> Markdown version of [/jobs/ext/2773156-senior-voip-engineer](https://www.wearedevelopers.com/jobs/ext/2773156-senior-voip-engineer). 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). --- # Senior VoIP Engineer - **Company:** Open SAN Consulting (OSC) - **Location:** Quantico, VA, United States - **Experience:** Expert - **Contract:** Permanent contract - **Skills:** VoIP, Cisco Unified Communications Manager, H.323 Protocol, IPv4, Session Initiation Protocols, Media Gateway Control Protocol (MGCP), Routing, Public Switched Telephone Networks, Signalling Connection Control Part (SCCP), Systems Integration, Computer Network Operations, Cisco - **Published:** September 7, 2026 - **Apply:** https://www.clearancejobs.com/jobs/9147985/senior-voip-engineer ## About the Role * Must have and maintain a TOP SECRET clearance and must be eligible for a TS/SCI * High School diploma or equivalent * Five (5) or more years of experience designing, building, and/or maintaining communications systems with a minimum of three (3) years of experience with CISCO Unified Communications Manager (CUCM) Version 12+ or newer * Cisco Certified Network Professional (CCNP) and 60 days to get the CCNP Collaboration or successful completion of the CLCOR exam * Prior experience with Cisco Unity, Cisco Presences, Cisco Emergency Responder * Knowledge of Cisco UCCX * Prior experience with dynamic and static IPv4 routing and integrating with an external SIP provider * Proficient with SIP, SCCP, MGCP, DSN, PSTN, and H.323 systems and devices * Must be DoD 8570 certified at the IAT-II / IAM-II level. Please refer to the website: https://public.cyber.mil/cw/cwmp/dod-approved-8570-baseline-certifications ## Description As a Senior VoIP Engineer, the individual will oversee and manage all components of the Cisco Unified Communication Manager cluster. In this role, the Engineer will monitor and control the performance and status of voice and video resources across multiple enclaves and locations utilizing software and hardware tools. In addition, the individual will work to ensure all voice applicable STIGs and vulnerabilities are resolved or mitigated in a timely manner. Major Activities (Typical Duties/Responsibilities) * Performs testing, provision, operations and emergency responses for voice network operations * Designs, configures, and installs VoIP hardware/software replacements and upgrades * Develops and maintains all VoIP documentation (drawings, cut sheets, configurations, and deployment plans) * Identifies and diagnoses problems and factors affecting voice services * Provides day-to-day subject matter expert support for RKB tenant agencies * Troubleshoots voice related issues and outages, which may occur during non-core hours * Works with vendors in support of the ITCSU * Performs preventative maintenance services on all devices within the VoIP area of responsibility * Maintains a current understanding of emerging technologies and trends in voice and video services * Performs other tasks as required by OSC and the Government contracting office ## Related Videos - [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) - [Getting under the skin: The Social Engineering techniques](https://www.wearedevelopers.com/videos/38-getting-under-the-skin-the-social-engineering-techniques) - [IP Authentication: A Tale of Performance Pitfalls and Challenges in Prod](https://www.wearedevelopers.com/videos/1413-ip-authentication-a-tale-of-performance-pitfalls-and-challenges-in-prod) - [What makes Cybersecurity different for critical infrastructure?](https://www.wearedevelopers.com/videos/571-what-makes-cybersecurity-different-for-critical-infrastructure) - [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) - [From Bedside Beeps to Interoperable Bytes – Getting your medical devices ready to talk the IEEE 11073 language](https://www.wearedevelopers.com/videos/771-from-bedside-beeps-to-interoperable-bytes-getting-your-medical-devices-ready-to-talk-the-ieee-11073-language) ## Related Articles - [How We Built a Worry-Free System That Runs for 10+ Years – And What We’d Do Again](https://www.wearedevelopers.com/magazine/751-how-we-built-a-worry-free-system-that-runs-for-10-years-and-what-we-d-do-again) - [Best US AI Conferences for CTOs in 2026: Build vs. Buy, Vendor Evaluation, and Peer Intelligence](https://www.wearedevelopers.com/magazine/736-best-us-ai-conferences-for-ctos-in-2026-build-vs-buy-vendor-evaluation-and-peer-intelligence) - [Highest Paying Tech Companies for Developers](https://www.wearedevelopers.com/magazine/220-highest-paying-tech-companies-for-developers) - [Dev Digest 134 - Where pixels sing?](https://www.wearedevelopers.com/magazine/477-dev-digest-134-where-pixels-sing) - [7 Important Tips That Every Software Developer Should Know](https://www.wearedevelopers.com/magazine/101-7-important-tips-that-every-software-developer-should-know) - [Best Paying Jobs in Technology](https://www.wearedevelopers.com/magazine/256-best-paying-jobs-in-technology)