Senior Cisco Voice Engineer

VTG•Dulles Town Center, VA

About The Position

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.

Requirements

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

Nice To Haves

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

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 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.