Senior Voice Engineer

Leidos

. Serve as the senior escalation point for complex voice incidents and analyze complete SIP dialogs to isolate signaling failures across multi-hop call paths .

Posted 11/3/2026full-timeRemote • United StatesSenior💰 $131,300 - $237,350 per yearWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expert-level proficiency in SIP analysis, troubleshooting complex voice incidents, and performing DISA STIG compliance assessments. Capable of architecting and integrating enterprise telephony solutions while providing technical leadership and mentorship across teams.

Highest-signal resume keywords

SIP AnalysisDISA STIG ComplianceVoIP TroubleshootingEnterprise Telephony ArchitectureTechnical Leadership

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

SIPSDPRTP/RTCPSRTPTLSPythonPowerShellNetwork EngineeringVoIPUnified Communications

Soft Skills

Technical CommunicationMentoringConsensus Building

Tools & Technologies

WiresharkTSharkDISA STIG ViewerSCAP Compliance CheckerCisco Unified Communications ManagerCisco CUBEAudioCodes MediantRibbon SBCMicrosoft Teams PhoneWebex Calling

Certifications & Qualifications

CompTIA Security+ CECCNP CollaborationCCIE CollaborationCCNA

Industry Keywords

Voice NetworksDoD ContractsMulti-hop Call FlowsCloud RoutingEmergency CallingVTCCollaboration EndpointsNetwork Infrastructure

Tech Stack

Tools & technologies

CloudPythonSwitchingVoIP

About the role

Key responsibilities & impact

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

What you’ll need

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