Senior Network Engineer – Systems Integration with Security Clearance

Integration Innovation, Inc.; Huntsville (AL); On-site; USD 120,000 - 165,000; Full time

Job summary

i3 is seeking a Senior Network Engineer to support Army Aviation systems integration, interoperability testing, and cybersecurity at Redstone Arsenal in Huntsville, Alabama. The role focuses on secure lab infrastructure, virtualization, and IaC to modernize test environments.

You will maintain networks and compute resources, support RMF/ATO activities, and collaborate with government customers and engineering teams to ensure secure, repeatable interoperability testing.

Qualifications

• Bachelor’s degree in a related technical discipline is required.
• 10+ years of relevant network engineering, systems administration or cybersecurity experience.
• Strong knowledge of TCP/IP, Layer 2/3 networking, routing, VLANs, and troubleshooting.
• Experience with Windows and Linux administration and virtualization (VMware/Proxmox/KVM).
• Experience with RMF/ATO, vulnerability management, STIGs, and configuration docs.
• Active SECRET clearance and DoD cybersecurity certification (IAT II preferred).

Responsibilities

• Design, configure, maintain, and troubleshoot secure network and compute infrastructure for labs.
• Support interoperability testing of Army Aviation, C5ISR, and tactical systems.
• Assist RMF/ATO, vulnerability management, STIG compliance, patching, and documentation.
• Maintain network architecture, baselines, diagrams, inventories, and procedures.
• Develop automation scripts and IaC to improve test and cybersecurity activities.
• Coordinate with government customers, cybersecurity personnel, and engineering teams.

Skills

TCP/IP

Layer 2/3 networking

Network troubleshooting

Windows/Linux admin

Scripting/Automation

RMF/ATO security

DoD cybersecurity

Education

Bachelor’s degree in a related technical discipline

Tools

VMware

Proxmox

KVM

Wireshark

ACAS/Nessus

Splunk

Job description

i3 is seeking a Senior Network Engineer to support Army Aviation systems integration, interoperability testing, and cybersecurity activities at Redstone Arsenal in Huntsville, Alabama. This position supports secure laboratory and test environments used to integrate and evaluate aviation and other Army systems. The engineer will maintain network and computing infrastructure, support system integration and interoperability testing, and support cybersecurity activities necessary to maintain system Authorization to Operate (ATO). The position will also support modernization of the test environment through virtualization, automation, and Infrastructure as Code. This position is on-site at Redstone Arsenal in Huntsville, Alabama. Candidates must possess an active SECRET security clearance.

Responsibilities

Design, configure, maintain, and troubleshoot secure network, server, virtualization, and computing infrastructure supporting laboratory and test environments.

• Support integration and interoperability testing of Army Aviation, C5ISR, tactical communications, and other systems.
• Support RMF/ATO and continuous-monitoring activities, including vulnerability management, STIG compliance, patching, POA&M management, and cybersecurity documentation.
• Maintain network architecture, configuration baselines, system documentation, diagrams, inventories, and technical procedures.
• Develop and maintain scripts, configuration-management solutions, and other automation to improve system administration, cybersecurity, and test activities.
• Support virtualization, Infrastructure as Code, automated environment provisioning, and other DevSecOps practices supporting repeatable interoperability testing.
• Coordinate technical activities with government customers, cybersecurity personnel, engineering teams, vendors, and other integration partners.
• Other duties as assigned.

Qualifications

• Bachelor’s degree in Information Systems, Computer Science, Cybersecurity, Engineering, or a related technical discipline.
• Minimum ten (10) years of relevant experience in network engineering, systems administration, cybersecurity, systems integration, or related technical disciplines.
• Strong knowledge of TCP/IP, Layer 2/Layer 3 networking, routing, switching, VLANs, and network troubleshooting.
• Experience administering Windows and Linux systems and virtualization technologies such as VMware, Proxmox, KVM, or comparable platforms.
• Experience supporting DoD cybersecurity activities, including RMF, vulnerability management, DISA STIGs, system hardening, and configuration management.
• Experience with network and cybersecurity tools such as Wireshark, ACAS/Nessus, Evaluate-STIG, Splunk, or comparable products.
• Experience with scripting or automation technologies such as Python, Bash, PowerShell, Ansible, or comparable tools.
• Active Secret security clearance required. U.S. Citizenship required.
• Must possess the DoD cybersecurity certification required for the assigned work role and privileged access, such as DoD IAT Level II (Intermediate) i.e. COMPTia Sec+.

Preferred

CCNA, CCNP, CISSP, SecurityX/CASP+, or other relevant network or cybersecurity certification.

• Experience supporting Army or DoD systems‑integration laboratories, Software Integration Laboratories (SILs), or interoperability-test environments.
• Experience maintaining an ATO using eMASS, ACAS, STIGs, and POA&M processes.
• Familiarity with Army Aviation, tactical networks, C5ISR systems, or military data standards such as VMF, USMTF, or Link 16.
• Experience with Infrastructure as Code, CI/CD, containers, automated test environments, or cloud-based DevSecOps.
• Experience with COMSEC, CCI, or tactical communications equipment.

Knowledge/Skills

Knowledge of office administration and procedures.

• Excellent communication, teamwork, and client service skills; ability to clearly communicate in discussions and written documents, and to deliver feedback clearly and tactfully.
• Interact with a diverse array of customers and staff in a professional and courteous manner.
• Work independently with accountability for accurate and complete results.
• Be extremely organized and exceptionally detail oriented.
• Work well both independently and in a team environment.
• Be energized by a fast-paced work environment.
• Must be able to communicate with others effectively.
• Analyze information and respond appropriately.
• Manage time wisely and prioritize tasks.
• Provide superior customer service.
• Multi-task in a pleasant manner.
• Work well under pressure.

PHYSICAL DEMANDS

The physical demands described here are representative of those that must be met by an employee to successfully perform the essential functions of this job.

• While performing the duties of this job, the employee is regularly required to talk or hear. The employee frequently is required to stand; walk; handle or feel; and reach with hands and arms.
• The employee is occasionally required to sit; climb or balance; and stoop, kneel, crouch or crawl. The employee must be able to lift and/or move up to 10 pounds and occasionally lift and/or move up to 25 pounds.
• Specific vision abilities required by this job include close vision, distance vision, peripheral vision, depth perception and ability to adjust focus.
• Regular i3 hours are 8:00 a.m. - 5:00 p.m. Monday-Friday, however, additional hours may be required on occasion. Regular and punctual attendance is required.

About i3 Founded in 2007, Integration Innovation, Inc. (i3) is headquartered in Huntsville, AL, with additional offices in Orlando, FL, and the National Capital Region. We are a 100% team member-owned mid-tier integrator with over 800 employee-owners, and our culture speaks for itself: we've earned ten Best Places to Work® awards, driven by strong employee engagement, transparent leadership, and a genuine commitment to communication. i3 team members operate at the leading edge of national defense across a broad range of technical disciplines, from systems and software engineering to modeling, simulation, and training solutions to cybersecurity, digital engineering, and enterprise IT. We also take products from prototype through production, bringing that same engineering rigor to manufacturing and delivering hardware at scale. For candidates, that means a rare opportunity: the innovation and mission focus of an engineering services company paired with the hands‑on impact of building and delivering real solutions that benefit the Warfighter, all inside an employee‑owned company where your contributions directly shape both the mission and your ownership stake in the business.