Cisco Voice Engineer We are seeking an experienced Cisco Voice Engineer to support a mission critical, technology driven program for a key Government customer. This role focuses on designing, deploying, securing, and sustaining enterprise level Cisco Unified Communications solutions across a complex, highly secure environment. Key responsibilities include: Design, test, and deploy new Cisco Voice infrastructure (CUCM, Unity Connection, IM&P, UCCX). Implement next generation voice system technologies and support first article engineering. Participate in security accreditation activities for all voice systems. Manage PKI/certificate requirements across Cisco UC components. Perform system upgrades, patching, and lifecycle maintenance for hardware and software. Provide engineering support for new site standups, including dial plan design and endpoint provisioning. Design, test, and deploy call center technologies (UCCX/UCCE), including user training and transition planning. Execute tasks related to call routing, SIP trunking, SRST, CUBE, and gateway configuration. Collaborate with customers and internal teams to gather and refine system requirements. Ensure compliance with enterprise standards, policies, and security procedures. Work within a large scale enterprise IT environment with responsibilities specific to Cisco Voice and Unified Communications. Partner with network engineering and telecom teams on integration activities involving telephony, call center systems, and network infrastructure. Support secure communications devices and infrastructure, including VoIP phones, STEs, Viper phones, encryption devices, POTs/ISDN/leased lines, conference bridges, and call management servers. Required Education, Experience, & Skills: Bachelor's or Master's degree in Computer Science, IT, Engineering, or related field. Minimum of eleven (11) years of relevant Voice/UC engineering experience. Strong technical expertise in: SIP signaling and call flows, Secure Real Time Transport Protocol (SRTP), SIP, MGCP, H.323, TCP/IP networking, MPLS transport environments, DNS and DHCP, RTP media handling. Experience supporting secure, enterprise scale voice environments. Ability to troubleshoot complex call routing, signaling, and interoperability issues. Strong communication skills for documentation, requirements analysis, and customer interaction. Preferred Education, Experience, & Skills: Advanced expertise in SIP signaling, call flows, and multi vendor integration. Experience with H.323 in mixed protocol environments. Cisco Certified Collaboration Professional (CCCP) or equivalent Cisco Collaboration certifications: CCNP Collaboration, CCIE Collaboration (highly desirable). Avaya Communications Certification or experience supporting Avaya platforms in hybrid Cisco/Avaya environments. Experience with secure communications devices (VoIP endpoints, STEs, Viper phones, encryption devices). Familiarity with government security accreditation processes and PKI/certificate management. Experience designing or supporting call center technologies (Cisco UCCX/UCCE or Avaya equivalent). Sphinx Solutions Inc
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