Cisco Call Manager Engineer, TS/SCI

CDW is seeking a Cisco Unified Communications (UC) Engineer to support and maintain enterprise voice and collaboration environments within a secure government customer environment. This role is responsible for the administration, engineering, deployment, troubleshooting, and optimization of Cisco Unified Communications Manager (CUCM/Call Manager) and related collaboration technologies. The ideal candidate is a hands-on Cisco voice engineer with current Cisco Call Manager experience, a strong networking foundation in routing and switching, and the ability to support mission-critical communications systems in a highly secure environment. This position requires an active TS/SCI clearance and onsite work within a SCIF (Sensitive Compartmented Information Facility).

• Administer, maintain, and support Cisco Unified Communications Manager (CUCM/Call Manager) environments.
• Design, deploy, configure, and troubleshoot Cisco IP Telephony, voice, video, mobility, and collaboration solutions.
• Analyze, troubleshoot, and resolve call routing issues, call flow failures, and call quality concerns.
• Create, analyze, and troubleshoot call flows and Call Detail Records (CDRs).
• Perform software upgrades, patching, migrations, and lifecycle management activities within Cisco UC environments.
• Support Cisco Unity Connection voicemail systems and Cisco IP phone deployments.
• Participate in the design and implementation of multi-site Cisco collaboration solutions.
• Provide Tier III technical support and serve as an escalation point for complex voice and network issues.
• Collaborate with network engineers, security teams, vendors, and customer stakeholders to ensure system availability and performance.
• Monitor and optimize voice infrastructure performance across enterprise environments.
• Document configurations, procedures, and technical solutions in accordance with customer requirements.

• Active TS/SCI security clearance required. Candidates must possess a current TS/SCI clearance; eligibility alone is not sufficient.
• 5+ years of hands-on experience supporting and administering Cisco Unified Communications Manager (CUCM/Call Manager) environments.
• Experience troubleshooting Cisco VoIP and IP Telephony solutions in enterprise environments.
• Strong knowledge of SIP, SCCP, call routing, dial plans, gateways, trunking, and voice troubleshooting.
• Experience creating, analyzing, and troubleshooting call flows and Call Detail Records (CDRs).
• Experience designing and supporting multi-site Cisco voice solutions.
• Working knowledge of Cisco routing and switching technologies.
• Ability to independently diagnose and resolve complex technical issues.
• Strong verbal and written communication skills.
• Ability to work onsite full-time in a secure SCIF environment.
• Cisco Certified Network Professional (CCNP) Collaboration, is a plus.
• CCNP Enterprise or equivalent routing and switching experience, is a plus.
• Experience with Cisco Unity Connection, is a plus.
• Experience supporting secure government, defense, or classified environments, is a plus.
• Cisco Certified Internetwork Expert (CCIE) Collaboration or equivalent advanced Cisco expertise, is a plus.
• Experience with remote monitoring and management of enterprise Cisco UC environments, is a plus.
  Pay range: $180,000 - $240,000 depending on experience and skill set.
  Benefits overview: CDW Benefits
  Salary ranges may be subject to geographic differentials.

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.



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.

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.