Job Title: Network Security Consultant

Shef Solutions LLC; Indiana (PA); On-site; USD 120,000 - 180,000; Full time

Job summary

Shef Solutions LLC is seeking an experienced Level 3 Network Engineer with deep expertise in LAN, WAN, security, and SD-WAN environments. The role focuses on hands-on engineering to ensure performance, reliability, and secure infrastructure management within enterprise networks.

The ideal candidate will design, implement, and support enterprise-grade networks, administer Cisco ACI fabric, analyze performance, and lead incident resolution with root-cause analysis.

Qualifications

• 10+ years in network engineering with progressive responsibilities.
• Strong LAN/WAN, routing, switching, and SD-WAN expertise.
• Hands-on Cisco ACI experience for design and ops.
• Solid network security knowledge and tooling.
• CCNP or CCIE certification required.

Responsibilities

• Design and support enterprise LAN/WAN and SD-WAN networks.
• Administer Cisco ACI fabric, monitor and troubleshoot.
• Analyze performance, traffic engineering, and optimization.
• Lead incident resolution and root cause analysis.
• Maintain network diagrams, SOPs, and change logs.
• Collaborate with security, infrastructure and apps teams.
• Ensure security best practices across layers.
• Participate in capacity planning and upgrades.
• Support change management and SLAs.

Skills

LAN/WAN

SD-WAN

Cisco ACI

Network security

Troubleshooting

Documentation

Communication

CCNP/CCIE

Job description

Position Overview

We’re looking for an experienced Level 3 Network Engineer with deep technical expertise in LAN, WAN, security, and SD‑WAN environments. The right candidate will bring a solid background in Cisco ACI (Application Centric Infrastructure) and have a proven track record of supporting complex enterprise network environments. This is a hands‑on engineering role focused on performance, reliability, and secure infrastructure management.

Key Responsibilities

• Design, implement, and support enterprise‑grade LAN/WAN and SD‑WAN networks
• Administer and troubleshoot Cisco ACI fabric, ensuring smooth network operations
• Perform network performance analysis, traffic engineering, and optimizationLead incident resolution for escalated network issues and perform root cause analysis
• Maintain strong documentation including network diagrams, SOPs, and change logs
• Collaborate with cross‑functional teams including security, infrastructure, and application teams
• Ensure security best practices are applied across all network layers
• Participate in capacity planning and infrastructure upgrades
• Support change management and service delivery within established SLAs

Required Skills & Qualifications

• 10+ years of experience in network engineering roles with increasing responsibilities
• Strong technical expertise in LAN/WAN, routing, switching, and SD‑WAN technologies
• Hands‑on experience with Cisco ACI environments (configuration, monitoring, troubleshooting)
• Solid understanding of network security concepts and tools
• Familiarity with enterprise monitoring and management platforms
• Excellent troubleshooting skills and the ability to handle high‑priority incidents independently
• Strong communication and documentation skills
• Relevant certifications such as CCNP, CCIE, or equivalent needed