SME Network & Computer Systems Administrator
Location: Lorton, VA
Company: Harmonia Holdings Group, LLC
Job Description Apply Now
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.
Title: SME Network & Computer Systems Administrator
Location: Hybrid (3 days on-site)
Terms: Full-time
Clearance: Able to obtain a Public Trust (US Citizenship required)
Travel: Occasional
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.
Role Overview
Harmonia Holdings Group is seeking a highly skilled SME Network & Computer Systems Administrator to support DHS ICE Homeland Security Investigations (HSI) Title III and Linguists Unit (T3LU) under the CALEA program. This role provides advanced technical leadership and mission-critical support for secure law-enforcement systems operating 24/7 across multiple locations.
The SME Administrator will manage and troubleshoot enterprise networks, servers, virtual environments, and security configurations while collaborating on the design and maintenance of the CALEA Continuity of Operations (COOP) site in Scottsdale, AZ. A shared responsibility among Harmonia, government, and vendor partners.
This position supports DHS’s mission while contributing to Harmonia’s overarching goals: delivering premier technology services, driving mission-focused innovation, sustaining organizational excellence, and being an employer of choice for skilled professionals.
Responsibilities
- Install, configure, administer, and maintain CALEA LAN/WAN infrastructure, servers, SANs, and network devices.
- Administer Active Directory (AD), including:
• Promoting/demoting domain controllers
• Troubleshooting DNS and DHCP issues
• Managing GPO hierarchy and execution
• Writing and maintaining PowerShell/Bash scripts for automation
• Analyzing event logs and Windows system errors - Plan, deploy, and maintain COOP and DR capabilities in coordination with the Government and vendor partners, ensuring redundancy and failover readiness.
- Patch and update servers and workstations; ensure security baseline compliance with DHS and FISMA standards.
- Apply and troubleshoot security hardening requirements and vulnerability remediation; support the ATO process and collaborate with the ISSO to resolve findings.
- Administer virtualization and storage platforms, including:
• VMware ESXi/vCenter – patching, updates, capacity planning, troubleshooting
• Nutanix – cluster management and maintenance
• NetApp – SAN/NAS configuration and data management - Assist with Palo Alto firewall deployment and rule migration (from Cisco ASA 5506) to support network segmentation and high availability.
- Configure and troubleshoot Cisco and Dell switches; support VPN tunnels and IP transition projects (copper to fiber).
- Support lab environment setup and testing for patch validation and COOP simulation.
- Perform hardware replacement (hard drives, memory modules, power supplies, etc.).
- Maintain technical documentation, diagrams, and SOPs in CALEA repositories.
- Liaise with Harmonia and ICE technical leads to coordinate troubleshooting and mission support.
Required Qualifications
- Bachelor’s degree in IT, Engineering, or related field OR +5 years equivalent experience.
- 10+ years enterprise IT systems/network administration experience.
- Preferred Certifications:
• Microsoft Certified Solutions Associate (MCSA)
• Microsoft Certified Systems Engineer (MCSE + Security)
• CompTIA Security+ (active certification preferred)
• PMP (Project Management Professional) - Proficiency in:
• Active Directory, DNS, DHCP, and GPO management
• PowerShell or Bash scripting for automation and administration
• VMware, Nutanix, and NetApp administration
• Windows Server and Linux system management
• Server/workstation patching and security remediation
• Security standards, ATO processes, and coordination with ISSO
• Cisco/Dell network devices and Palo Alto firewalls - Excellent communication skills with both technical and non-technical stakeholders.
- Ability to work independently in high-pressure, mission-critical environments.
Preferred Qualifications
- Experience supporting federal law enforcement IT systems or CALEA-related operations.
- Hands-on experience assisting with the design or deployment of COOP/DR sites.
- Knowledge of Palo Alto firewall configuration and migration.
- Familiarity with Kubernetes or containerized applications (e.g., JSI platforms).
- Experience with static routing, VPN tunnels, and multi-site network resiliency.
- Familiarity with lab testing and replication validation processes.
- Prior experience supporting high-availability, 24/7 mission operations.
Soft Skills
- Analytical and detail-oriented with strong initiative.
- Adaptability to changing mission needs and operational tempo.
- Collaborative approach with vendors (JSI, Palo Alto) and government teams.
- Commitment to Harmonia’s principles of excellence, collaboration, curiosity, and integrity, and growth within an employer of choice organization.
Physical Demands / Work Environment
- Must regularly lift/move up to 50 lbs.; occasionally up to 80 lbs. with hand truck/lift cart.
- Requires standing, kneeling, crouching, and crawling in server rooms.
- Normal hearing/vision required; moderate server-room noise
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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 Labor's 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 Tibbett's 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 our , , and to 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 veterans. To 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 .