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Cornerstone Defense

60 Cornerstone Defense Systems Engineer Jobs Hiring Near You

Cornerstone Defense

Systems Engineer

Chantilly, VA · On-site

Systems Engineer Location: Chantilly, VA *Clearance: *Active TS/SCI w/ Polygraph needed to apply ... Cornerstone Defense is the Employer of Choice within the Intelligence, Defense, and Space ...

Cornerstone Defense

Systems Engineer

Sunnyvale, CA · On-site

$100K - $130K/yr

Systems Engineer Location : Sunnyvale, CA Security Clearance: Secret Required to start (Will ... Cornerstone Defense is the Employer of Choice within the Intelligence, Defense, and Space ...

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Infographic showing various Systems Engineer job openings at Cornerstone Defense in the United States as of August 2026, with employment types broken down into 100% Contract. Highlights an 100% Physical job distribution.

Systems Engineer (Voice)

Cornerstone Defense

Dulles, VA • On-site

Other

Medical, Dental, Vision, Life, Retirement, PTO

Re-posted 19 days ago

Job description

  • Location: Dulles, Virginia
  • Type: Contract
  • Job #3949

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 :
Cornerstone Defense offers a very comprehensive benefits package including, but not limited to: 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 * CollegeAmerica 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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