We are seeking experienced Cisco Voice Engineers 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.

• 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.

• Must have a Top Secret Clearance with Polygraph

• Bachelor’s or Master’s degree in Computer Science, IT, Engineering, or related field

• Minimum of six (6) years of progressive experience in Voice/UC engineering

• Expert-level proficiency in SIP signaling and call flows

• Expert-level proficiency in Secure Real Time Transport Protocol (SRTP)

• Expert-level proficiency in SIP, MGCP, and H.323

• Expert-level proficiency in TCP/IP networking

• Expert-level proficiency in MPLS transport environments

• Expert-level proficiency in DNS and DHCP

• Expert-level proficiency in RTP media handling

• Demonstrated experience leading enterprise-scale voice deployments and modernization efforts

• Proven ability to troubleshoot complex, multi-layered call routing and signaling issues

• Strong communication skills for stakeholder engagement, documentation, and technical leadership

• Expertise in SIP signaling, call flows, and multi-vendor integration

• Hands-on experience with H.323 in mixed protocol environments

• Cisco Certified Collaboration Professional (CCCP) or equivalent Cisco Collaboration certifications

• CCNP Collaboration certification

• CCIE Collaboration certification (highly desirable)

• Avaya Communications certification or experience supporting Avaya platforms in hybrid Cisco/Avaya environments

• Experience with secure communications devices such as VoIP endpoints, STEs, Viper phones, and encryption devices

• Familiarity with government security accreditation processes and PKI/certificate management

• Experience designing or supporting call center technologies (Cisco UCCX/UCCE or Avaya equivalents)

• Prior experience in a DoD, IC, or other high-security environment