Cisco Network Security Engineer, TS/SCI

Design, configure, and maintain secure network architectures across classified environments. Implement and manage Cisco security platforms including routers, switches, firewalls, and security appliances. Administer and optimize Cisco Identity Services Engine (ISE) for authentication, authorization, and network access control (NAC). Monitor and assess network performance, security posture, and compliance. Troubleshoot complex network issues and perform root cause analysis. Support continuous improvement of network security policies, procedures, and best practices. Collaborate with cyber, systems, and infrastructure teams to ensure seamless security integration. Prepare documentation, diagrams, and change requests in accordance with government standards. Participate in on-call, incident response, and scheduled maintenance as required.

Active TS/SCI clearance (no exceptions). 5+ years of experience as a Network Engineer or Network Security Engineer. Strong background in Cisco networking technologies (routing, switching, firewalls). Proven experience with Cisco ISE deployment, configuration, and policy management. Hands-on experience with protocols such as BGP, OSPF, EIGRP, 802.1X, TACACS+, and RADIUS. Familiarity with network hardening and cybersecurity principles aligned with DoD or federal guidelines. Ability to work on-site in Seal Beach, CA., Cisco certifications such as CCNP Security, CCNP Enterprise, or CCIE (Security or Enterprise). Experience in DoD or Intelligence Community environments. Knowledge of Cisco ASA, Firepower, or Secure Firewall Threat Defense (FTD). Background with monitoring tools (e.g., SolarWinds, Splunk) or automation (e.g., Python, Ansible). Strong documentation skills and experience with change management processes. 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.

We make technology work so people can do great things.

At CDW, we make it happen, together. Trust, connection, and commitment are at the heart of how we work together to deliver for our customers. It’s why we’re coworkers, not just employees. Coworkers who genuinely believe in supporting our customers and one another. We collectively forge our path forward with a level of commitment that speaks to who we are and where we’re headed. We’re proud to share our story and Make Amazing Happen at CDW., CDW is a leading multi-brand provider of information technology solutions to business, government, education and healthcare customers in the United States, the United Kingdom and Canada. A Fortune 500 company and member of the S&P 500 Index, CDW helps its customers to navigate an increasingly complex IT market and maximize return on their technology investments. Together, we unite. Together, we win. Together, we thrive.