Enterprise Voice Engineer II with Security Clearance

RMantra Solutions; Illinois; On-site; USD 85,000 - 120,000; Full time

Job summary

RMantra Solutions is seeking an experienced engineer to maintain a large IP voice and video communications infrastructure. You will configure and troubleshoot voice, video, and data networks, including calling search spaces, route plans, and device profiles.

The role requires DoD 8750 IAT II or Security+ CE certification and an active Secret clearance, with hands-on experience across CUCM, Unity, CUBE, SBC, and Avaya Aura platforms. Strong SIP and QoS skills are essential.

Qualifications

• BS degree and 2–4 years of relevant experience, or a Master's with less than 2 years.
• DoD 8750 certification at IAT level II, Security+ CE or equivalent.
• Active Secret security clearance required.
• Experience with Cisco, Avaya, or Oracle voice platforms (CUCM, Unity, CUBE, SBC, Avaya Aura).
• Expertise in SIP signaling and call flows.
• Experience with SRTP and QoS concepts (preferred).

Responsibilities

• Maintain and support a large IP voice, video, and data network.
• Configure and troubleshoot voice, video, and data networks end-to-end.
• Configure and optimize calling search spaces, route plans, partitions, and device profiles.
• Configure Cisco or Juniper routing and switching devices.
• Support distributed firewall infrastructure and security policies.
• Develop technical policy, work instructions, and reporting for the enterprise IP telephony network.
• Analyze SIP signaling and call flows to resolve complex issues.
• Resolve remote site registration, signaling, and media problems.
• Validate change requests and document changes accurately.
• Perform fault analysis and configuration of voice subscribers, call handlers, and routing rules.

Skills

SIP signaling

Fault analysis

Routing & switching

Security

Documentation

WAN principles

Education

BS degree in a related field

Master's degree (optional)

Tools

CUCM

Cisco Unity

CUBE

Oracle SBC

Avaya Aura

Firewall concepts

Job description

Primary Responsibilities

Perform engineering tasks to maintain a large, complex and highly resilient IP voice and video communications infrastructure.

• Manage, configure, troubleshoot and assure service supporting all aspects of a voice, video and data network. Must be organized, document oriented, possess skills in diagramming, and understand WAN principals.
• Perform system maintenance, support capacity planning activities and complete configuration change actions and documentation efforts.
• Configure and implement calling search spaces, route plans, route partitions, route lists and device profiles.
• Configure Cisco or Juniper routing and switching devices.
• Support distributed firewall infrastructure.
• Provide input in the development of technical policy, work instructions and reporting in support of an enterprise IP telephony network.
• Analyze and resolve complex technical problems utilizing foundational knowledge of SIP signaling and call-flows.
• Analyze and resolve remote site registration, signaling and media problems.
• Configure route plans, route lists, device profiles, calling search spaces, and route partitions.
• Validate change requests and ensure accuracy.
• Perform fault analysis and configuration of voice subscribers, call handlers and call routing rules.
• Perform fault analysis and configuration of Cisco and or Juniper routing and switching rules. Basic Qualifications: * Currently possess DoD 8750 certification at IAT level II, Security+ CE or equivalent to meet requirement.
• Experience with one or multiple Cisco, Avaya or Oracle voice platforms including Cisco Unified Communications Manager (CUCM), Cisco Unity, Cisco Unified Border Element (CUBE), Oracle Session Border Controller (SBC) and Avaya Aura Application Server.
• Expertise in SIP internetworking signaling and call flow.
• Demonstrable experience of advanced fault analysis to isolate and diagnose network problems for routing, switching, security and large scale voice implementations.
• Currently possess an active Secret security clearance. Preferred Qualifications * Working knowledge of Secure Real-Time Transport Protocol (SRTP) including associated G.711 and G.729 codecs and Digital Tone Multi Frequency (DTMF).
• Experience with Cisco Unified Communications Manager and or Avaya Aura soft switches.
• Experience with Oracle SBCs and other voice media gateway appliances.
• Experience supporting distributed firewall infrastructure.
• Experience creating/supporting IPSec MPLS VPN infrastructure
• Experience implementing and supporting BGP routing protocols
• Experience designing, configuring and troubleshooting QoS classification, marking and prioritization of network traffic (voice, critical applications, etc.).
• Familiarity with IPSec implementation and troubleshooting. Required Education and Experience: * Requires BS degree and 2-4 years of prior relevant experience or Masters with less than 2 years of prior relevant experience. (Or equivalent combination of education and/or experience.)