Senior VMware NSX Engineer

D2 Technical Services•Springfield, VA

10h•$150,000 - $165,000

About The Position

We are seeking an experienced Senior NSX Engineer to design, implement, operate, secure, and troubleshoot VMware NSX-based network virtualization solutions supporting a mission-critical U.S. Department of War environment. Candidates must possess an active Top Secret/SCI (TS/SCI) security clearance with a current CI Polygraph. The ideal candidate brings 5+ years of hands-on VMware NSX engineering experience, strong VMware vSphere and VMware Cloud Foundation (VCF) integration knowledge, and the ability to own the full NSX lifecycle from architecture and deployment through security hardening, automation, upgrades, and Tier 3 incident resolution.

Requirements

Active Top Secret/SCI (TS/SCI) security clearance with current CI Polygraph
Bachelor's degree in Information Technology, Computer Science, Engineering, Cybersecurity, or a related discipline; equivalent relevant experience may be substitute
5+ years of hands-on VMware NSX experience in enterprise-scale environments and 5+ years of VMware vSphere experience, including ESXi, vCenter Server, VDS, virtual networking, cluster operations, and troubleshooting
Advanced NSX-T / VCF Networking expertise: overlay/VLAN segments, Tier-0/Tier-1 gateways, Edge Nodes/clusters, BGP, static routing, ECMP, route redistribution, Distributed Firewall, Gateway Firewall, dynamic groups/tagging, NAT, VPN, DHCP, and lifecycle operations
Strong enterprise networking fundamentals: TCP/IP, DNS, DHCP, ARP, VLANs, VXLAN/Geneve, MTU, BGP, OSPF, VRFs, link aggregation, firewalling, NAT, load balancing, and network troubleshooting
Experience in DoW, federal civilian, intelligence community, or other highly regulated environments with formal change control, security approval, documentation, and audit requirements.
Working knowledge of RMF, ATO, DISA STIGs, POA&Ms, vulnerability management, security controls, continuous monitoring, and remediation of applicable security findings
Strong written and verbal communication skills, including technical diagrams, implementation plans, SOPs, security documentation, and executive-ready status updates.
Current CompTIA Security+ CE or another approved DoW 8140-aligned baseline certification appropriate to the assigned work role
One current VMware/Broadcom networking, security, or VMware Cloud Foundation certification, such as VCP-NV, VMware Cloud Foundation Administrator, VMware Cloud Foundation Architect, or a comparable current NSX/VCF networking certification.

Nice To Haves

Experience designing or supporting VMware Cloud Foundation, including SDDC Manager, workload domains, lifecycle management, vSphere, and NSX integration.
Experience integrating NSX with Cisco Nexus, Juniper, Palo Alto Networks, F5, or similar enterprise technologies
Experience with VXLAN/Geneve overlays, BGP underlay/overlay routing, multi-rack architectures, and highly available network services
Automation / Infrastructure as Code experience using PowerShell/PowerCLI, Ansible, VMware Aria Automation, REST APIs, Git, YAML, and JSON
Experience integrating NSX telemetry and logs with Splunk, Elastic, or comparable SIEM/observability platforms
Experience with enterprise PKI, certificate lifecycle management, Active Directory, LDAP, identity federation, RBAC, privileged-access management, and MFA
Experience supporting classified, disconnected, air-gapped, or tactical-edge environments
Familiarity with Dell PowerEdge, Cisco UCS, HPE, DISA STIG Viewer, SCAP scanning, ACAS/Nessus, and POA&M remediation workflows.

Responsibilities

Design, deploy, configure, operate, and sustain VMware NSX-T / VMware Cloud Foundation Networking across production, development, test, and mission environments.
Engineer NSX Manager clusters, transport nodes/profiles, transport zones, uplink profiles, VDS/N-VDS networking, and NSX Edge clusters.
Design and administer overlay and VLAN-backed segments, Tier-0/Tier-1 gateways, distributed routing, BGP, static routing, ECMP, route redistribution, and north-south/east-west connectivity.
Implement microsegmentation and Zero Trust-aligned controls using Distributed Firewall, Gateway Firewall, security groups, dynamic membership, tags, context profiles, and policy-based security.
Develop auditable, least-privilege firewall policies in coordination with cybersecurity, ISSO/ISSM, RMF, application, and network teams
Integrate NSX with vCenter, vSphere, VCF, vSAN, VMware Aria Operations/Logs, PKI, identity, SIEM, vulnerability-management, and enterprise monitoring platforms
Troubleshoot BGP/routing adjacency failures, MTU/TEP/Geneve issues, asymmetric routing, firewall processing, packet loss, performance degradation, and NSX Edge failures
Perform packet-level analysis using NSX CLI/nsxcli, vmkping, pktcap-uw, tcpdump-uw, Traceflow, flow monitoring, and distributed firewall analysis
Lead NSX upgrades, patching, certificate replacement, migrations, backup/recovery validation, and lifecycle-management activities with formal implementation, test, validation, and backout plans.
Maintain engineering standards, configuration baselines, diagrams, firewall matrices, runbooks, and as-built documentation; provide Tier 3 escalation support and mentor junior engineers.