Senior Network Engineer (Gc-3)

Legato, LLC•Annapolis Junction, MD

14d•$200,000 - $235,000

About The Position

The Senior Network Engineer will support the design, implementation, administration, maintenance, and modernization of complex enterprise network infrastructure. The role focuses on network architecture, performance optimization, technical documentation, and integration of advanced technologies, including Software-Defined Networking (SDN), VMware NSX, data center networking, and hybrid-cloud solutions. The engineer will analyze existing network environments, develop network diagrams, document configurations and connectivity, and identify ways to improve performance, security, and reliability. During the initial 90–120 days, the work will focus primarily on network discovery, documentation, and assessment, including evaluating network policies and identifying configuration gaps in access control lists, segmentation, and routing. After the initial assessment, the engineer will support SDN architecture and implementation, engineer VMware NSX environments, assist with storage and backup infrastructure, and contribute to hybrid-cloud architecture solutions. The role also covers LAN, CAN, and WAN design and optimization; network-device integration; infrastructure upgrades; and troubleshooting complex connectivity and performance issues. The engineer will collaborate with systems engineers, network administrators, and other technical teams to develop network designs, evaluate system requirements, and implement scalable infrastructure. The position calls for strong network engineering and documentation skills, the ability to independently assess complex environments, and the ability to provide technical guidance to junior engineers. The position is in Fort Meade, Maryland, and requires an active TS/SCI clearance with polygraph.

Requirements

Ten years of relevant professional experience providing Network Engineering support.
Master's degree in Computer Science, Information Assurance, Information Security Systems Engineering, or a related technical discipline; alternatively, a bachelor's degree in Systems Engineering, Computer Science, Information Systems, Engineering Science, Engineering Management, or a related discipline plus two additional years of Network Engineering experience may substitute for the master's degree.
Active IAT Level II / DoD 8570-compliant certification, such as Security+.
Strong experience developing and maintaining detailed network diagrams, technical documentation, network configurations, and architecture documentation.
Experience designing, implementing, administering, maintaining, and upgrading enterprise network infrastructure.
Experience administering LAN, CAN, and WAN networks, including network conversions, cutovers, and infrastructure modernization.
Experience with network policies, ACLs, network segmentation, and routing.
Experience analyzing network configurations, identifying technical gaps, and recommending improvements to network security and performance.
Experience configuring, integrating, deploying, testing, and maintaining network devices and supporting infrastructure.
Experience optimizing end-to-end network performance, minimizing latency, and maximizing data throughput.
Experience performing network data captures, analyzing performance metrics, and troubleshooting complex network issues.
Experience configuring and optimizing connectivity between front-end and back-end systems.
Experience developing technical network solutions involving load balancing, VPNs, firewalls, GRE tunneling, IPsec, IP encryption, VoIP traffic shaping, and NAT.
Experience using network monitoring, diagnostic, and troubleshooting tools.
Active TS/SCI clearance with polygraph.

Nice To Haves

Experience with VMware NSX and software-defined data center networking.
Knowledge of SDN architecture, technologies, and implementation.
Experience with data center networking, virtualization, and network infrastructure modernization.
Familiarity with storage systems, backup technologies, and supporting infrastructure.
Experience with hybrid-cloud architecture, cloud networking, and infrastructure integration.
Experience evaluating existing network environments and developing network modernization recommendations.
Experience supporting large-scale enterprise network architectures and infrastructure upgrades.
Strong technical documentation skills, including proficiency with network diagramming tools.
Experience developing network architecture solutions that support scalability, security, and operational efficiency.
Strong analytical and problem-solving skills, with the ability to independently assess network environments and recommend effective technical solutions.

Responsibilities

Design, implement, administer, maintain, and modernize complex enterprise network infrastructure.
Assess existing network environments, create network diagrams, document configurations and connectivity, and identify opportunities to improve performance, security, and reliability.
Evaluate network policies and identify configuration gaps involving ACLs, segmentation, and routing.
Support SDN architecture and implementation and provide engineering support for VMware NSX environments.
Assist with storage and backup infrastructure and contribute to hybrid-cloud architecture solutions.
Design and optimize LAN, CAN, and WAN environments, integrate network devices, and support infrastructure upgrades.
Troubleshoot complex network connectivity and performance issues; optimize end-to-end performance, latency, and data throughput.
Collaborate with systems engineers, network administrators, and other technical teams to develop network designs, evaluate requirements, and implement scalable infrastructure.
Analyze system and network requirements and translate them into technical designs and implementation plans.
Provide technical guidance to junior Network Engineers and coordinate network engineering activities.