SRE​/CORE Infrastructure Engineer - Lead

Core Infrastructure Lead

Hybrid--3 days per week onsite in Greenwich, CT (NO REMOTE CANDIDATES) Full-time, direct hire Must be US Citizen or Green Card holder

We're hiring a SRE/Core Infrastructure Engineer – Lead to provide technical and team leadership for our on-premises and cloud infrastructure group. This senior role sets technical direction, leads a team of infrastructure engineers, owns how well we operate, and works with leadership on infrastructure and cloud strategy. The Lead stays hands‑on with complex engineering work and builds team capability, standards and processes.

• Lead, mentor and coach a team of Professional and Associate infrastructure engineers.
• Assign and prioritize work, balancing project delivery, operational support and technical debt.
• Run team planning, code and design reviews, and knowledge-sharing sessions.
• Help hire, onboard, set performance goals for and grow team members.
• Serve as the main technical escalation point for the infrastructure group.

• Own the architecture, standards and reference designs for VMware (vSphere, ESXi, vCenter), compute, storage, backup and cloud platforms (AWS, Azure or GCP).
• Build and maintain the infrastructure technology roadmap, including hybrid-cloud and cloud‑migration plans.
• Evaluate new technologies, vendors and platforms.
• Prepare business cases, cost analyses and recommendations.
• Help with budgeting, forecasting, licensing, contract renewals and vendor management.
• Find and reduce infrastructure risk across availability, security, capacity and lifecycle.

• Own the Datadog monitoring strategy and standards for infrastructure and supported services.
• Define standards for monitors, tagging, dashboards, alert thresholds, notification routing and escalation.
• Bring Datadog configuration under infrastructure-as-code (Terraform or the API).
• Lead efforts to cut alert noise, close monitoring gaps and improve mean time to detect and resolve (MTTD/MTTR).
• Set and report on SLOs, SLIs, availability, capacity and service-health metrics for leadership.

• Own the on‑call rotation, including its structure, runbooks and escalation paths.
• Take part in on‑call as needed.
• Act as incident commander for major infrastructure incidents.
• Lead blameless post‑incident reviews and track corrective actions to completion.
• Make sure patching, upgrades, lifecycle management and vulnerability remediation finish on schedule and stay compliant.
• Own the disaster‑recovery and business‑continuity plans, including regular DR testing and validation.

• Lead medium‑to‑large, cross‑functional infrastructure projects from requirements through delivery and operational handoff.
• Push for automation with Terraform, Ansible, Power Shell, Python and CI/CD pipelines.
• Set documentation standards for runbooks, architecture diagrams, asset inventory and DR procedures.
• Partner with the security, networking, application, cloud, identity and business teams.

• 10+ years in systems administration, infrastructure engineering or cloud engineering, including at least 2–3 years leading engineers or technical teams.
• Expert-level, hands‑on VMware experience (vSphere, ESXi, vCenter), including design, upgrades and performance tuning.
• Deep knowledge of Windows Server and/or Linux administration at enterprise scale.
• Strong enterprise storage and backup expertise: SAN, NAS, RAID, snapshots, replication, backup and recovery, and capacity planning.
• Proven experience designing and running workloads in AWS and/or Azure.
• Advanced Datadog (or comparable) experience, including setting monitoring standards and building monitors, dashboards, alerts and SLOs at scale.
• Stro…