Principal Enterprise Voice Engineer

Description

Leidos is seeking a Principal Enterprise Voice Engineer to lead engineering, sustainment, maintenance, and operational support of enterprise IP voice and video communications.

This position requires extensive experience with enterprise unified communications, SIP signaling, call routing, network infrastructure, cybersecurity, and voice service interoperability. The engineer will collaborate with network, cybersecurity, systems engineering, and operations teams to ensure secure, reliable, and uninterrupted voice services.

The engineer will provide technical direction, review engineering designs and change packages, resolve complex escalations, and mentor less-experienced engineers. This is a senior technical position without formal supervisory responsibilities.

• Bachelor's degree or equivalent experience and 12+ years of prior relevant experience, or Master's degree with 10+ years of experience. Specific experience, education, and training may be considered in lieu of a degree.
• Current IAT Level II or higher certification, such as Security+ or CISSP.

• Active DoD Secret clearance.

• Serve as the senior technical authority for enterprise IP voice and video infrastructure.
• Lead the design, engineering, modernization, and technical implementation of Cisco, Avaya, Oracle, and associated voice technologies.
• Establish engineering standards, architecture requirements, configuration baselines, and technical implementation strategies.
• Review and approve complex engineering designs, system configurations, and technical solutions to ensure performance, security, scalability, and resiliency.
• Evaluate emerging technologies and provide modernization, lifecycle management, and capacity planning recommendations.

• Provide technical leadership for integrating enterprise voice services across routing, switching, WAN, firewall, and security infrastructure.
• Direct engineering solutions involving SIP signaling, media services, call routing, carrier interconnections, and multi-vendor interoperability.
• Lead technical assessments of IPsec, MPLS VPN, BGP, and QoS implementations supporting enterprise voice services.
• Collaborate with network and cybersecurity engineering teams to resolve complex infrastructure dependencies and security requirements.

• Serve as the highest-level technical escalation point for complex voice service incidents and engineering challenges.
• Lead advanced troubleshooting and root-cause analysis involving SIP signaling, call flows, media paths, routing, and network security.
• Direct corrective actions for major incidents, recurring problems, and systemic service reliability issues.
• Provide technical oversight for system maintenance, upgrades, capacity planning, and configuration management activities.

• Provide technical authority for reviewing and approving engineering changes, implementation strategies, and rollback procedures.
• Assess architectural risks, operational impacts, and service dependencies associated with enterprise voice infrastructure changes.
• Lead technical investigations and engineering improvements through established Problem and Change Management processes.
• Coordinate complex implementations and technical resolutions across engineering teams, operations, and customer stakeholders.

• Provide technical direction and engineering oversight for assigned projects, initiatives, and complex technical work streams.
• Establish and maintain enterprise voice engineering standards, architecture documentation, SOPs, and technical procedures.
• Review engineering deliverables and mentor less-experienced engineers through design reviews, troubleshooting, and knowledge transfer.
• Advise program leadership and government customers on technical risks, infrastructure improvements, and modernization strategies.

• Advanced experience engineering and supporting Cisco Unified Communications Manager (CUCM), Avaya Aura, Oracle Session Border Controllers (SBCs), and enterprise voice gateway technologies.
• Demonstrated expertise in SIP signaling, call routing, multi-vendor interoperability, and SBC-to-carrier interconnections.
• Strong knowledge of Secure Real-Time Transport Protocol (SRTP), G.711/G.729 codecs, and Dual-Tone Multi-Frequency (DTMF) signaling.
• Experience designing and engineering distributed firewall…