Leidos is seeking an experienced Voice / VoIP Architect to provide senior-level technical leadership, architectural oversight, and strategic direction for enterprise voice and unified communications services supporting NASA’s mission and corporate environments. This role is central to designing, evolving, and modernizing large-scale telephony platforms, including hybrid and cloud-based voice architectures and the transition from legacy Cisco environments to Microsoft Teams Telephony.
The selected candidate will serve as the lead architect for enterprise voice services, responsible for end-to-end design, integration, migration, and optimization of VoIP and unified communications platforms. This includes deep expertise in SIP-based communications, secure voice architectures, and large-scale, mission-critical deployments.
Key Responsibilities
- Lead architecture and design of enterprise voice and VoIP solutions across on-premise, hybrid, and cloud environments.
- Define and execute migration strategies from legacy PBX/Cisco UC platforms to Microsoft Teams Telephony.
- Architect SIP trunking solutions, including secure TLS/SRTP communications between enterprise platforms.
- Serve as the senior technical authority for voice call flows, signaling, and cross-platform interoperability.
- Design and implement Session Border Controller (SBC) architectures (Cisco CUBE, Oracle SBC, etc.).
- Ensure secure voice architecture including certificates, encryption, firewall traversal, and compliance requirements.
- Integrate voice services across LAN/WAN, SD-WAN, and cloud network environments with proper QoS and prioritization.
- Perform capacity planning and traffic analysis to ensure scalability, resiliency, and performance.
- Provide Tier 3 escalation support for complex VoIP, SIP, and gateway issues.
- Develop architectural standards, roadmaps, and lifecycle strategies for enterprise voice services.
- Deliver executive-level technical briefings and mentor engineering teams.
- Bachelor’s degree in Engineering, Computer Science, or related field (Master’s preferred).
- 10–15+ years of experience in enterprise voice/VoIP engineering or architecture.
- Proven experience supporting large-scale telephony deployments and migrations, including Cisco to Microsoft Teams Telephony.
- VoIP Protocols & Standards: Expert-level understanding of SIP, RTP/RTCP, H.323, and codec technologies (G.711, G.729, Opus).
- Networking Fundamentals: Strong knowledge of TCP/IP, VLANs, QoS, MPLS, SD-WAN, and routing protocols (BGP, OSPF) for voice traffic prioritization.
- Platforms & Vendors:
- Cisco Unified Communications Manager (CUCM)
- Cisco Unified Border Element (CUBE) / SBCs
- Microsoft Teams Telephony
- Experience with Avaya or similar enterprise voice platforms
- SIP & Security:
- SIP trunk configuration (Cisco & Microsoft environments)
- TLS/SRTP implementation
- Certificate management and PKI
- Firewall traversal and rule implementation
- Strong troubleshooting skills using protocol analyzers (SIP traces, packet captures, call flow analysis).
Preferred Qualifications
• Experience with
Akkadian Provisioning Manager
Oracle SBC
Microsoft Survivable Branch Appliance (SBA)
Cisco Unified Contact Center (UCCX/UCCE)
• Security & Compliance: Familiarity with PCI, HIPAA, and secure voice recording requirements.
• Hybrid/Cloud Voice: Experience designing hybrid VoIP architectures integrating on-prem PBX with cloud platforms (Microsoft Teams, Direct Routing).
• Experience supporting government or NASA environments.
• Active Secret Clearance.
• Relevant certifications (e.g., Microsoft Teams Voice Engineer, CCNP Collaboration, etc.).
If you're looking for comfort, keep scrolling. At Leidos, we outthink, outbuild, and outpace the status quo — because the mission demands it. We're not hiring followers. We're recruiting the ones who disrupt, provoke, and refuse to fail. Step 10 is ancient history. We're already at step 30 — and moving faster than anyone else dares.
Original Posting:April 24, 2026For U.S. Positions: While subject to change based on business needs, Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date of no earlier than 3 days after the original posting date as listed above.
The Leidos pay range for this job level is a general guideline only and not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law.
Skills Required
- Bachelor's degree in Engineering, Computer Science, or related field (Master's preferred)
- 10-15+ years of experience in enterprise voice/VoIP engineering or architecture
- Expert-level understanding of SIP, RTP/RTCP, H.323, and codec technologies like G.711, G.729, Opus
- Strong knowledge of TCP/IP, VLANs, QoS, MPLS, SD-WAN, and routing protocols
- Experience with Cisco Unified Communications Manager (CUCM) and Microsoft Teams Telephony
- SIP trunk configuration and TLS/SRTP implementation
- Strong troubleshooting skills using protocol analyzers
- Experience with Oracle SBC and Microsoft Survivable Branch Appliance
- Active Secret Clearance
Leidos Compensation & Benefits Highlights
The following summarizes recurring compensation and benefits themes identified from responses generated by popular LLMs to common candidate questions about Leidos and has not been reviewed or approved by Leidos.
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Healthcare Strength — Healthcare coverage is described as comprehensive, with multiple plan options, low office-visit copays in some plans, and access to mental health and wellness support tools. The availability of HSA/FSA options and employer contributions is positioned as a meaningful part of the total package.
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Retirement Support — Retirement benefits are framed as a strong component of total rewards, highlighted by a 401(k) match and immediate vesting in the standard package. The Employee Stock Purchase Plan is also presented as an additional long-term wealth-building feature.
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Wellbeing & Lifestyle Benefits — Wellbeing and lifestyle supports extend beyond core insurance, including wellness programs, fitness-related stipends, and assistance resources. Work flexibility and related perks are also included as part of the broader rewards experience.
Leidos Insights
What We Do
We Are Leidos For 50 years we have been tackling some of the biggest problems that face our nation and our world. OUR MISSION Through our culture of innovation and history of performance, we develop deep customer trust built on integrity and create enduring solutions that improve our world. Leidos is a science and technology solutions leader working to address some of the world’s toughest challenges in the defense, intelligence, homeland security, civil, and healthcare markets. The company’s 43,000 employees support vital missions for government and commercial customers. Headquartered in Reston, Va., Leidos reported annual revenues of approximately $11.09 billion for the fiscal year ended January 3, 2020. Leidos was cited for the meaningful work employees perform that is challenging, impactful, and aligned with our customers’ missions as reasons professionals want to work and stay at our company. Leidos has also been named to lists including Forbes’ Best Employers for Diversity, Forbes’ America’s Best Employers for Women, Military Times Best for Vets Employers, and Ethisphere Institute’s World's Most Ethical Companies®. Employees enjoy career enrichment opportunities available through mobility and development and experience rewarding relationships with supportive supervisors and talented colleagues and customers. Employees appreciate our flexible work environment, allowing for and encouraging a true work-life balance. Our professionals are also excited about our Employee Resource Groups, like the newly launched Collaborative Outreach with Remote and Embedded Employees (CORE), which strives to create an environment where every employee, regardless of location, feels fully engaged as a valued employee of Leidos. Your most important work is ahead.
