Senior Network Engineer - TS/SCI Clearance

CO1002 CDW Government, LLC; Washington (District of Columbia, VA); On-site; USD 160,000 - 220,000; Full time

Job summary

CDW Government, LLC is seeking a Senior Network Engineer to support mission‑critical, secure federal networks. The role requires an active TS/SCI clearance and focuses on design, implementation, administration, troubleshooting, and sustainment of enterprise network systems across classified and unclassified environments.

You will work on routing, switching, firewalls, VPNs, monitoring, and documentation while ensuring high availability and security.

Qualifications

• Active TS/SCI clearance required with U.S. citizenship
• Senior‑level hands‑on experience in enterprise network engineering or infrastructure in secure environments
• Strong knowledge of routing, switching, VLANs, and network segmentation
• Experience with Cisco or comparable platforms, firewalls, VPNs, and network management tools
• Ability to troubleshoot complex network issues across physical, virtual, and transport layers
• Familiarity with DISA STIGs, vulnerability remediation, and RMF/ATO support

Responsibilities

• Design, implement, and maintain enterprise network infrastructure (LAN, WAN, VPN)
• Monitor, troubleshoot, and respond to incidents to ensure high availability
• Develop architecture diagrams, topologies, SOPs, and as‑built documents
• Support change management to minimize downtime and risk
• Provide technical guidance to junior engineers and coordinate with stakeholders

Skills

Routing & Switching

Firewalls & VPN

Network Security

Network Monitoring

Documentation

Change Management

DoD RMF/ATO

Scripting/Automation

Education

Bachelor's degree in Computer Science, Information Technology, Cybersecurity, Engineering, or related technical discipline

Tools

SNMP

SYSLOG

NetFlow

SolarWinds

Splunk

Job 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. At CDW, we make technology work so people can do great things. We are a leading multi‑brand technology solutions provider to business, government, education and healthcare customers in the United States, the United Kingdom and Canada. Our coworkers across the globe are working together to bring technology to life for our customers by solving complicated IT business challenges, providing outstanding service, and orchestrating the technology landscape to optimize our customers’ performance.