Senior Cisco Voice Engineer

About the role

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.

Responsibilities

• 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 stand‑ups, 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.

Requirements

• Top Secret Clearance with Polygraph.
• Bachelor’s or Master’s degree in Computer Science, IT, Engineering, or a 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.

Preferred qualifications

• 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.