Enterprise Voice Engineer III

The Enterprise Voice Engineer will perform sustainment, maintenance, Problem and Change management services to help ensure secure, reliable, and uninterrupted availability of DISA Voice Services.Primary Responsibilities:Responsible for performing and training the team on the following duties: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 principles.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.Develop 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.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 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 and 4-8 years of prior relevant experience or Masters with 2-6 years of prior relevant experience. (Or equivalent combination of education and/or experience.)

#J-18808-Ljbffr