Senior Network Engineer

As a dynamic systems integrator, SMS offers proven solutions in engineering, operations, cybersecurity, and digital transformation. With expertise in modernizing and optimizing legacy infrastructure and systems, ensuring operational efficiency, and designing, implementing, and managing secure environments, SMS supports business and mission goals with proficiency, quality, and integrity.

SMS has been serving the advanced information technology needs of the federal government since 1976, delivering talented teams and innovative, cost-effective solutions and services to support our customers’ missions for more than 45 years. SMS is headquartered in McLean, Virginia, with offices and on-site operations at customer locations throughout the United States. For additional information on SMS, visit www.sms.com.

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Mission

Serve as the senior technical lead for enterprise network engineering in support of DTRA missions. Design, secure, and sustain resilient IP networks across multi-classification environments to enable global operations, data transport, and interagency collaboration.

Responsibilities

• Architect, implement, and sustain LAN/WAN/MPLS/SD‑WAN for multi-site, multi-classification networks
• Lead network modernization, tech refresh, and lifecycle management aligned to DoD standards and Zero Trust objectives
• Perform Tier III engineering and escalation for complex routing, switching, encryption, and transport issues
• Plan and execute changes via formal change control, including ASIs with rollback and validation criteria
• Engineer segmentation and policy enforcement, integrating firewalls, VPN, IDS/IPS, and micro‑segmentation
• Optimize performance and availability with QoS, load balancing, path resiliency, and capacity planning
• Produce and maintain engineering artifacts: HLD/LLD, EIPs, SOPs, BoMs, diagrams, and AARs
• Conduct root cause analysis and problem management with measurable corrective actions
• Integrate monitoring and telemetry for proactive detection and SLA reporting
• Support RMF-aligned hardening, STIG compliance, IAVM remediation, and continuous monitoring in coordination with cybersecurity teams
• Mentor junior engineers and coordinate with vendors, OEMs, and government stakeholders

• 8+ years enterprise network engineering with recent DoD mission support
• Expert-level routing and switching: BGP, OSPF, EIGRP, VLANs, VXLAN, EVPN, STP, QoS
• Secure transport and edge: IPsec, SSL/TLS VPN, GRE, DMVPN, NAT/PAT, TACACS+/RADIUS
• High availability and scale: HSRP/VRRP, ECMP, link aggregation, GLBP, load balancers
• Hands-on with major platforms: Cisco IOS/XE/NX‑OS, Juniper Junos, Palo Alto, Fortinet, F5
• Network visibility and management: SNMP/NETCONF, syslog, NetFlow/IPFIX, SIEM integration
• Proven change, incident, and problem management in ITSM frameworks
• Strong documentation, briefing, and stakeholder engagement skills
• Active TS/SCI clearance
• Maintain an IAT level II certification or higher

SMS is a dynamic systems integrator established in 1976, delivering talented teams and innovative, cost-effective solutions and services to support our customers’ missions for more than 47 years. Our ability to hire and retain quality people in a rapidly evolving IT market is proven through our employee retention rate averaging over 3 years. At SMS, we place a high value on quality of service, customer satisfaction, and best-of-breed policies and practices, resulting in CMMI Level 3 certification and ISO registrations including 9001:2015, 20000-1:2018, and ISO/IEC 27001:2013. SMS is headquartered in McLean, Virginia, with offices and on-site operations at customer locations throughout the United States. 

SMS is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, or status as a protected veteran.