructure — Hands-on experience with server hardware including racking, cabling, diagnostics, and component replacement. Must be able to periodically drive to our offsite datacenter as needed.
• Scripting & Automation — Working knowledge of PowerShell, Python, or Bash for task automation and workflow optimization. Must have real examples of scripts written from scratch.
• Security & Compliance — Familiarity with endpoint security, EDR tools, and IT compliance standards appropriate for a regulated financial services environment.

Discover our full range of relocation jobs with comprehensive support packages to help you relocate and settle in your new location.

DESIRABLE BACKGROUND

• 7–10 years of experience managing enterprise-level IT infrastructure
• Experience in financial services, hedge funds, asset management, or similarly regulated environments strongly preferred
• Bachelor's degree in Computer Science, Information Technology, or related field (or equivalent experience)
• Experience with configuration management tools such as Ansible
• Familiarity with Nutanix or other HCI platforms

Interested in relocating to United State? Check out our comprehensive Relocation Jobs in United State page with detailed relocation packages and benefits.

RELOCATION

Relocation assistance is available for the right candidate. We are looking for someone who will commit to this role and this location long term. If you are not currently in the Stamford/Greenwich CT area, we expect relocation to be completed within 2–4 weeks of offer acceptance.

WHAT WE'RE LOOKING FOR

Beyond the technical skills, we want someone who takes pride in their work, communicates clearly and directly with both technical and non-technical stakeholders, and is looking to build a career — not just fill a seat. Candidates who cannot speak to their experience confidently and in detail will not advance in our process.

🇺🇸US Citizens and Green Card Holders Only| W2 Direct Hire Only | No C2C |No Consultants | No Third-Party Agencies