Senior Network Engineer - TS/SCI Clearance

CDW group; Town of Florida (NY); On-site; USD 160,000 - 220,000; Full time

Job summary

CDW is seeking a Senior Network Engineer to support mission-critical infrastructure in a secure federal environment. The role requires an active TS/SCI clearance and focuses on design, implementation, administration, troubleshooting, and sustainment of enterprise network systems.

You will design and maintain LAN/WAN, VPN, routing, switching, firewalls, and security controls while ensuring high availability and compliance with DoD and RMF requirements.

Qualifications

• Active TS/SCI clearance required.
• U.S. citizenship required due to federal security requirements.
• Senior-level hands-on experience in enterprise network engineering within federal, defense, or similarly secure environments.
• Strong routing and switching skills, VLANs, trunking, subnetting, routing protocols, redundancy, and network segmentation.
• Experience with Cisco or comparable network platforms, firewalls, VPNs, load balancers, wireless systems, and network management tools.
• Ability to create clear technical documentation, diagrams, implementation plans, and operational procedures.
• Bachelor’s degree in Computer Science, Information Technology, Cybersecurity, Engineering, or related field; additional relevant experience may be considered in lieu of a degree.
• DoD 8570/8140 IAT Level II certification, such as Security+ CE, or ability to obtain within program requirements; CCNP certification is a plus.
• Experience with network automation, configuration management, scripting, or orchestration tools is a plus.
• Experience supporting classified networks, multi-enclave environments, cross-domain considerations, or secure transport solutions is a plus.
• Familiarity with INFOSEC, COMSEC, encryption, zero trust principles, and secure network design practices is a plus.

Responsibilities

• Design, configure, implement, and maintain enterprise network infrastructure, including LAN, WAN, VPN, routing, switching, firewall, wireless, and related network technologies.
• Perform day-to-day network operations and maintenance, including monitoring, troubleshooting, incident response, upgrades, patching, and lifecycle support.
• Diagnose and resolve complex network issues affecting availability, performance, connectivity, latency, and security across classified and unclassified environments.
• Develop, review, and maintain network architecture diagrams, topology maps, configuration documentation, implementation plans, standard operating procedures, and as-built documentation.
• Plan and execute network changes through established change management processes while minimizing operational risk and downtime.
• Support network security requirements, including secure configuration baselines, access control, vulnerability remediation, STIG compliance, POA&M support, and coordination with cybersecurity teams.
• Evaluate network hardware, software, and transport solutions and provide recommendations for upgrades, modernization, resiliency, and performance improvement.
• Collaborate with government stakeholders, technical teams, vendors, and mission partners to translate requirements into secure and scalable network solutions.
• Support accreditation, audit, and compliance activities by providing technical artifacts, configuration data, ports/protocols/services information, and network security documentation.
• Provide technical guidance and mentorship to junior engineers and operations personnel as needed.

Skills

Active TS/SCI clearance

Routing & switching

Networking protocols

Firewall configuration

Network security

Documentation

Education

Bachelor's degree in Computer Science/IT/Engineering

DoD 8570/8140 IAT Level II certification

CCNP certification

Tools

Cisco IOS

SNMP

Splunk

SolarWinds

Job description

Description

The Senior Network Engineer will support mission-critical network infrastructure within a secure federal environment. This role requires an active TS/SCI clearance and is focused on the design, implementation, administration, troubleshooting, and sustainment of enterprise network systems. The ideal candidate will bring strong hands‑on experience with routing, switching, firewalls, network security, performance monitoring, and documentation while supporting highly available and secure network operations.

What You Will Do

• Design, configure, implement, and maintain enterprise network infrastructure, including LAN, WAN, VPN, routing, switching, firewall, wireless, and related network technologies.
• Perform day-to-day network operations and maintenance, including monitoring, troubleshooting, incident response, upgrades, patching, and lifecycle support.
• Diagnose and resolve complex network issues affecting availability, performance, connectivity, latency, and security across classified and unclassified environments.
• Develop, review, and maintain network architecture diagrams, topology maps, configuration documentation, implementation plans, standard operating procedures, and as‑built documentation.
• Plan and execute network changes through established change management processes while minimizing operational risk and downtime.
• Support network security requirements, including secure configuration baselines, access control, vulnerability remediation, STIG compliance, POA&M support, and coordination with cybersecurity teams.
• Evaluate network hardware, software, and transport solutions and provide recommendations for upgrades, modernization, resiliency, and performance improvement.
• Collaborate with government stakeholders, technical teams, vendors, and mission partners to translate requirements into secure and scalable network solutions.
• Support accreditation, audit, and compliance activities by providing technical artifacts, configuration data, ports/protocols/services information, and network security documentation.
• Provide technical guidance and mentorship to junior engineers and operations personnel as needed.

What We Expect of You

• Active TS/SCI clearance required.
• U.S. citizenship required due to federal security requirements.
• Senior-level hands‑on experience supporting enterprise network engineering, network operations, or infrastructure engineering in federal, defense, intelligence, or similarly secure environments.
• Strong working knowledge of routing and switching concepts, including VLANs, trunking, subnetting, routing protocols, high availability, redundancy, and network segmentation.
• Experience configuring, supporting, and troubleshooting Cisco or comparable network platforms, firewalls, VPNs, load balancers, wireless systems, and network management tools.
• Ability to troubleshoot complex network problems across physical, virtual, and transport layers using logs, packet captures, monitoring tools, and command‑line diagnostics.
• Familiarity with DoD cybersecurity and compliance practices, including DISA STIGs, vulnerability remediation, secure configuration management, and RMF/ATO support.
• Ability to create clear technical documentation, diagrams, implementation plans, and operational procedures.
• Strong communication skills with the ability to brief technical issues, risks, and recommendations to engineering teams, program leadership, and government stakeholders.
• Ability to work independently in a secure, mission‑focused environment while managing multiple priorities and operational requirements.
• Bachelor’s degree in Computer Science, Information Technology, Cybersecurity, Engineering, or a related technical discipline; additional relevant experience may be considered in lieu of a degree, is a plus.
• DoD 8570/8140 IAT Level II certification, such as Security+ CE, or ability to obtain within program requirements, is a plus.
• Active CCNP certification, is a plus.
• Experience with network automation, configuration management, scripting, or orchestration tools, is a plus.
• Experience supporting classified networks, multi‑enclave environments, cross‑domain considerations, or secure transport solutions, is a plus.
• Familiarity with INFOSEC, COMSEC, encryption, zero trust principles, and secure network design practices, is a plus.
• Experience with network monitoring and logging tools such as SNMP, SYSLOG, NetFlow, SolarWinds, Splunk, or comparable platforms, is a plus.

Pay range: $160,000 – $220,000 depending on experience and skill set.
Benefits overview: CDW Benefits
Salary ranges may be subject to geographic differentials.

CDW is committed to being an AI‑fluent organization

We’re looking for people who bring curiosity, a learner’s mindset, and a willingness to engage with ever‑evolving technology and tools. We value adopting AI as a partner, openness to experimentation, and a shared interest in learning together on AI. Our goal is to create a culture where AI enhances—not replaces—human creativity and decision‑making. You don’t need to be an expert today; what matters is your readiness to explore, adapt, and grow with us as we integrate AI responsibly and effectively into our work.

Additionally, CDW is committed to fostering an equitable, transparent, and respectful hiring process for all applicants. During our application process, our goal is to understand your experience, strengths, skills, and qualifications. As an AI forward company, we see AI not just as a tool, but as a catalyst for new ways of thinking, creating, and communicating. We encourage candidates to embrace an AI mindset, one that’s curious, adaptive, and ready to explore what’s possible. We welcome thoughtful use of AI to expand your perspective and elevate how you share your story, while ensuring your application remains rooted in your own background, judgment, and voice.

About Us

CDW is a Fortune 500 technology solutions provider that helps businesses, government, education, and healthcare organizations achieve what’s possible through technology. What makes CDW different isn’t just what we do—it’s how we do it. At CDW we act as one—building trust, speaking candidly, and working together to achieve more. We play to win—focusing on what matters most and delivering for our customers. And we think forward—staying curious, moving fast, and continuously learning. We believe meaningful work happens when people feel supported, heard, and empowered to contribute. That’s why we think of ourselves as coworkers, not just employees—working together to solve complex challenges and deliver real impact for our customers and communities.

As a full‑stack, full‑lifecycle technology partner, CDW brings deep expertise, strong relationships, and broad industry knowledge to help turn ideas into outcomes. When you join CDW, you become part of a collaborative environment where your work matters, your growth is supported, and your contributions help shape what’s next.

Together, we deliver the full promise of what technology can do. Together, we Make Amazing Happen.

CDW is an equal opportunity employer. All qualified applicants will receive consideration for employment without regards to race, color, religion, sex, sexual orientation, gender identity, national origin, disability status, protected veteran status or any other basis prohibited by state and local law.