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.

• 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.
• 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 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.

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.