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Network Systems Engineer (5016) (US, DC, Tampa, San Antonio) (Secret)
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We have an immediate opportunity for a Network Systems Engineer who is excited to apply their talents to our customer's challenging project and one who will thrive in a collaborative environment. The ideal candidate is a recognized professional with hands-on expertise and an excellent understanding of engineering processes supporting large, National Defense, Agile software development programs.
Work will be performed in Colorado. Please apply to this role if you have interest in relocating to Colorado.
Essential Duties & Responsibilities
- Design, implement, and maintain network infrastructure supporting IaaS platforms and services
- Plan, deploy, and troubleshoot LAN, WAN, firewalls, DNS, VLANs, IP addressing (static and dynamic), and VPN solutions (site-to-site and remote access)
- Configure, maintain, and patch Layer 2 / Layer 3 switching and routing
- Troubleshoot networking issues across the OSI stack using physical and software-based diagnostic tools
- Implement and maintain network security controls, including monitoring, hardening, threat modeling, and vulnerability mitigation
- Support networking in on-prem, cloud, and hybrid environments, including AWS and Azure
- Configure and maintain network protocols and technologies such as: BGP Spanning Tree LLDP Link aggregation (MCLAG, LACP)
- Support storage networking, including SAN and Fibre Channel switched fabric topologies
- Collaborate with systems, virtualization, storage, and platform engineers to deliver integrated infrastructure solutions
- Support Linux and Windows-based networking and firewall configurations, including VMware environments
- Participate in infrastructure planning, upgrades, and lifecycle management
- Develop and maintain network documentation, diagrams, procedures, and change records
- Support automation and repeatability efforts across network and infrastructure services
- Communicate clearly with technical and non-technical stakeholders
- Own issues through resolution and contribute to continuous improvement initiatives
- Perform other duties as assigned
Required Skills & Experience
- Clearance Required: Secret
- 3+ years of professional experience in network engineering or network systems roles
- Demonstrated understanding of network architecture, design, and core networking concepts
- Hands-on experience troubleshooting TCP/IP networks across OSI layers
- Proficiency with network security principles, including monitoring, hardening, and common threat models
- Experience deploying and supporting: WAN, LAN, VLANs, firewalls, DNS Static and dynamic IP addressing
- Site-to-site and remote VPNs
- Experience configuring and maintaining L2/L3 switching and routing
- Working knowledge of Storage Area Networks (SANs) and Fibre Channel networking
- Proficiency with Linux and Windows operating systems
- Familiarity with application-layer networking and firewall configuration in Linux and VMware environments
- Detail oriented Strong oral and written communication skills
- Ability to work collaboratively in a team-oriented environment
- Self-motivated, detail-oriented, and able to own work through completion
Desired Skills & Experience
- Bachelor’s degree in Information Technology, Network Engineering, Computer Engineering, or a related technical field
- Experience with Dell switches, servers, and SAN solutions
- Experience with VMware vSphere and vCenter
- Security+ or equivalent security certification
- Experience with NAS and/or SAN configuration and maintenance
- Experience providing technical leadership or mentoring in small infrastructure teams
- Experience with automation and scripting (Bash, Python, Perl, Ansible, PowerShell)
- Experience with Git / GitLab and CI/CD pipelines
- Familiarity with container platforms, including container networking and security
- Demonstrated ability to document, track, and execute requirements, procedures, and infrastructure changes
Application Deadline: March 30, 2026
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The SMX salary determination process takes into account a number of factors, including but not limited to, geographic location, Federal Government contract labor categories, relevant prior work experience, specific skills, education and certifications. At SMX, one of our Core Values is to Invest in Our People so we offer a competitive mix of compensation, learning & development opportunities, and benefits. Some key components of our robust benefits include health insurance, paid leave, and retirement.
The proposed salary for this position is:
$103,100—$171,800 USD
At SMX®, we are a team of technical and domain experts dedicated to enabling your mission. From priority national security initiatives for the DoD to highly assured and compliant solutions for healthcare, we understand that digital transformation is key to your future success.
We share your vision for the future and strive to accelerate your impact on the world. We bring both cutting edge technology and an expansive view of what’s possible to every engagement. Our delivery model and unique approaches harness our deep technical and domain knowledge, providing forward-looking insights and practical solutions to power secure mission acceleration.
SMX is an Equal Opportunity employer including disabilities and veterans.
Selected applicant may be subject to a background investigation and/or education verification.
SMX does not sponsor a new applicant for employment authorization or immigration related support for this position (i.e. H1B, F-1 OPT, F-1 STEM OPT, F-1 CPT, J-1, TN, E-2, E-3, L-1 and O-1, or any EADs or other forms of work authorization that require immigration support from an employer).
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