Network Infrastructure Engineer

Network Infrastructure Engineer Onsite Description: Diversified Systems is searching for a Network Infrastructure Engineer to support and advance the Information Technology's enterprise networking environment. This position plays a critical role in designing, deploying, and operating the (LDC) fabrics, networks, identity-driven access systems, and observability platforms. The engineer will work closely with the infrastructure team to ensure the State's network services remain reliable, scalable, secure, and aligned with enterprise modernization goals. This is a hands-on engineering position that requires strong technical expertise, effective communication, and the ability to support mission-critical systems across data centers and statewide operations. Responsibilities: Cisco ACI & Data Center Networking Design, implement, and maintain Cisco Nexus platforms running ACI mode, including VRFs, Bridge Domains, EPGs/ESGs, L3Out, contracts, and fabric policies. Integrate ACI with virtualization and container platforms including Red Hat OpenShift VMM and Isovalent/Cilium. Configure and optimize RoCEv2 within the ACI fabric for high-performance, low-latency workloads. Conduct advanced troubleshooting of ACI fabric health, faults, endpoint learning, contracts, and multi-tenant segmentation. Develop and maintain fabric documentation, standards, and operational procedures. Cisco Catalyst & Software-Defined Access Deploy and support Cisco Catalyst platforms within campus environments. Design and maintain Software-Defined Access (SDA) architectures, including SDA Wired Fabric and Fabric-Enabled Wireless. Manage fabric underlay and overlay, policy mapping, authentication integrations, and assurance operations. Collaborate with wireless engineers to optimize coverage, performance, and policy enforcement across SDA. Identity-Driven Networking & Security Technologies Configure and administer Cisco Identity Services Engine (Client) for TACACS+ device administration, authentication and authorization policy sets, and endpoint profiling. Integrate Cyber Vision intelligence into profiling, segmentation, and access control workflows. Support Zero Trust efforts through identity-centric segmentation and policy integration across ACI and SDA fabrics. Visibility, Analytics & Observability Deploy and manage ThousandEyes for end-to-end visibility, routing path analysis, and performance monitoring. Implement and support Cisco Cyber Vision for OT/IoT asset visibility, device classification, and behavior analysis. Manage DNA Spaces for location analytics, telemetry ingestion, device behavior, and wireless intelligence. Provide meaningful insights to leadership using data from these observability platforms. Core Network Engineering Troubleshoot complex L2/L3 network issues across multiple environments including VLANs, OSPF, BGP, STP, and multicast. Design and implement Palo Alto Networks security solutions across enterprise environments. Create and maintain documentation including architecture diagrams, standards, runbooks, and asset inventories. Assist in modernization planning, platform upgrades, procurement processes, and statewide technology initiatives. Perform other duties as assigned. Requirements: 15 years of experience working with Cisco networking required. Hands-on experience with Cisco ACI in production environments required. Deep knowledge of ACI constructs including VRF, Client, EPG, ESG, L3Out, and contracts required. Experience integrating ACI with OpenShift VMM and Cilium/Isovalent required. Proficiency with Cisco Catalyst platforms and SDA fabric technologies required. Experience administering Cisco Client including TACACS+ and policy-set-based NAC required. Strong understanding of ThousandEyes, Cyber Vision, and DNA Spaces or comparable tools required. Solid command of core TCP/IP, routing, switching, QoS, and network security fundamentals required. Ability to develop clear diagrams, documentation, and architectural artifacts required. Strong analytical and communication skills with the ability to work in fast-paced, mission-critical environments required. Highly Desired Skills: Cisco certifications such as CCNP Data Center, CCNP Enterprise, CCIE, or equivalent experience highly desired. Hands-on experience with container networking and virtualization integrations highly desired. Familiarity with NIST frameworks and state-level cybersecurity requirements highly desired. Experience with network automation tools including Python, Ansible, and REST APIs highly desired. Prior work in state government or large enterprise network environments highly desired. Palo Alto Networks Certified Cybersecurity Associate (PCCSA) certification highly desired. Palo Alto Networks Certified Network Security Administrator (PCNSA) certification highly desired. About Diversified Systems Founded in 1990, Diversified Systems is an award-winning Technology Services corporation providing all levels of IT project consulting services nationwide. DSI is headquartered in Columbus, Ohio with regional offices in the American Midwest and East Coast. We offer our consultants a number of flexible and competitive compensation benefit packages. Diversified Systems is committed to the principles of equal employment. We are committed to complying with all federal, state, and local laws providing equal employment opportunities, and all other employment laws and regulations. Diversity, Equity and Inclusion DSI values authenticity and is committed to making sure our employees and partners are valued and respected. At DSI, we believe building a diverse culture is important because we know when people work together, we can achieve better results as a team. DSI realizes that everyone comes from various backgrounds. We celebrate these differences because our employees are our greatest asset as we strive to best meet the needs of those we serve. As part of our ongoing efforts, DSI is focused on advancing equality, diversity, and inclusion by setting high standards to continually evolve our culture. This includes but is not limited to recruiting, community involvement, client delivery, and career development. Diversified Systems, Inc.