> Markdown version of [/jobs/ext/1907730-voip-engineer-secret-clearance-required](https://www.wearedevelopers.com/jobs/ext/1907730-voip-engineer-secret-clearance-required). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # VoIP Engineer - Secret Clearance REQUIRED - **Company:** RCG, Inc. - **Location:** Washington, DC, United States - **Experience:** Experienced - **Salary:** $130,000.0 - $145,000.0 - **Contract:** Permanent contract - **Skills:** VoIP, Cisco Unified Communications Manager, Jabber, Routing, Cisco WebEx, Wi-Fi Technology, Data Logging, Internet Protocol Telephony, Firewalls (Computer Science), SC Clearance, Information Technology, Cisco - **Published:** August 3, 2026 - **Apply:** https://diversityjobs.com/main/sendform/8/8/28176/1/17803675?backUrl=%2Fcareer%2F17803675%2FVoip-Engineer-Secret-Clearance-Required-D-C-Washington ## About the Role * Active Secret Clearance (or higher). * U.S. Citizenship required. * Bachelor's degree in computer science, Engineering, Information Technology, Business Management, or a related field (or equivalent experience). * Minimum four (4) years of experience supporting enterprise VoIP and Video Teleconferencing (VTC) environments. * Must hold DoD 8570/8140-Compliant Certification * Experience administering enterprise VoIP and unified communications infrastructure. * Experience supporting: + VoIP call processors + Softphones + Wi-Fi phones + Voice gateways + E911 systems * Experience performing telecommunications Moves, Adds, and Changes (MAC). * Experience with Cisco Unified Communications Manager (CUCM), 15.0 preferred. * Experience with Cisco Unity Connection. * Experience with Cisco Jabber. * Strong understanding of voice networking, routing, switching, and telephony systems. * Excellent troubleshooting, analytical, and problem-solving skills. * Strong written and verbal communication skills. * Ability to manage multiple priorities in a fast-paced environment. * Ability to participate in an on-call rotation and occasional evening or weekend support., * Experience supporting federal government telecommunications environments. * Experience administering SIP trunk and voice gateways. * Experience with telecommunications security and voice firewalls. * Experience migrating VoIP systems in modernization efforts. * Experience in Teams Telephony or similar virtual cloud PBX solution (e.g. Webex, Broadworks) ## Description RCG is seeking a VoIP Engineer with an active Secret clearance to support an ongoing federal contract in Washington, DC. This is a full-time, 100% on-site position requiring five (5) days per week in the office. The selected candidate will design, implement, maintain, and optimize enterprise voice communications infrastructure, including VoIP, unified communications, E911 services, and telephony systems supporting mission-critical federal operations throughout the Washington, DC metropolitan area. What You'll Do * Design, install, configure, maintain, and support enterprise VoIP and telephony infrastructure. * Work with Federal clients on migration to modern architecture (e.g. Teams telephony). * Perform operational support and sustaining engineering for analog, digital, and VoIP telephone systems. * Install, configure, and maintain telephone system hardware, cabling, software, and associated infrastructure. * Support Moves, Adds, and Changes (MAC) activities across multiple customer locations. * Configure and maintain VoIP phones, softphones, Wi-Fi phones, call processors, gateway systems, and E911 services. * Maintain VoIP system interfaces and perform programming to ensure seamless connectivity. * Administer telephone firewall logging, monitoring, and security policies. * Maintain E911 infrastructure and emergency call routing. * Maintain EBS (Emergency Broadcast System). * Provide translations and routing for cellular and remote VoIP 911 services. * Monitor trunk utilization and recommend capacity improvements. * Generate telephone call detail reports and provide near real-time reporting for authorized personnel. * Support voice mail platforms, automated attendants, announcements, broadcast lists, and user messaging services. * Configure and maintain enterprise telephony features including: + Call forwarding + Call transfer + Three-way and six-way conferencing + Hunt groups + Call park + Call pickup + Caller ID + Speed dial + Voicemail services * Develop user guides, operating procedures, and technical documentation. * Provide operator services, directory assistance, and conference call support. * Protect customer privacy and telecommunications security. * Participate in after-hours support, scheduled maintenance windows, and an on-call rotation. * Support major customer events requiring evening or weekend coverage. ## Related Videos - [Unlocking the potential of Digital & IT at Vodafone](https://www.wearedevelopers.com/videos/602-unlocking-the-potential-of-digital-it-at-vodafone) - [Getting under the skin: The Social Engineering techniques](https://www.wearedevelopers.com/videos/38-getting-under-the-skin-the-social-engineering-techniques) - [How Cisco embraced a DevOps culture within its network engineering team](https://www.wearedevelopers.com/videos/99-how-cisco-embraced-a-devops-culture-within-its-network-engineering-team) - [Computer Vision from the Edge to the Cloud done easy](https://www.wearedevelopers.com/videos/263-computer-vision-from-the-edge-to-the-cloud-done-easy) - [Your Infrastructure Is Not a Playground: AI Agents for Infra Done Right](https://www.wearedevelopers.com/videos/2084-your-infrastructure-is-not-a-playground-ai-agents-for-infra-done-right) ## Related Articles - [Remote Work: Best Practices for Developers](https://www.wearedevelopers.com/magazine/315-remote-work-best-practices-for-developers) - [Fully Remote Software Engineer Jobs](https://www.wearedevelopers.com/magazine/447-fully-remote-software-engineer-jobs) - [Dev Digest 134 - Where pixels sing?](https://www.wearedevelopers.com/magazine/477-dev-digest-134-where-pixels-sing) - [Highest Paying Tech Companies for Developers](https://www.wearedevelopers.com/magazine/220-highest-paying-tech-companies-for-developers) - [Best Paying Remote Jobs](https://www.wearedevelopers.com/magazine/255-best-paying-remote-jobs) - [Tips on mastering remote job interviews](https://www.wearedevelopers.com/magazine/23-tips-on-mastering-remote-job-interviews)