Call Manager Engineer, TS​/SCI

Responsibilities

• 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.
• 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.

Demonstrates extensive experience in administering and supporting Cisco Unified Communications Manager (CUCM) environments, with strong capabilities in troubleshooting VoIP and IP Telephony solutions. Proficient in designing multi‑site Cisco collaboration solutions and optimizing voice infrastructure performance.