Senior Network Engineer - IPv6

Role: Senior Network Engineer IPv6

Location: Herndon, VA (100% On-site)

Job Type: 6 months Contract

BizTech Fusion is hiring a Senior Network Engineer IPv6 for one of our clients.

We are seeking an experienced and highly skilled Senior Network Engineer with strong expertise in IPv6 technologies, dual-stack environments, multicast routing, and Cisco networking platforms . This role will play a key part in assessing, designing, testing, and implementing IPv6 solutions while supporting the organization's transition to next-generation networking infrastructure.

Key Responsibilities

IPv6 Network Assessment

• Evaluate existing network infrastructure to determine IPv6 readiness across routers, switches, firewalls, and endpoints.
• Identify gaps in current IPv4 environments and recommend migration strategies.
• Assess hardware and software compatibility for IPv6 support.
• Review network topologies and provide detailed recommendations for IPv6 adoption.

Network Design & Architecture

• Design scalable IPv4/IPv6 dual-stack network solutions.
• Develop IPv6 addressing and routing strategies.
• Design and implement multicast routing architectures.
• Create high-level and low-level network design documentation, including diagrams, routing policies, and IP allocation plans.
• Collaborate with security, infrastructure, and application teams to ensure end-to-end IPv6 compatibility.

Testing & Implementation

• Develop and execute IPv6 testing plans for deployment scenarios.
• Conduct proof-of-concept (PoC) and lab testing prior to production implementation.
• Validate routing protocols, multicast functionality, and network performance.
• Troubleshoot complex network issues and perform root cause analysis.
• Develop migration, rollback, and change management procedures for production deployments.

Technical Leadership

• Serve as the subject matter expert (SME) for IPv6 and multicast technologies.
• Mentor junior engineers and share best practices.
• Participate in technical reviews and provide recommendations for network changes and improvements.

Required Qualifications

• 7+ years of progressive experience in network engineering within enterprise or service provider environments.
• Strong hands-on experience with IPv6 addressing, routing, deployment, and migration strategies.
• Proven expertise designing and supporting IPv4/IPv6 dual-stack networks.
• Experience with multicast routing technologies including:
  • PIM-SM
  • IGMP
  • MLD
• Strong knowledge of routing protocols including:
  • OSPFv2
  • OSPFv3
  • BGP (including IPv6 address families)
• Hands-on experience with Cisco routing and switching platforms.
• Ability to create professional network assessment reports, design documents, and test plans.
• Cisco CCNP certification or equivalent industry experience.

Preferred Qualifications

• Cisco CCIE certification (Enterprise Infrastructure or Service Provider).
• Experience with network automation tools such as Python or Ansible.
• Knowledge of SNMP, NetFlow, and network monitoring solutions in IPv6 environments.
• Experience implementing security controls and access policies within dual-stack networks.
• Experience supporting large-scale IPv6 migration projects.
• Familiarity with federal, regulatory, or compliance-driven networking environments.

Education

Bachelor's degree in Computer Science, Information Technology, Network Engineering, or a related field, or an equivalent combination of education and relevant experience.

Work Location

On-site, five days per week.

Ideal Candidate Profile

The ideal candidate will be a senior-level network engineer with extensive experience in IPv6 networking, Cisco technologies, routing and switching, multicast protocols, dual-stack architectures, and enterprise network design , capable of leading complex infrastructure modernization initiatives from assessment through implementation.