Infrastructure Manager

Location

New York, NY

None

Full Time

170k with benefits

Seneca Resources is seeking an experienced IT Infrastructure Engineer / Mainframe Systems Manager to support a large public sector organization in New York, NY. This leadership role is ideal for a seasoned infrastructure professional with deep expertise in enterprise mainframe operations, IBM z/OS environments, datacenter infrastructure, disaster recovery, and enterprise systems management.

The selected candidate will lead the Mainframe Systems team responsible for maintaining the stability, performance, security, and availability of mission‑critical enterprise infrastructure. This role requires strong technical leadership, strategic planning capabilities, and hands‑on experience managing large‑scale infrastructure operations in highly complex environments.

This position offers the opportunity to drive modernization initiatives, oversee enterprise infrastructure operations, lead high‑impact technical projects, and collaborate across multiple technical and business teams in a mission‑driven environment.

• Lead and manage enterprise mainframe infrastructure operations and daily system activities.
• Oversee IBM mainframe systems, z/OS administration, enterprise storage, disaster recovery operations, and related infrastructure technologies.
• Ensure high availability, operational stability, and SLA compliance for critical production systems.
• Provide leadership for infrastructure troubleshooting, incident response, root cause analysis, and operational support activities.
• Coordinate 24/7 operational support and scheduled maintenance activities as needed.
• Supervise and mentor technical infrastructure staff while establishing operational goals and performance expectations.
• Coordinate cross‑functional infrastructure initiatives with internal technology teams and business stakeholders.
• Serve as a technical escalation point for complex infrastructure issues and enterprise support activities.

• Monitor enterprise infrastructure performance and system utilization trends.
• Conduct capacity planning and performance analysis for enterprise systems and datacenter environments.
• Recommend and implement infrastructure improvements to support scalability, reliability, and operational efficiency.
• Lead infrastructure modernization projects, including hardware refreshes, software upgrades, and enterprise technology implementations.
• Develop project plans, timelines, and implementation strategies for infrastructure initiatives.
• Research, evaluate, and recommend emerging infrastructure technologies and enterprise solutions.
• Ensure enterprise environments remain aligned with current security standards and supported technologies.
• Manage vendor relationships related to infrastructure hardware, software, maintenance, and support services.
• Maintain accurate technical documentation, operational procedures, and infrastructure standards.
• Support budget forecasting and infrastructure lifecycle planning activities.

• Bachelor’s degree in Computer Science, Engineering, Information Technology, or related technical field with 4+ years of relevant infrastructure engineering experience; OR
• Bachelor’s degree in any field with 8+ years of relevant infrastructure engineering experience; OR
• Equivalent combination of education and experience.
• 12+ years of experience supporting enterprise infrastructure operations, datacenter operations, or complex IT infrastructure environments.
• 12+ years of experience with enterprise systems monitoring, troubleshooting, operational support, and infrastructure management.
• 8+ years of experience leading infrastructure‑related projects, implementations, and technical coordination efforts.
• 8+ years of experience with infrastructure performance monitoring, capacity planning, and operational analysis.
• 8+ years of experience creating and maintaining technical documentation, operational procedures, and infrastructure standards.
• Experience working with cross‑functional infrastructure and enterprise support…