Routing and Switching Engineer (LAN,B2B, ACI DC)

Job Description

Job Purpose:

The Level 3 Network Operations Engineer is a senior technical authority responsible for overseeing the stability, performance, and optimization of the organization’s enterprise network infrastructure. The role requires extensive hands-on experience in routing and switching technologies across LAN, SD-WAN, Internet, DMZ, B2B, and ACI Data Center environments. This engineer is expected to handle complex incidents, lead root cause analysis, and guide architectural decisions.

Key Responsibilities & Duties

• Network Infrastructure Oversight: Manage and optimize routing, switching, and interconnectivity across LAN, WAN, DMZ, B2B, and cloud environments. Ensure availability, performance, and security of network services supporting critical business applications
• Advanced Troubleshooting: resolve complex technical issues spanning Layer 1–4. Lead root cause analysis and long-term corrective action planning
• Design & Implementation: Participate in network design reviews and implement enterprise-grade network infrastructure (ACI, SD-WAN, etc.). Evaluate and integrate new networking technologies to improve resilience and performance
• Network Change Management: Execute and oversee network configuration changes, migrations, and upgrades in compliance with change control policies. Ensure minimal downtime and risk to production systems
• Monitoring & Optimization: Proactively monitor network performance using tools like SNMP, NetFlow, and telemetry. Analyze trends and implement tuning strategies to enhance throughput and reduce latency
• Documentation & Standards: Maintain up-to-date documentation of network diagrams, configurations, and operational procedures. Ensure network practices align with internal standards and regulatory requirements
• Collaboration & Mentorship: Collaborate with security, infrastructure, and application teams on end-to-end service delivery. Provide guidance and knowledge transfer to Level 2 engineers and junior staff
  
  

Skills & Qualifications

• Expert-level knowledge in routing protocols (OSPF, BGP, EIGRP), switching (VLANs, STP, VTP), and IP addressing
• Strong hands-on experience with Cisco technologies, including ACI Data Center and SD-WAN platforms
• Proficient in DMZ, B2B, and internet gateway configuration and operations
• Solid understanding of network segmentation, redundancy, and HA principles
• Strong diagnostic and analytical skills, especially under high-pressure situations
• Excellent documentation and communication skills
  
  

Education & Certifications

• Bachelor’s Degree in Network Engineering, Computer Science, or related field
• Preferred certifications:
• - Cisco CCNP or CCIE (Enterprise or Data Center track)
• - SD-WAN certifications (Cisco, Viptela)
• - ACI or Nexus-related training
  
  

Working Conditions

• May require occasional data center and branch office visits
• Must be available for critical issue resolution and planned changes during off-hours
• Regular interaction with cross-functional technical teams
  
  

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