Sr. UC Systems Engineer

VAE INC; Sierra Vista (AZ); On-site; USD 110,000 - 140,000; Full time

Job summary

VAE, Inc. is seeking a senior Unified Communications (UC) Systems Engineer to act as the enterprise SME for large-scale VoIP architecture, modernization, migration, and sustainment across Army environments.

This role provides senior technical leadership, oversees complex implementations, and serves as the escalation point for advanced UC challenges, ensuring interoperability between legacy and next-generation systems with high availability in mission-critical settings.

Qualifications

• Active Secret Security Clearance is required.
• DoD 8570/8140 compliant certification (e.g., Security+) is required.
• 8–10+ years of progressive Unified Communications / VoIP engineering experience.
• Demonstrated experience as a technical lead or SME in large UC environments.

Responsibilities

• Lead the design and architecture of large-scale VoIP and Unified Communications solutions.
• Develop comprehensive system engineering plans, technical documentation, and modernization roadmaps.
• Provide authoritative guidance on enterprise voice design standards, scalability, resiliency, and performance optimization.
• Translate operational requirements into technical architectures and deployment strategies.
• Provide oversight for deployments, migrations, and decommissioning efforts.
• Ensure seamless integration of UC systems into enterprise network and virtualized environments.
• Lead technical planning for upgrades, expansions, and technology refresh initiatives.
• Oversee high-availability configurations and redundancy strategies for mission-critical voice systems.
• Serve as Tier 3/4 escalation point for complex VoIP and interoperability issues.
• Lead root cause analysis and drive systemic corrective actions.
• Guide implementation and validation of STIGs and security hardening for UC systems.
• Architect and troubleshoot UC systems and equipment.
• Design and optimize dial plans, call routing, and SIP dial peers.
• Integrate legacy TDM systems within modern VoIP architectures.

Skills

VoIP engineering

Unified Communications

CUCM / Ribbon AS

CUBE / Ribbon SBC

SIP & dial peers

IP networking

Security+ / DoD 8570

Leadership / SME

Education

Bachelor’s degree in a technical discipline

Tools

CUCM / Ribbon AS

Cisco Unity Connection / Ribbon Media Server

CUBE / Ribbon SBC

SIP tracing / diagnostic tools

Job description

VAE, Inc. is looking for aÂUnified Communications (UC) Systems Engineer to serve as the enterprise Subject Matter Expert (SME). This role provides senior-level technical leadership for large-scale Voice over IP (VoIP) architecture, modernization, migration, and sustainment initiatives across Army enterprise environments. The UC SME guides architecture decisions, oversees complex implementations, and serves as the senior escalation point for advanced voice and unified communications challenges. This position plays a critical role in modernizing Army voice infrastructure, ensuring interoperability between legacy and next-generation systems, and maintaining resilient, high-availability communications capabilities in mission-critical environments.Â

Responsibilities include:

• Lead the design and architecture of large-scale VoIP and Unified Communications solutions.
• Develop comprehensive system engineering plans, technical documentation, and modernization roadmaps.
• Provide authoritative guidance on enterprise voice design standards, scalability, resiliency, and performance optimization.
• Translate operational requirements into technical architectures and deployment strategies.
• Provide oversight and technical direction for system deployments, migrations, and decommissioning efforts.
• Ensure seamless integration of UC systems into enterprise network and virtualized environments.
• Lead technical planning for upgrades, expansions, and technology refresh initiatives.
• Oversee high-availability configurations and redundancy strategies for mission-critical voice systems.
• Serve as Tier 3/4 escalation point for complex VoIP and interoperability issues.
• Lead root cause analysis efforts and drive systemic corrective actions.
• Provide technical leadership for non-standard voice operations and specialized configurations.
• Guide implementation and validation of STIGs and security hardening measures for UC systems.
• Architect and troubleshoot Unified Communications Systems and equipment.
• Design and optimize dial plans, call routing, translations/transformations, and SIP dial peers.
• Integrate legacy Time-Division Multiplexing (TDM) systems within modern VoIP architectures.
• Oversee virtualization and UC platform configuration within virtualized environments.
• Ensure interoperability across IP networking environments and enterprise infrastructure.

• Active Secret Security Clearance
• DoD 8570/8140 compliant certification (e.g., Security+)
• 8â10+ years of progressive Unified Communications / VoIP engineering experience
• Demonstrated experience serving as a technical lead or SME in large-scale UC environments
• Deep expertise in:
  • Cisco Unified Communications Manager (CUCM) &/or Ribbon AS
  • Cisco Unity Connection &/or Ribbon Media Server
  • Cisco Unified Border Element (CUBE) &/or Ribbon SBC
  • SIP, dial plans, call routing, and dial peers
  • Enterprise VoIP architecture and IP networking
• Experience integrating and sustaining legacy TDM systems
• Bachelorâs degree in a technical discipline or equivalent professional experience

Equal employment opportunity, including veterans and individuals with disabilities.