SME Network Engineer

SME Network EngineerRevolutional delivers advanced technology solutions and mission support to federal agencies across civilian, health, and national security environments. We apply modern capabilities, including AI/ML, cloud, cybersecurity, and IT modernization to solve complex challenges, enable faster and more secure operations, and drive measurable mission outcomes.We are redefining how federal technology gets built and delivered by operating with a product mindset, prioritizing speed, ownership, and execution over bureaucracy.SME Network EngineerLocation: Lorton, VA (22079) Citizenship: U.S. Citizen (required for access to DHS IT systems) Clearance: Must be able to obtain and maintain DHS Public Trust Schedule: Full-time; 8-hour workdays with on-call support as needed. Hybrid Work: Lorton, VA roles may telework up to 2 days per week; 3 days onsite required (subject to mission needs) Travel: Occasional CONUS travel; local travel within 50 miles is not reimbursable Salary Range: $130-160k DOERole OverviewRevolutional is seeking an experienced SME Network Engineer to support Department of Homeland Security (DHS).This role provides hands-on leadership across all network engineering functions, including architecture, routing, switching, firewall engineering, VPN and PKI integration, segmentation design, troubleshooting, and IA/accreditation-grade documentation. The SME ensures the integrity, resilience, and performance of mission-critical networks and collaborates closely with Systems, Virtualization, Storage, and Field Engineering teams to ensure end-to-end operational success.This position supports DHS's mission while contributing to Revolutional's overarching goals: delivering premier technology services, driving mission-focused innovation, sustaining organizational excellence, and being an employer of choice for skilled professionals.ResponsibilitiesNetwork Architecture & DesignDesign, document, and maintain network architecture, including:Layer 2/Layer 3 topologyIP address schema and subnettingVLAN/VRF segmentationRouting design (OSPF, BGP, EIGRP, static routing)Firewall zoning, NAT policies, and security segmentationVPN tunnels, encrypted transport paths, and PKI integrationsCOOP/DR network routing and failover pathsProduce and maintain authoritative network diagrams, data flows, trust boundaries, and configuration baselines.Evaluate, recommend, and implement enhancements to improve security, availability, and performance.Network Operations & TroubleshootingServe as the primary network engineer for diagnosing, resolving, and preventing outages across the enterprise.Perform packet-level analysis (Wireshark/tcpdump), flow analysis, and log correlation to identify and remediate issues.Lead network upgrades, configuration changes, ACL/policy adjustments, and planned maintenance.Monitor network performance and availability; tune routing, firewall, and VPN parameters as needed.Firewall, Security & Accreditation SupportEngineer and maintain firewall policies and segmentation (Palo Alto preferred; Fortinet/Cisco ASA experience acceptable).Support security hardening, vulnerability remediation, and IA/ATO documentation requirements.Produce accreditation-ready artifacts, including boundary diagrams, data-flow representations, rule documentation, and enclave segmentation maps.Collaborate with ISSO and security teams to address findings and strengthen compliance posture.Interoperability & Cross-Domain IntegrationDocument and support network dependencies across Active Directory, DNS/DHCP, VMware/vSphere, SAN/iSCSI/NFS storage, and application tiers.Validate end-to-end system functionality after network changes.Partner with Systems, Virtualization, Storage, and Field SMEs to maintain seamless operations across sites.COOP/DR & Lab EngineeringContribute to COOP/DR planning, design, and testing to ensure high availability and rapid failover capabilities.Support lab environment setup for replication, patch validation, and network simulation.Documentation & Mission CoordinationMaintain technical documentation, diagrams, IP plans, SOPs, and configuration repositories.Coordinate with Revolutional and DHS technical leads to resolve issues, support field operations, and sustain mission readiness.Required QualificationsBachelor's degree in IT, Engineering, or related field OR +5 years equivalent experience.10+ years of enterprise network engineering experience with increasing responsibility.Technical ProficiencyDeep hands-on experience with:Cisco routing/switching (3k–9k platforms)Palo Alto or Fortinet firewalls and policy designVPN architecture, IPsec tunneling, PKI integrationNetwork segmentation using VLANs, VRFs, and security zonesPacket capture and analysisNetwork monitoring and telemetry tools (SolarWinds, NetFlow, Splunk, etc.)Demonstrated ability to produce complete network diagrams and architecture documentation based solely on device configuration, logs, and analysis.Strong understanding of cross-domain interactions (DNS, AD, VMware networking, SAN connectivity).Preferred CertificationsCCNA, CCNP Enterprise or CCNP SecurityPCNSEFortinet NSE4/NSE5CCIE-level competency (or equivalent expertise)Additional certifications may be required after hire and must be obtained within designated timelines.Professional CompetenciesExcellent communication skills with both technical and non-technical stakeholders.Proven ability to work independently in high-pressure, mission-critical environments.Strong analytical, investigative, and documentation skills.Preferred ExperienceExperience supporting federal law enforcement IT systems or aligned mission operations.Hands-on participation in COOP/DR architecture or failover site execution.Experience with VPN transitions, network segmentation, and multi-site resiliency.Familiarity with Kubernetes/container environments (e.g., JSI platforms).Experience supporting 24/7 high-availability operations.Soft SkillsStrong initiative and attention to detail.Adaptability to evolving mission requirements and operational tempo.Collaborative approach with technical teams, vendors, and government partners.Alignment with Revolutional's principles of excellence, collaboration, curiosity, and integrity.Physical Demands / Work EnvironmentMust regularly lift/move up to 50 lbs.; occasionally up to 80 lbs. using a hand truck or lift cart.Requires standing, kneeling, crouching, and navigating server-room environments.Normal vision and hearing required; moderate server-room noise.