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.
Responsibilities
Leadership and team development

• 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.

Architecture and strategy

• 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.

Observability and reliability

• 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.

Operations and incident management

• 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.

Projects and automation

• Lead medium-to-large, cross-functional infrastructure projects from requirements through delivery and operational handoff.
• Push for automation with Terraform, Ansible, PowerShell, 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.

Qualifications

• 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.
• Strong networking fundamentals: TCP/IP, DNS, DHCP, VLANs, routing, firewalls and load balancing.
• A track record of leading complex projects, managing incidents and running root-cause analysis.
• Experience with budgeting, vendor management and technology roadmapping.
• Excellent communication skills, including presenting to technical teams and to leadership.
• Willingness to take part in and manage an on-call rotation.

Preferred Qualifications

• Datadog managed as code through Terraform or the API. Mature IaC and GitOps practices.
• Advanced automation with Terraform, Ansible, PowerShell and Python.
• Expertise in Active Directory, Entra ID, IAM and Microsoft 365.
• Experience leading large-scale cloud migrations or datacenter consolidations.
• Experience designing high availability, disaster recovery and business continuity, and applying security frameworks (CIS, NIST).
• Familiarity with ITIL and with change, incident and problem management.
• Certifications such as VMware VCP or VCAP, Azure Solutions Architect Expert, AWS Solutions Architect – Professional, or equivalent.

What Success Looks Like

• The team runs reliable, observable and secure infrastructure with fewer and shorter incidents.
• Datadog coverage is complete, standardized and managed as code. Alerts are actionable and low-noise.
• Patching, lifecycle and DR testing finish on schedule and are auditable.
• Major projects are delivered on time and within budget.
• The team grows in skill and independence, and on-call becomes sustainable.
• The Lead becomes a trusted advisor to leadership on infrastructure architecture and cloud strategy.

About ManpowerGroup, Parent Company of:  Manpower, Experis and Talent Solutions

Experis® is a global leader in technology services and part of the ManpowerGroup® (NYSE: MAN) family of brands. We connect skilled technology professionals with meaningful opportunities where they can grow their careers, expand their expertise and make a real impact. Guided by the belief that it takes Human Ingenuity to unlock the true potential of technology, Experis helps people gain experience with leading organizations, build sought-after skills and take the next step toward a brighter future. Backed by ManpowerGroup's 75+ years of workforce expertise and global reach across more than 70 countries and territories, Experis brings the scale, insight and opportunity to help people and businesses thrive. ManpowerGroup is consistently recognized for its commitment to inclusion, ethics and responsible business, including being named one of the World's Most Ethical Companies. Learn more at Experis.com.