Senior Network Engineer

Description Join the Leidos Homeland Sector and contribute to a high-impact international program delivering secure, next-generation private cloud capabilities within a NATO-secured environment. This senior-level role offers the opportunity to apply deep technical expertise to the design, integration, and hands-on implementation of enterprise networking solutions supporting a Software-Defined Data Center (SDDC). You will help deliver secure, resilient, and automated network infrastructure across Enterprise Core Services (ECS), Client Provisioning Services (CPS), Infrastructure as a Service (IaaS), and Service Management Control (SMC). Working closely with infrastructure, virtualization, cybersecurity, and DevOps teams, you will support the full delivery lifecycle-from solution design and integration through site deployment, testing, and customer acceptance. This position offers an exciting opportunity to work directly with international customers and technical partners, with approximately 25% travel to The Hague, Netherlands, and other NATO locations as needed to support solution integration, implementation, testing, and customer acceptance. It is an ideal opportunity for a senior engineering leader interested in advancing mission-critical cloud capabilities while gaining valuable international program experience. Responsibilities: - Lead the design, integration, and hands-on implementation of enterprise network solutions supporting private cloud SDDC modernization initiatives. - Design and implement automated deployment of Layer 2/Layer 3 enterprise network architectures supporting VMware-based private cloud environments. - Develop and integrate Software-Defined Networking (SDN) solutions using Cisco ACI, VMware NSX, and ancillary datacenter technologies. - Design secure network architectures supporting Enterprise Core Services (ECS), Client Provisioning Services (CPS), Infrastructure as a Service (IaaS), DevOps platforms, and Service Management Control (SMC). - Collaborate with infrastructure, virtualization, cybersecurity, and DevOps engineering teams to integrate enterprise networking capabilities. - Develop network automation solutions using Infrastructure as Code (IaC), Ansible, Python, Terraform, or similar automation technologies. - Integrate Commercial Off-The-Shelf (COTS) networking solutions into secure enterprise environments. - Develop and maintain network architectures, engineering designs, implementation plans, technical procedures, and configuration documentation. - Participate in Agile development activities including sprint planning, technical reviews, design governance, and cross-functional engineering collaboration. - Mentor engineers and provide technical guidance on enterprise networking standards, automation practices, and secure network design. - Travel to NATO sites to install, configure, integrate, test, and validate enterprise networking solutions, supporting deployment, commissioning, troubleshooting, and customer acceptance activities. - Support infrastructure modernization initiatives, technical planning, and proposal development activities. Required Experience, Skills, and Education: - Bachelor's degree in Computer Science, Information Technology, Engineering, or related discipline with 8-12 years of relevant experience, or Master's degree with 6-10 years of relevant experience. - Active NATO Secret clearance (or higher). - Demonstrated experience designing and implementing enterprise routing, switching, and Software-Defined Networking (SDN) solutions. - Strong experience with Cisco enterprise networking technologies, including Cisco ACI. - Experience with VMware NSX or equivalent network virtualization technologies. - Experience designing and integrating enterprise network solutions supporting private cloud or hybrid cloud environments. - Extensive experience implementing network automation using Infrastructure as Code (IaC), Ansible, Terraform, Python, or similar technologies. - Strong understanding of enterprise networking, network segmentation, routing protocols, switching, load balancing, DNS, and IP services. - Strong understanding of secure network architecture, Zero Trust principles, and enterprise cybersecurity practices. - Experience operating within Agile, SAFe, or DevSecOps delivery frameworks. - Strong leadership, communication, stakeholder engagement, and technical collaboration skills. - Experience supporting defense, government, or highly regulated development environments. Preferred Experience, Skills, and Education: - Cisco Certified Network Professional (CCNP), Cisco Certified Internetwork Expert (CCIE), or equivalent certification. - VMware NSX certification or equivalent SDN certification. - Experience supporting NATO environments and compliance frameworks. - Experience with F5 load balancing technologies. - Experience with enterprise network monitoring, automation, and orchestration platforms. - Familiarity with Python, REST APIs, and network programmability. - Experience supporting large-scale infrastructure modernization and enterprise platform engineering initiatives.