Supports enterprise network and voice infrastructure in a secure federal environment. Responsibilities include configuring and troubleshooting VoIP systems, IP phones, gateways, call managers, unified communications, LAN/WAN connectivity, routing, switching, VLANs, QoS, and SIP trunks. The engineer performs voice service changes, incident response, user support, documentation, change management, vulnerability remediation, and coordination with carriers, vendors, government customers, and technical teams. Active TS/SCI clearance and U.S. citizenship are required.
Description
The Senior Network / Voice Engineer will support enterprise network and voice communications infrastructure within a secure federal environment. This role requires an active TS/SCI clearance and is ideal for a candidate with a strong foundation in core network engineering who also has hands-on experience supporting voice systems, VoIP platforms, unified communications services, and voice equipment moves, adds, and changes. The position will focus on reliable day-to-day operations, technical troubleshooting, equipment configuration, user support, documentation, and coordination with network, telecom, cybersecurity, and mission stakeholders. Key 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, including 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 to support circuit issues, number assignments, porting activity, trunk configuration, and service restoration.
* Create and maintain accurate 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 for voice endpoint configuration, troubleshooting steps, and escalation procedures. Required Qualifications
* Active TS/SCI clearance required.
* U.S. citizenship required 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 core networking concepts, including 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 with the ability to support end users, brief technical issues, and coordinate effectively with engineering teams and government stakeholders. Preferred Qualifications
* 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 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. Pay range: $180,000 - $240,000 depending on experience and skill set. Benefits overview: [CDW Benefits](https://cdw.benefit-info.com/) Salary ranges may be subject to geographic differentials.
* CDW is committed to being an AI-fluent organization
* We're looking for people who bring curiosity, a learner's mindset, and a willingness to engage with ever-evolving technology and tools. We value adopting AI as a partner, openness to experimentation, and a shared interest in learning together on AI. Our goal is to create a culture where AI enhances- not replaces- human creativity and decision-making. You don't need to be an expert today; what matters is your readiness to explore, adapt, and grow with us as we integrate AI responsibly and effectively into our work.Additionally, CDW is committed to fostering an equitable, transparent, and respectful hiring process for all applicants. During our application process, our goal is to understand your experience, strengths, skills, and qualifications. As an AI forward company, we see AI not just as a tool, but as a catalyst for new ways of thinking, creating, and communicating. We encourage candidates to embrace an AI mindset, one that's curious, adaptive, and ready to explore what's possible. We welcome thoughtful use of AI to expand your perspective and elevate how you share your story, while ensuring your application remains rooted in your own background, judgment, and voice.
* About Us
* CDW is a Fortune 500 technology solutions provider that helps businesses, government, education, and healthcare organizations achieve what's possible through technology. What makes CDW different isn't just what we do- it's how we do it. At CDW we act as one- building trust, speaking candidly, and working together to achieve more. We play to win- focusing on what matters most and delivering for our customers. And we think forward- staying curious, moving fast, and continuously learning. We believe meaningful work happens when people feel supported, heard, and empowered to contribute. That's why we think of ourselves as coworkers, not just employees- working together to solve complex challenges and deliver real impact for our customers and communities. As a full-stack, full-lifecycle technology partner, CDW brings deep expertise, strong relationships, and broad industry knowledge to help turn ideas into outcomes. When you join CDW, you become part of a collaborative environment where your work matters, your growth is supported, and your contributions help shape what's next. Together, we deliver the full promise of what technology can do.
* Together, we Make Amazing Happen.
* CDW is an equal opportunity employer. All qualified applicants will receive consideration for employment without regards to race, color, religion, sex, sexual orientation, gender identity, national origin, disability status, protected veteran status or any other basis prohibited by state and local law.
The Senior Network / Voice Engineer will support enterprise network and voice communications infrastructure within a secure federal environment. This role requires an active TS/SCI clearance and is ideal for a candidate with a strong foundation in core network engineering who also has hands-on experience supporting voice systems, VoIP platforms, unified communications services, and voice equipment moves, adds, and changes. The position will focus on reliable day-to-day operations, technical troubleshooting, equipment configuration, user support, documentation, and coordination with network, telecom, cybersecurity, and mission stakeholders. Key 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, including 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 to support circuit issues, number assignments, porting activity, trunk configuration, and service restoration.
* Create and maintain accurate 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 for voice endpoint configuration, troubleshooting steps, and escalation procedures. Required Qualifications
* Active TS/SCI clearance required.
* U.S. citizenship required 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 core networking concepts, including 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 with the ability to support end users, brief technical issues, and coordinate effectively with engineering teams and government stakeholders. Preferred Qualifications
* 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 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. Pay range: $180,000 - $240,000 depending on experience and skill set. Benefits overview: [CDW Benefits](https://cdw.benefit-info.com/) Salary ranges may be subject to geographic differentials.
* CDW is committed to being an AI-fluent organization
* We're looking for people who bring curiosity, a learner's mindset, and a willingness to engage with ever-evolving technology and tools. We value adopting AI as a partner, openness to experimentation, and a shared interest in learning together on AI. Our goal is to create a culture where AI enhances- not replaces- human creativity and decision-making. You don't need to be an expert today; what matters is your readiness to explore, adapt, and grow with us as we integrate AI responsibly and effectively into our work.Additionally, CDW is committed to fostering an equitable, transparent, and respectful hiring process for all applicants. During our application process, our goal is to understand your experience, strengths, skills, and qualifications. As an AI forward company, we see AI not just as a tool, but as a catalyst for new ways of thinking, creating, and communicating. We encourage candidates to embrace an AI mindset, one that's curious, adaptive, and ready to explore what's possible. We welcome thoughtful use of AI to expand your perspective and elevate how you share your story, while ensuring your application remains rooted in your own background, judgment, and voice.
* About Us
* CDW is a Fortune 500 technology solutions provider that helps businesses, government, education, and healthcare organizations achieve what's possible through technology. What makes CDW different isn't just what we do- it's how we do it. At CDW we act as one- building trust, speaking candidly, and working together to achieve more. We play to win- focusing on what matters most and delivering for our customers. And we think forward- staying curious, moving fast, and continuously learning. We believe meaningful work happens when people feel supported, heard, and empowered to contribute. That's why we think of ourselves as coworkers, not just employees- working together to solve complex challenges and deliver real impact for our customers and communities. As a full-stack, full-lifecycle technology partner, CDW brings deep expertise, strong relationships, and broad industry knowledge to help turn ideas into outcomes. When you join CDW, you become part of a collaborative environment where your work matters, your growth is supported, and your contributions help shape what's next. Together, we deliver the full promise of what technology can do.
* Together, we Make Amazing Happen.
* CDW is an equal opportunity employer. All qualified applicants will receive consideration for employment without regards to race, color, religion, sex, sexual orientation, gender identity, national origin, disability status, protected veteran status or any other basis prohibited by state and local law.
CDW Vernon Hills, Illinois, USA Office
200 N. Milwaukee Ave., Vernon Hills, IL, United States, 60061
CDW Chicago, Illinois, USA Office
625 W Adams St., Chicago, IL, United States, 60661
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