Senior Cisco Voice Engineer

Vosper Thornycroft Group; Virginia (MN); On-site; USD 100,000 - 130,000; Full time

Job summary

Vosper Thornycroft Group is looking for an experienced Cisco Voice Engineer in Virginia, Minnesota. The role involves designing and deploying enterprise-level Cisco Unified Communications solutions in a highly secure environment. Key responsibilities include managing PKI/certificate requirements and ensuring compliance with security procedures. The ideal candidate must hold a Top Secret Clearance with Polygraph and have at least six years of relevant engineering experience, alongside strong SIP signaling proficiency and leadership skills.

Qualifications

• Must have a Top Secret Clearance with Polygraph.
• Minimum of six years of progressive experience in Voice/UC engineering.
• Demonstrated experience leading enterprise-scale voice deployments and modernization efforts.
• Strong communication skills for stakeholder engagement, documentation, and technical leadership.

Responsibilities

• Design, test, and deploy new Cisco Voice infrastructure (CUCM, Unity Connection, IM&P, UCCX).
• Manage PKI/certificate requirements across Cisco UC components.
• Support secure communications devices and infrastructure.
• Collaborate with customers and internal teams to gather and refine system requirements.

Skills

SIP signaling and call flows

Secure Real Time Transport Protocol (SRTP)

TCP/IP networking

MPLS transport environments

DNS and DHCP

RTP media handling

Leading enterprise-scale voice deployments

Troubleshooting call routing issues

Education

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

Tools

Cisco Unified Communications solutions

VoIP phones

Job description

Overview

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.

What will you do?

• 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.

Do you have what it takes?

• 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

Preferred Education, Experience, & Skills:

• 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