Network Infrastructure Engineer

Network Infrastructure Engineer

We are seeking a highly skilled Network Infrastructure Engineer to support and enhance enterprise networking environments within a government and large-scale enterprise context. This role involves designing, deploying, and maintaining modern data center, campus, identity-driven access, and network observability solutions, ensuring reliable, secure, and scalable network services aligned with modernization initiatives.

Key Responsibilities

• Designs, implements, and supports Cisco ACI fabric components, including VRFs, Bridge Domains, EPGs, ESGs, L3Outs, contracts, and fabric policies, ensuring optimal data center network performance.
• Configures and maintains Cisco Nexus platforms operating in ACI mode, troubleshooting fabric health, endpoint learning, segmentation, and multi-tenant environments.
• Integrates Cisco ACI with virtualization and container platforms such as Red Hat OpenShift and Cilium/Isovalent environments to support modern application deployment.
• Configures and optimizes RoCEv2 for high-performance, low-latency workloads across data center networks.
• Deploys, manages, and supports Cisco Catalyst switching platforms and designs Cisco Software-Defined Access (SDA) environments, including wired and wireless fabric deployments.
• Manages SDA underlay and overlay networks, including authentication integrations, policy enforcement, and assurance operations.
• Configures and administers Cisco Identity Services Engine (ISE), including TACACS+, endpoint profiling, and security policy management.
• Integrates Cisco Cyber Vision into network access control, segmentation, and asset visibility strategies to support security initiatives.
• Deploys and manages Cisco ThousandEyes, Cisco Cyber Vision, and Cisco DNA Spaces for network performance monitoring, OT/IoT asset discovery, and location analytics.
• Troubleshoots complex Layer 2 and Layer 3 networking issues involving VLANs, OSPF, BGP, STP, multicast, and related technologies.
• Supports enterprise security solutions, including Palo Alto Networks firewalls, and maintains network architecture diagrams, standards, and operational documentation.
• Participates in technology modernization efforts, platform upgrades, procurement activities, and statewide infrastructure initiatives.

Required Qualifications

• 15+ years of experience in enterprise network engineering.
• Extensive hands-on experience with Cisco ACI in production environments.
• Deep understanding of ACI architecture, including VRFs, Bridge Domains, EPGs, ESGs, L3Outs, and contracts.
• Experience integrating Cisco ACI with OpenShift, virtualization platforms, and container networking.
• Strong expertise with Cisco Catalyst switching and Software-Defined Access (SDA).
• Experience administering Cisco Identity Services Engine (ISE), including TACACS+ and policy-based network access control.
• Knowledge of Cisco ThousandEyes, Cisco Cyber Vision, Cisco DNA Spaces, or similar observability platforms.
• Advanced understanding of TCP/IP, routing, switching, QoS, network security, and enterprise networking best practices.
• Experience supporting Palo Alto Networks firewalls and security technologies.
• Ability to troubleshoot complex network issues and produce detailed documentation.

Preferred Qualifications

• Cisco certifications such as CCNP Enterprise, CCNP Data Center, CCIE Enterprise Infrastructure, or CCIE Data Center.
• Palo Alto certifications including PCCSA or PCNSA.
• Experience with network automation tools like Python, Ansible, REST APIs, or Infrastructure as Code.
• Familiarity with container networking and virtualization platforms.
• Knowledge of NIST cybersecurity frameworks and government security standards.
• Prior experience supporting state government, public sector, or large enterprise environments.

Delphi-US is a national IT Services firm based in Newport, Rhode Island. Delphi attracts our nation's best and brightest Technical & Professional Talent and positions our nation's finest employers to further their competitive advantages. Delphi's core technical focus includes Data Sciences & Analytics, Modern AI/ML Model Monetization, Cloud Engineering, Cyber Security, ERP Rescue; serving domains from sensitive national energy sectors to critical financial services, biomed, lifesciences & pharma, major government & municipal institutions, and much of the USA's Fortune 500 corporations. Delphi Associates are deployed on critical IT Projects where their consultative business acumen, comprehensive technical expertise, and committed service mission drives our client's success. Our proprietary skill-based and cultural matching process results in higher qualified project teams, custom curated for our client's specific technical & functional goals. We are supremely experienced, friendly, professional, and ready to advocate on your behalf. Delphi has an indelible understanding of employer expectations, a track record of project success and we deliver lasting results. 6142