Senior Network Voice Engineer - TS/SCI Clearance

CDW•Washington, DC

2d•$180,000 - $240,000

About The Position

The Senior Network / Voice Engineer supports enterprise network and voice communications infrastructure in a secure federal environment. The role requires an active TS/SCI clearance and combines core network engineering with hands-on support for voice systems, VoIP platforms, unified communications services, and voice equipment moves, adds, changes, and deletions. The position focuses on daily operations, troubleshooting, equipment configuration, user support, documentation, and coordination with network, telecom, cybersecurity, and mission stakeholders. The engineer supports voice and network services, maintains secure and reliable configurations, coordinates approved changes, and documents infrastructure and operational procedures. The role also provides technical guidance to junior technicians or support staff.

Requirements

Active TS/SCI clearance.
U.S. citizenship due to federal security requirements.
Hands-on experience supporting enterprise network and voice infrastructure in federal, defense, intelligence, or similarly secure environments.
Experience performing voice moves, adds, changes, and deletions for IP phones, extensions, voicemail, call routing, hunt groups, shared lines, and related telephony services.
Working knowledge of VoIP technologies, SIP, RTP, QoS, dial plans, gateways, trunks, voicemail systems, and unified communications platforms.
Strong understanding of TCP/IP, subnetting, VLANs, routing, switching, LAN/WAN connectivity, network segmentation, and troubleshooting.
Experience supporting Cisco or comparable network and voice technologies, such as Cisco Unified Communications Manager, Unity Connection, voice gateways, IP phones, CUBE/SBCs, routers, and switches.
Ability to troubleshoot voice and network issues using logs, packet captures, monitoring tools, call traces, command-line diagnostics, and vendor support resources.
Familiarity with secure configuration management, change control, incident management, vulnerability remediation, and documentation requirements in a federal environment.
Strong customer service and communication skills, including the ability to support end users, brief technical issues, and coordinate effectively with engineering teams and government stakeholders.

Nice To Haves

Bachelor’s degree in Computer Science, Information Technology, Telecommunications, Cybersecurity, Engineering, or a related technical discipline; additional relevant experience may be considered in lieu of a degree.
DoD 8570/8140 IAT Level II certification, such as Security+ CE, or ability to obtain it within program requirements.
Networking or collaboration certification such as CCNA, CCNP, CCNA Collaboration, CCNP Collaboration, or equivalent experience.
Experience with Cisco Unified Communications Manager, Cisco Unity Connection, Cisco Emergency Responder, Cisco Jabber/Webex, Microsoft Teams Phone, Avaya, or other enterprise voice platforms.
Experience with SIP trunks, PRI circuits, E911 requirements, analog gateways, paging systems, conference bridges, call recording, or contact center integrations.
Experience supporting classified voice environments, multi-site telephony deployments, secure facilities, and mission-critical operational support.
Familiarity with network monitoring, voice monitoring, and diagnostic tools such as RTMT, Wireshark, SolarWinds, Splunk, SNMP, SYSLOG, NetFlow, or comparable platforms.

Responsibilities

Perform moves, adds, changes, and deletions for voice equipment, user extensions, voicemail accounts, phones, call routing, hunt groups, shared lines, and related telephony services.
Install, configure, maintain, and troubleshoot IP phones, analog voice devices, voice gateways, call managers, session border controllers, voicemail systems, and unified communications components.
Support day-to-day voice operations, including provisioning, incident response, ticket resolution, user support, endpoint replacement, and coordination of voice service requests.
Troubleshoot voice quality and connectivity issues, including one-way audio, dropped calls, registration failures, latency, jitter, packet loss, codec mismatch, dial-plan issues, and PSTN/SIP trunk problems.
Support core network engineering tasks involving LAN/WAN connectivity, VLANs, routing, switching, firewall coordination, QoS, network segmentation, and secure network access.
Implement and maintain QoS policies to prioritize voice traffic across LAN, WAN, and wireless environments.
Coordinate with carriers, vendors, government customers, and internal technical teams on circuit issues, number assignments, porting activity, trunk configuration, and service restoration.
Create and maintain documentation for voice infrastructure, phone inventories, extension assignments, dial plans, call flows, topology diagrams, standard operating procedures, and change records.
Plan and execute approved network and voice changes through established change management processes while minimizing risk to mission operations.
Support cybersecurity and compliance requirements by maintaining secure configurations, assisting with vulnerability remediation, supporting audit requests, and following federal security standards and operational procedures.
Provide technical guidance to junior technicians or support staff on voice endpoint configuration, troubleshooting steps, and escalation procedures.