• Support the administration and maintenance of LAN, WAN, and Datacenter network environments. • Configure, deploy, and troubleshoot network hardware including firewalls, routers, switches, load balancers, and wireless access points. • Work with technologies such as Cisco (Nexus, ACI), Palo Alto, F5 BIG-IP, and Arista. • Handle day-to-day operational tasks, including: Incident investigation and resolution, Change requests, Troubleshooting and remediation, Performance monitoring. • Participate in root cause analysis for network incidents and implement corrective actions. • Monitor network performance and ensure high availability of production systems. • Assist in network infrastructure projects (implementation, upgrades, migrations). • Support hardware/software upgrades and patching activities. • Maintain accurate documentation of configurations, network diagrams, procedures, and inventory. • Follow network security best practices and support audit/compliance activities. • Participate in rotational on-call support for critical systems (24/7 environment).

Role Description The Senior Network Engineer (Tier 3) is responsible for designing, operating, and optimizing high-performance data center networks that power large-scale AI/ML and cloud infrastructure. Acts as the escalation point for complex network issues, driving deep technical troubleshooting, automation, and reliability improvements across multi-site, high-throughput environments. Qualifications - Act as a Tier 3 (L3) escalation point for complex network incidents, providing deep technical troubleshooting and root cause analysis beyond Tier 1/2 support. - Partner with Network Operations (Tier 1/2) teams to resolve escalated issues, improve runbooks, and reduce recurring incidents through automation and systemic fixes. - Lead resolution of critical, high-impact network incidents affecting AI/ML workloads, data center operations, and customer environments. - Develop and refine operational procedures, playbooks, and escalation paths to enhance efficiency across Tier 1/2/3 support models. - Identify opportunities to shift-left operational knowledge by mentoring junior engineers and improving observability and tooling. - Maintain accurate network documentation, diagrams, and design standards, supporting compliance and audit requirements. - Optimize network performance for distributed training workloads, including tuning for large flows, incast, and burst traffic patterns. - Support RDMA/RoCEv2 or InfiniBand environments (if applicable), including PFC, ECN, and lossless fabric tuning. - Automate network provisioning, configuration management, and remediation using Python, Ansible, Terraform, or similar tools. Company Description IREN is a leading AI Cloud Service Provider, delivering large-scale GPU clusters for AI training and inference. IREN’s vertically integrated platform is underpinned by its expansive portfolio of grid-connected land and data centers in renewable-rich regions across the U.S. and Canada. With 100% renewable energy, we build, own and operate our data centers and take pride in being at the forefront of sustainable solutions for the ever-evolving applications of high-performance compute. We believe that human progress is invaluable, but it should be done in the right way – responsibly, sustainably and having a positive impact on the communities we operate in.

Title: Team Lead, Network Services (Hybrid) Location: Stamford United States Job Description: This role is based in Stamford, CT and work a hybrid schedule. Remote work must take place in CT, NY, or NJ. JOB SUMMARY: Reporting to the Infrastructure Services Manager, the Technical Team Lead serves as the chief engineer and architect for Stamford Hospital's voice and network infrastructure environment. This role involves planning, designing, implementing, and supporting all network services and technologies, including the organization’s telephony and network systems, routing and switching equipment, Internet services, remote access solutions, and perimeter network security services. The Technical Team Lead is responsible for designing and executing projects that achieve Stamford Health’s goals and objectives. The Technical Team Lead recommends and implements new technologies and processes to improve workflow and efficiency while reducing downtime and costs. The Technical Team Lead collaborates with the Infrastructure Services Manager to develop and implement technology and team strategies, identify and act on opportunities proactive maintenance and upgrades, and report on infrastructure growth and requirement changes. CRITICAL RESPONSIBILITIES: • Provide technical leadership in designing and implementing enterprise network solutions using Cisco routing, switching, and wireless platforms. • Architect and maintain secure network environments leveraging Fortinet firewalls, VPNs, and security services. • Act as the senior escalation point for complex network and security issues, problem isolation and resolution lead. • Manage and optimize enterprise wireless networks using Cisco access points and controllers. • Implement and maintain routing protocols (BGP, OSPF, EIGRP) and advanced switching technologies (VLANs, STP, VPC). • Collaborate with cybersecurity teams to enforce segmentation, zero trust principles, and compliance requirements. • Oversee network monitoring, performance tuning, and capacity planning using enterprise tools. • Ensure high availability through redundancy design, failover testing, and disaster recovery planning. • Lead and deliver infrastructure projects aligned with organizational goals and timelines. QUALIFICATIONS/REQUIREMENTS: • Bachelor’s degree preferred or equivalent work experience • 8–12+ years of enterprise network engineering experience. • 2–3+ years of technical team lead experience preferred. TECHNICAL SKILLS: • Expert hands-on knowledge of Cisco routing and switching (Catalyst, Nexus, ISR, ASR platforms). • Hands-on Cisco wireless technologies (WLC, access points, RF design) expertise. • Deep understanding of routing protocols (BGP, OSPF, EIGRP). • Hands-on expertise with Fortinet firewalls (FortiGate) and security features. • Strong knowledge of network security (VPNs, IPSec, SSL VPN, segmentation). • Experience with VoIP technologies (Cisco Call Manager, SIP). • Familiarity with network monitoring and troubleshooting tools. • Working knowledge of network automation (Python, Ansible) is a plus. CERTIFICATIONS (Preferred): • CCNP or CCIE (Routing & Switching / Enterprise / Wireless) • Cisco Wireless certifications • Fortinet NSE certifications (NSE4 or higher) LEADERSHIP SKILLS: • Strong communication and customer service skills. • Proven ability to mentor and develop engineering teams. • Ability to manage multiple projects and priorities effectively. • Hands-on leadership with strong problem-solving skills. WORK ENVIRONMENT: • Onsite site hands-on work required • On-call rotation required • The ability to lift equipment up to 50lbs required • Evening, nights and weekend work required as needed At Stamford Health, we believe that every patient deserves compassionate, personalized, person‑centered care. This commitment guides how we care for patients, support their care partners, and promote the wellbeing of our staff. In alignment with our Planetree philosophy, the individual in this role will foster a respectful, collaborative environment that honors the needs, values, and preferences of every person we serve and the colleagues we partner with. Apply Now Job Info - Job Identification5759 - Job Category300 - Professional - Job ScheduleFull time - Job ShiftDay - Locations 3001 Summer St. , Stamford, CT, 06905, US

• Provides technical and analytical support by serving as a specialist for networking • Work includes the design, review of internal and external infrastructure requirements • Serves as expert on complex networks including serving as a resource to the SOC • Configures and manages central network components • Works with SOC to establish policies and procedures for managing the network • Stays current with new technologies, with a focus on routing, switching, wireless and security technology • Prepares and maintains detailed network documentation • Configures and manages security perimeter devices • Performs other duties as assigned