Senior Cisco Voice Engineer (TS/SCI)

B4Corp; Virginia; On-site; USD 252,000 - 308,000; Full time

Benefits offered by this job

PTO 7 weeks

401k matching

Phantom stock

Health insurance

Dental insurance

Vision insurance

Job summary

B4Corp in Dulles, VA is seeking a Systems Engineer with extensive Cisco Voice experience to design, deploy, secure, and sustain enterprise voice solutions in a highly secure environment. A TS/SCI clearance with polygraph is required, with core hours 9am–4pm and salary up to $280,000 per year.

Responsibilities include CUCM/Unity/UCCX design and deployment, PKI management, security accreditation, system upgrades, dial plan design, and collaboration with network teams to integrate telephony and

Qualifications

• 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, SRTP, SIP/MGCP/H.323, TCP/IP networking, MPLS transport environments, DNS/DHCP, RTP 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

Responsibilities

• Design, test, and deploy 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

Skills

SIP signaling

SRTP

SIP MGCP H.323

TCP/IP networking

MPLS networks

DNS/DHCP

RTP handling

Voice security

Education

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

Job description

B4Corp in Dulles, VA is seeking a Systems Engineer with extensive Cisco Voice experience to design, deploy, secure, and sustain enterprise voice solutions in a highly secure environment. A TS/SCI clearance with polygraph is required, with core hours 9am–4pm and salary up to $280,000 per year.

Responsibilities include CUCM/Unity/UCCX design and deployment, PKI management, security accreditation, system upgrades, dial plan design, and collaboration with network teams to integrate telephony and