SME Network Engineer

Lorton, VA - USA

Monthly Salary: Not Disclosed

Posted on: 22 hours ago

Vacancies: 1 Vacancy

Job Summary

Harmonia Holdings Group LLC is an award-winning rapidly growing federal government contractor committed to providing innovative high-performing solutions to our government clients and focused on fostering a workplace that encourages growth initiative creativity and employee satisfaction.

SME Network Engineer

Location: Lorton VA (22079)
Citizenship: U.S. Citizen (required for access to DHS IT systems)
Clearance: 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)
Schedule: Full-time; business hours (7:005:30 MF) with required 24/7 on-call availability
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

Role Overview

Harmonia Holdings Group is seeking an experienced SME Network Engineer to support DHS ICE Homeland Security Investigations (HSI) Title III and Linguists Unit (T3LU) under the CALEA program.

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 CALEA networks and collaborates closely with Systems Virtualization Storage and Field Engineering teams to ensure end-to-end operational success.

This position supports DHSs mission while contributing to Harmonias overarching goals: delivering premier technology services driving mission-focused innovation sustaining organizational excellence and being an employer of choice for skilled professionals.

Responsibilities

Network Architecture & Design

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.

Network Operations & Troubleshooting

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.

Firewall Security & Accreditation Support

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.

Interoperability & Cross-Domain Integration

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.

COOP/DR & Lab Engineering

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.

Documentation & Mission Coordination

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.

Required Qualifications

Bachelors degree in IT Engineering or related field OR 5 years equivalent experience.
10 years of enterprise network engineering experience with increasing responsibility.

Technical Proficiency

Deep hands-on experience with:

Cisco routing/switching (3k9k 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).

Preferred Certifications

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

Additional certifications may be required after hire and must be obtained within designated timelines.

Professional Competencies

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.

Preferred Experience

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.

Soft Skills

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 Harmonias principles of excellence collaboration curiosity and integrity.

Physical Demands / Work Environment

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.

#LI #DICE

Here at Harmonia we are pleased to have been repeatedly recognized for our outstanding work culture the innovative work we do and the employees on our team who make a difference each day. Some of these recognitions include:

Recognized as a Top 20 Best Place to Work in Virginia
Recipient of Department of Labors HireVets Gold Medallion
Great Place to Work Certification for five years running
A Virginia Chamber of Commerce Fantastic 50 company
A Northern Virginia Technology Council Tech 100 company
Inc. 5000 list of fastest growing companies for eleven years
Two-time SBA SBIR Tibbetts Award winner
Virginia Values Veterans (V3) Certification

We recognize that every bit of our success is the result of our teams of hard-working motivated and innovative professionals who are proud to call themselves part of the Harmonia family! In addition to competitive compensation a family-focused culture and a dynamic productive work environment we offer all full-time employees a variety of benefits including but not limited to

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!

Check out ourLinkedInFacebook andInstagramto find out a little more about who we are and if we are the right next step for your career!

Harmonia is an Equal Opportunity Employer providing equal employment opportunity to all employees and applicants for employment without regard to race color religion national origin age gender gender identity sexual orientation disability or genetics.Harmonia does and will take affirmative action to employ and advance in employment individuals with disabilities and protected perform the above job successfully an individual must possess the knowledge skills and abilities listed; meet the education and work experience required; and must be able to perform each essential duty and responsibility satisfactorily. Other duties in addition to those listed may be assigned as necessary to meet business needs. Reasonable accommodation will be made to enable an applicant with a disability to successfully apply for and/or perform the essential duties of the job. If you are in need of an accommodation please contact.