Sr. Engineer, Cyber Call Manager - CUCM (Onsite - Largo, FL) TS/SCI clearance required

• Typically requires a degree in Science, Technology, Engineering or Mathematics (STEM) and a minimum of 5 years of prior relevant experience, or an Advanced Degree in a related field and a minimum of 3 years of experience
• Active and transferable U.S. government issued TS/SCI security clearance is required prior to start date
• DoD 8570 IAT Level II certification (Security+ or CISSP preferred) and must be maintained
• Enterprise voice/collaboration engineering experience, including hands-on administration and engineering of Cisco CUCM in complex environments
• Experience with CUCM, Unity Connection, SIP, dial plans, voice gateways, SBCs, conferencing, and Tier III troubleshooting.
• Experience securing DoD or regulated environments, including DISA STIGs, vulnerability remediation, security hardening, compliance, and cybersecurity assessments
• Experience leading CUCM/Unity upgrades, migrations, integrations, testing, production cutovers, change management, and technical documentation

• Experience with Juniper SRX, EX series routers and switches
• Experience deploying security solutions for DoD networks
• Experience with multi-platforms like Windows, UNIX, LINUX
• Understanding of network engineering fundamentals, including: OSI layers, IP addressing, sub-netting, TCP/IP stack, VLANs, DHCP, etc.
• CCNP Collaboration or equivalent hands-on expertise preferred, with demonstrated ability to lead technical initiatives, mentor engineers, and support enterprise voice modernization

At RTX, the world's largest aerospace and defense company, 185,000 great minds are united by purpose and inspired to make a difference solving the world’s most complex problems. With our three market leading businesses, world-class operations and investments in research and development, we offer capabilities and opportunity no one else can. Together, we push the boundaries of known science and find new ways to connect and protect our world.

Collins Aerospace is a leader in technologically advanced, intelligent solutions that help redefine the aerospace and defense industry. With a comprehensive portfolio and deep technical expertise, we help customers meet the demands of the global market. Join us and help shape the future of aerospace and defense.

The organization is seeking a Senior Cisco Unified Communications Engineer to design, administer, and sustain enterprise and classified voice and collaboration environments, with primary responsibility for Cisco CUCM, Unity Connection, VoIP infrastructure, voice gateways, SIP, conferencing, and associated collaboration platforms. The role will provide Tier III technical leadership across system engineering, troubleshooting, upgrades, modernization, and lifecycle management while ensuring DISA STIG compliance, cybersecurity hardening, configuration management, and accreditation requirements are met.

• →Configure, administer, and maintain Cisco Unified Communications Manager (CUCM) clusters supporting enterprise and classified environments
• →Manage and maintain Cisco Unity Connection voicemail systems, including user provisioning, call handlers, automated attendants, and voicemail integrations
• →Configure and support dial plans, route patterns, route groups, route lists, SIP trunks, device pools, partitions, and calling search spaces
• →Administer and troubleshoot voice gateways, session border controllers, and VoIP infrastructure.
• →Provide Tier III technical support, troubleshooting complex voice, call routing, registration, signaling, and voice quality issues
• →Design, implement, and maintain hunt pilots, hunt lists, line groups, call queuing, and call coverage solutions to optimize call distribution and operational workflows
• →Configure, manage, and support Meet-Me conferencing services, conference bridge resources, and collaboration platforms
• →Plan, coordinate, and execute CUCM and Unity Connection upgrades, patches, and lifecycle management activities
• →Develop upgrade runbooks, rollback procedures, testing plans, and maintenance schedules to ensure successful system implementations
• →Deploy, configure, and integrate UniFi FX solutions within enterprise communications environment.
• →Support migration planning, testing, validation, and production cutover activities for voice and collaboration modernization initiatives
• →Implement and maintain DISA Security Technical Implementation Guide (STIG) compliance for Cisco Unified Communications platforms and associated virtual appliances.
• →Perform vulnerability remediation, security hardening, compliance validation, and support cybersecurity audits, inspections, and accreditation activities
• →Maintain secure communications environments in accordance with DoD, organizational, and cybersecurity requirements.
• →Develop and maintain engineering diagrams, configuration standards, operational procedures, disaster recovery plans, and technical documentation
• →Create, document, and defend system change requests while ensuring configuration management compliance
• →Conduct root cause analysis, incident response activities, and corrective actions to improve system reliability and performance
• →Collaborate with cybersecurity, network, infrastructure, and business stakeholders to implement and support enterprise communication services
• →Gather, analyze, and report system performance metrics to support operational readiness, capacity planning, and continuous improvement initiatives
• →Provide technical guidance and mentorship to junior engineers and support personnel.
• →Contribute to strategic modernization efforts and the design, architecture, and enhancement of enterprise voice and collaboration platforms
  

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