SME Network Engineer

Revolutional, LLC•Lorton, VA

62d•$130,000 - $160,000•Hybrid

About The Position

Revolutional 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. Revolutional 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.

Requirements

Bachelor’s degree in IT, Engineering, or related field OR +5 years equivalent experience.
10+ years of enterprise network engineering experience with increasing responsibility.
Deep hands-on experience with: Cisco routing/switching (3k–9k platforms), Palo Alto or Fortinet firewalls and policy design, VPN architecture, IPsec tunneling, PKI integration, Network segmentation using VLANs, VRFs, and security zones, Packet capture and analysis, Network 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).
Excellent 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.
Must 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.

Nice To Haves

CCNA, CCNP Enterprise or CCNP Security
PCNSE
Fortinet NSE4/NSE5
CCIE-level competency (or equivalent expertise)
Experience 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.
Strong 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.

Responsibilities

Design, document, and maintain network architecture, including: Layer 2/Layer 3 topology, IP address schema and subnetting, VLAN/VRF segmentation, Routing design (OSPF, BGP, EIGRP, static routing), Firewall zoning, NAT policies, and security segmentation, VPN tunnels, encrypted transport paths, and PKI integrations, COOP/DR network routing and failover paths.
Produce and maintain authoritative network diagrams, data flows, trust boundaries, and configuration baselines.
Evaluate, recommend, and implement enhancements to improve security, availability, and performance.
Serve 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.
Engineer 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.
Document 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.
Contribute 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.
Maintain 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.