Senior Voice Engineer

🔥 17 hours ago

🇺🇸 United States – Remote

💵 $131.3k - $237.3k / year

⏰ Full Time

🟠 Senior

👷🏻‍♀️ Engineer

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Leidos

WebsiteLinkedInAll Job Openings

10,000+ employees

Founded 1969

🏥 Healthcare

💼 Consulting

📦 Logistics

Healthcare • Consulting • Logistics

Leidos is a leading systems integrator in science, technology, and engineering, providing solutions that transform and enable the missions of its customers. The company operates across various markets, including aviation, defense, energy, government, healthcare, intelligence, science, and space. Leidos is involved in AI, digital modernization, cyber operations, and integrated and mission software systems. With a commitment to diversity, equity, inclusion, and sustainability, Leidos also engages in charitable efforts and community enrichment programs. Additionally, it contributes to developing solutions for counter-unmanned aerial systems and electric vehicle infrastructure for military applications.

📋 Description

• Serve as the senior escalation point for complex voice incidents and analyze complete SIP dialogs to isolate signaling failures across multi-hop call paths • Troubleshoot advanced call flows including transfers, call forking, hunt and pilot groups, conferencing, call park, shared lines, simultaneous ring, emergency calling, and cloud/hybrid routing through multiple SBCs • Diagnose SDP offer/answer and codec negotiation failures, early media, DTMF mismatches, SRTP key exchange problems, one-way/no-way audio, and media anchoring or bypass issues • Interpret and manipulate SIP headers and develop SBC message manipulation and normalization rules • Use Wireshark/TShark, SBC debug and trace tools, call-control platform traces, call-detail records, and ladder diagrams to reconstruct call flows and document root cause • Deliver written root-cause analyses with permanent corrective actions and feed lessons learned into shared design standards and operating procedures • Perform and document DISA STIG and SRG compliance assessments for voice, UC, and SBC systems • Use DISA STIG Viewer, SCAP Compliance Checker, Evaluate-STIG, and authenticated vulnerability scans to maintain STIG checklists and validate findings • Develop remediation, harden configurations, and build secure configuration baselines • Provide voice-specific technical input for RMF packages, POA&Ms, and ATO activities • Implement and troubleshoot SIP over TLS, mutual TLS, SRTP, certificate and PKI management, and secure trunking • Troubleshoot Layer 2/3 networking, NAT, firewall, traversal, QoS, packet loss, jitter, latency, and MTU issues affecting voice • Author and review high- and low-level designs, implementation procedures, test plans, and rollback plans; approve designs produced by other engineers • Architect and integrate IP telephony, SIP trunking, and SBC platforms including Cisco Unified Communications Manager, Cisco CUBE, AudioCodes Mediant, and Ribbon SBC • Architect enterprise dial plans, E.164 normalization, digit manipulation, route patterns, and carrier/PSTN interconnections • Design integrations with Microsoft Teams Phone, Webex Calling, and comparable cloud platforms • Mentor and guide other engineers through design reviews, configuration peer reviews, and knowledge transfer • Lead technical engagements with manufacturers, carriers, and SIP service providers • Serve as voice engineering subject matter expert across multiple DoD contracts and prioritize technical work across programs • Develop common voice architectures, STIG-compliant baselines, and SIP normalization standards across contracts and customers • Contribute to roadmaps, modernization strategies, capture/proposal efforts, solution designs, bills of material, and level-of-effort estimates • Brief program managers, government customers, and executive leadership on technical risks, recommendations, and solution tradeoffs

🎯 Requirements

• Bachelor's degree and 12 or more years of relevant experience, or a Master's degree and 10 or more years, in VoIP, enterprise telephony, unified communications, network engineering, or a closely related discipline • Additional relevant experience and certifications may be considered in lieu of a degree • Active Secret clearance required to be considered • Ability to obtain an IAT Level II certification (e.g., CompTIA Security+ CE) within the period required by the contract • Expert-level, hands-on experience analyzing SIP dialogs and SDP negotiation in packet captures and platform traces to resolve complex, multi-hop call-flow failures • Demonstrated experience performing DISA STIG compliance checks, completing STIG checklists, and remediating findings on voice, UC, or network infrastructure • Solid working knowledge of enterprise switching and routing, including VLANs, trunking, Spanning Tree, routing protocols, ACLs, NAT, and QoS • Hands-on experience with at least one enterprise call-control platform and at least one enterprise SBC • Ability to explain complex technical issues, risks, and recommendations clearly to engineers, customers, and program and executive leadership across multiple programs, and build consensus • Advanced knowledge of SIP, SDP, RTP/RTCP, SRTP, TLS, H.323, MGCP, and ISDN/PRI, including relevant IETF RFCs • Experience with DISA STIG Viewer, SCAP Compliance Checker, Evaluate-STIG, ACAS/Tenable Nessus, and RMF artifacts • Familiarity with SD-WAN, MPLS, and carrier transport as they affect voice and video quality • Familiarity with VTC and collaboration endpoints such as Cisco Room Series, Poly, and Microsoft Teams Rooms • Scripting experience with Python, PowerShell, or REST/AXL APIs • Experience supporting large-scale, geographically distributed, highly available DoD or mission-critical voice networks • Preferred certifications include CCNP Collaboration or CCIE Collaboration, CCNA or equivalent networking certification, and CompTIA Security+ CE or another DoD 8140 IAT Level II certification

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