Our customer, the Defense Information Systems Agency (DISA), provides, operates, and assures command and control of the Defense Information System Network (DISN) services to its customers, the department of Defense (DoD) and national security organizations. This position directly supports the DISA-provided capabilities and services.
The Leidos Digital Modernization Sector/Global Solutions Management-Operations II (GSMO-II) contract has an opening for an Enterprise Voice Engineer in Scott AFB, IL. 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.
This position requires U.S. citizenship and an active TS/SCI to start.
**The anticipated salary range for this position is $80,000 to $90,000**
Primary Responsibilities:
Responsible for performing 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 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.)
GSMO
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:February 19, 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.
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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.
