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Systems Engineer; Voice

Job in Virginia, St. Louis County, Minnesota, 55792, USA
Listing for: Cornerstone Defense LLC
Full Time position
Listed on 2026-03-12
Job specializations:
  • Engineering
    Systems Engineer
Salary/Wage Range or Industry Benchmark: 60000 - 80000 USD Yearly USD 60000.00 80000.00 YEAR
Job Description & How to Apply Below
Position: Systems Engineer (Voice)

Title:

Systems Engineer (Voice)

Location:

Dulles, VA

Company Overview

Cornerstone Defense is the Employer of Choice within the Intelligence, Defense, and Space communities of the U.S. Government. Realizing early on that our most prized assets are our employees, we continually focus our attention on improving the overall work/life experience they have supporting the mission. Our Team is pushed every day to use their industry leading knowledge to provide end-to-end solutions to combat our nation’s toughest and most secure problems.

If you are looking for a place to not only be professionally challenged, but encouraged and supported by a company that cares, don’t look any further than Cornerstone Defense.

Benefits Overview
  • Medical, Dental and Vision Plans
  • Generous PTO Policy
  • 401(k)
  • HSA and FSA options
  • Life and Disability Insurance
  • Tuition Reimbursement and Training
  • Perks at Work Discount Program
  • Referral Program
  • Leads Generation Program
  • College America 529
  • Fitness Reimbursement Program
  • Travel Assistance
  • Norton Lifelock Benefit Solutions
  • Life Planning Financial & Legal Services
Required Education, Experience, & Skills

We are actively seeking Systems Engineers with a minimum of 3 years' experience. Undergraduate or graduate degree in computer science or computer engineering. Specific skills may include the following:

  • Work in an enterprise IT environment with specific tasks related to Voice
  • Collaborate with network engineering and other telecom engineers in integration activities involving telephony or call center
  • Assist in the design, testing, and deployment of new voice infrastructure
  • Support implementation of next-generation voice technologies
  • Participate in the system security accreditation process
  • Provide certificate management support for secure systems
  • Assist with system upgrades, patching, and configuration

    Support new site voice system standups
  • Support call center technology deployments, user training, and transition planning
  • Contribute to call routing and trunking design within enterprise voice platforms
  • Attend meetings with internal teams and clients to gather and understand voice system requirements
  • Monitor compliance with established standards, policies, and procedures
  • Gain hands‑on experience with secure voice devices (e.g., VoIP phones, STEs, Viper) and infrastructure components (e.g., PBXs, encryption devices, call management servers)
  • Learn to provide Tier 4 engineering support under supervision
  • Learn and support platforms such as Skype for Business, Avaya Communication Manager, and other enterprise call center technologies
Preferred Education, Experience, & Skills
  • Linux
  • SIP signaling and call flows
  • Secure Real-Time Transport Protocol
  • SIP
  • TCP/IP
  • H.323
  • DNS
  • DHCP
  • RTP
Certifications
  • MCSE certification
  • A+ certification
  • Network+ certification
  • CCNA, CCNP, ITIL, CCIE, HP, CCVP, CCDP, CATE, R&S
  • Cisco Voice certifications
  • Juniper certifications
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