Systems Engineer (Voice) with Security Clearance

Cornerstone Defense; Sterling (VA); On-site; USD 95,000 - 125,000; Full time

Benefits offered by this job

Medical Plan

Dental Plan

Vision Plan

401(k)

HSA/FSA options

Life Insurance

Tuition Reimbursement

Training

Job summary

Cornerstone Defense in Dulles, VA is seeking a Systems Engineer (Voice) to design, test, and deploy enterprise voice infrastructure, collaborate with network and telecom engineers, and support telephony deployments across the enterprise.

The ideal candidate has 3+ years of systems engineering experience, a degree in computer science or computer engineering, and hands‑on experience with VoIP devices, call routing, and platforms such as Skype for Business or Avaya.

Qualifications

• 3 years of experience in systems engineering.
• Undergraduate or graduate degree in computer science or computer engineering.
• Experience with voice infrastructure design, testing, and deployment.

Responsibilities

• Design, test, and deploy enterprise voice infrastructure.
• Collaborate with network and telecom engineers on integration activities.
• Assist in the design, testing, and deployment of voice systems.
• Support implementation of voice technologies and platform upgrades.
• Attend meetings with internal teams and clients to gather voice requirements.

Skills

Voice systems

Telephony integration

VoIP deployment

Systems engineering

Team collaboration

Education

Bachelor's or Master's in Computer Science or Computer Engineering

Tools

Skype for Business

Avaya Communication Manager

PBX systems

Encryption devices

Job description

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