Job Title: Network Security Consultant

Shef Solutions LLC; Indiana; On-site; USD 120,000 - 170,000; Full time

Job summary

Shef Solutions LLC in Indiana seeks an experienced Level 3 Network Engineer to design, deploy, and support large-scale LAN/WAN and SD-WAN networks. You will work hands-on with Cisco ACI, focusing on performance, reliability, and secure infrastructure management.

The role requires 10+ years in network engineering, strong routing and switching skills, security knowledge, and the ability to lead incident resolution while documenting changes and coordinating with security, infra, and app teams.

Qualifications

• Minimum 10+ years in network engineering with escalating responsibilities.
• Hands-on Cisco ACI experience including configuration and troubleshooting.
• Strong LAN/WAN, routing, switching and SD-WAN expertise.
• Solid understanding of network security and monitoring tools.
• CCNP/CCIE or equivalent certification required.

Responsibilities

• Design, implement, and support enterprise LAN/WAN and SD-WAN networks.
• Troubleshoot Cisco ACI fabric and maintain network operations.
• Analyze performance, optimize traffic, and plan capacity.
• Lead high-priority incident resolution and root-cause analysis.
• Maintain documentation, diagrams, SOPs, and change logs.
• Collaborate with security, infra, and application teams.
• Ensure security best practices across network layers.
• Support SLAs and service delivery during changes.

Skills

LAN/WAN expertise

SD-WAN

Cisco ACI

Routing & Switching

Network security concepts

Incident resolution

Documentation & communication

10+ years experience

Education

CCNP or CCIE certification

Tools

Monitoring platforms

Job description

Position OverviewWe’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

Position OverviewWe’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 optimization
• Lead 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