Network Performance Engineer | Netscout

IS3 is seeking an experienced Network Performance Engineer with deep expertise in Netscout technologies to join its Denver-based infrastructure team. This role is critical to maintaining the health and performance of the client's enterprise network, supporting day-to-day infrastructure operations, and designing and implementing advanced dashboards that provide real-time visibility into network performance. The ideal candidate brings hands-on Netscout experience, a strong foundation in network engineering, and a knack for translating data into actionable visual insights.

Key Responsibilities

Network Infrastructure Support

• Monitor, support, and troubleshoot the client's enterprise network infrastructure using Netscout nGeniusONE and InfiniStream platforms
• Serve as a subject matter expert (SME) for Netscout tools, providing Tier 2/3 support for network performance incidents
• Identify and resolve network anomalies, packet loss, latency, and application performance degradation
• Collaborate with NOC, network engineering, and applications teams to correlate performance data and drive root-cause analysis
• Maintain and optimize Netscout probe and InfiniStream appliance deployments across key network segments
• Support change management activities, ensuring network changes are validated with pre/post performance comparisons

Dashboard Design & Implementation

• Design, build, and maintain real-time performance dashboards within nGeniusONE and other visualization platforms (e.g., Grafana, Splunk, or similar)
• Translate network KPIs and SLA metrics into intuitive, executive-ready dashboards for IT leadership and operations teams
• Develop custom views, reports, and alerts that enable proactive identification of performance trends and capacity issues
• Work closely with stakeholders to gather requirements and iterate dashboard designs based on operational feedback
• Document dashboard standards, data sources, and refresh processes for ongoing maintainability

General Engineering Responsibilities

• Participate in capacity planning and performance baselining efforts
• Contribute to network architecture discussions, providing performance data to support infrastructure investment decisions
• Author and maintain runbooks, SOPs, and technical documentation
• Support on-call rotation and participate in major incident response as needed

Required Qualifications

• 3+ years of hands-on experience with Netscout platforms (nGeniusONE, InfiniStream, nGenius Pulse, or ASI)
• Strong working knowledge of network protocols: TCP/IP, BGP, OSPF, MPLS, QoS, VLANs
• Experience with packet capture analysis and deep packet inspection (DPI) tools
• Demonstrated ability to design and implement network performance dashboards
• Proficiency troubleshooting Layer 2-7 network issues in large enterprise or service provider environments
• Experience with SNMP, NetFlow/IPFIX, and syslog integration for monitoring and alerting
• Strong analytical and communication skills; ability to present technical findings to non-technical audiences
• Bachelor's degree in Computer Science, Information Technology, or equivalent work experience

Preferred Qualifications

• Experience in a cable, telecom, or large ISP/MSO environment
• Familiarity with additional monitoring tools: SolarWinds, ThousandEyes, Grafana, or AppDynamics
• Scripting/automation skills (Python, Ansible, or Bash) to enhance monitoring workflows
• Cisco CCNP, CCIE, or equivalent industry certification
• Experience with SD-WAN, cloud networking (AWS/Azure), or hybrid network environments
• Knowledge of ITSM platforms (ServiceNow) and ITIL processes

Work Arrangement

This is a hybrid position based in Denver, Colorado. Candidates are expected to be onsite at the client's Denver offices 3-4 days per week. Remote work is permitted on remaining days. Candidates must be local to the Denver metro area or willing to relocate prior to start date.