Network Performance Engineer with Security Clearance

Agensys 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 enterprise network while designing and implementing advanced dashboards that provide real-time visibility into network performance.

Key Responsibilities

• Monitor, support, and troubleshoot enterprise network infrastructure using Netscout nGeniusONE and InfiniStream
• Serve as the Netscout SME, providing Tier 2/3 support for network performance incidents
• Identify and resolve network anomalies, packet loss, latency, and application performance issues
• Partner with NOC, network engineering, and application teams to perform root cause analysis
• Maintain and optimize Netscout probe and appliance deployments
• Support change management and validate network changes with performance analysis
• Design and maintain real-time performance dashboards
• Develop custom reports, alerts, and visualizations to proactively identify trends and capacity concerns
• Participate in capacity planning, documentation, and on-call support activities Required Qualifications:
• 3+ years of hands-on Netscout experience (nGeniusONE, InfiniStream, nGenius Pulse, or ASI)
• Strong knowledge of TCP/IP, BGP, OSPF, MPLS, QoS, and VLANs
• Experience with packet capture analysis and deep packet inspection (DPI)
• Ability to design and implement network performance dashboards
• Experience troubleshooting Layer 2-7 issues in large enterprise or service provider environments
• Knowledge of SNMP, NetFlow/IPFIX, and syslog integrations
• Strong communication and analytical skills Nice to Have:
• Cable, telecom, or ISP/MSO experience
• SolarWinds, ThousandEyes, Grafana, or AppDynamics
• Python, Ansible, or Bash scripting
• Cisco CCNP / CCIE
• SD-WAN, AWS/Azure networking, or hybrid cloud experience
• ServiceNow and ITIL familiarity