Harmonia Holdings Group, LLC · 2 hours ago
SME Network Engineer
Lorton, VA
Full-time
Hybrid
Senior Level, Lead/Staff
10+ years expHarmonia Holdings Group, LLC is an award-winning, rapidly growing federal government contractor committed to providing innovative, high-performing solutions to our government clients. The SME Network Engineer will provide hands-on leadership across all network engineering functions, ensuring the integrity, resilience, and performance of mission-critical CALEA networks while collaborating closely with various teams to ensure operational success.
ComputerRoboticsSoftware
No H1B
Security Clearance RequiredU.S. Citizen Only
Responsibilities
Design, document, and maintain CALEA 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 CALEA 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 CALEA 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 Harmonia and ICE technical leads to resolve issues, support field operations, and sustain mission readiness
Qualification
Required
U.S. Citizen (required for access to DHS IT systems)
Must be able to obtain and maintain DHS/ICE Fitness Determination (Public Trust), including favorable preliminary Fitness and full NBIS eAPP investigation (SF-85P, OF-306, SSA-89, fingerprints, PREA questionnaire if required)
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)
Deep hands-on experience with Palo Alto or Fortinet firewalls and policy design
Deep hands-on experience with VPN architecture, IPsec tunneling, PKI integration
Deep hands-on experience with network segmentation using VLANs, VRFs, and security zones
Deep hands-on experience with packet capture and analysis
Deep hands-on experience with 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
Preferred
CCNA, CCNP Enterprise or CCNP Security
PCNSE
Fortinet NSE4/NSE5
CCIE-level competency (or equivalent expertise)
Experience supporting federal law enforcement IT systems or CALEA-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 Harmonia's principles of excellence, collaboration, curiosity, and integrity
Benefits
Traditional and HSA- eligible medical insurance plans w/ Wellness Incentives for employees and family
100% employer-paid dental and vision insurance options
100% employer-sponsored STD, LTD, and life insurance
Veterans Cohort
Gym membership reimbursement
401(k) matching
Dollar-for-dollar 501(c)(3) donation matching
Flexible-schedules and teleworking options
Paid holidays and Flexible Paid Time Off
Adoption Expense Reimbursement
Paid Parental Leave
Professional development and career growth opportunities and paid training days
Employer-sponsored Employee Assistance Program for employee and family
Team and company-wide events, recognition, and appreciation-- and so much more!
Company
Harmonia Holdings Group, LLC
Harmonia Holdings Group is a computer software company that provides application development services.
201-500 employees
Funding
Current Stage
Growth StageTotal Funding
unknownKey Investors
Madison Dearborn Partners
2024-09-07Private Equity
Leadership Team
Damon Griggs
CEO and Chairman
Kirstin Shelton
Chief Human Resources Officer
Recent News
Washington Technology
2025-09-08
The Business Journals
2025-01-10
Company data provided by crunchbase