Voice Systems Engineer – Secure Telephony & Enterprise

Cornerstone Defense LLC; Sterling (VA); On-site; USD 110,000 - 140,000; Full time

Benefits offered by this job

Medical plan

Dental plan

Vision plan

401(k)

Job summary

Cornerstone Defense LLC is seeking a Systems Engineer (Voice) to design, test, and deploy enterprise voice solutions in a secure IT environment. The role involves collaboration with network and telecom teams to integrate telephony and call center components.

The candidate will support voice system upgrades, participate in accreditation processes, and gain hands-on experience with VoIP devices and encryption infrastructure.

Qualifications

• Minimum of 3 years experience as a Systems Engineer.
• Experience with enterprise IT environments and voice-related integration tasks.
• Familiarity with VoIP infrastructure and voice platforms such as PBXs and call centers.

Responsibilities

• Design, test, and deploy voice infrastructure enhancements.
• Support implementation of next-generation voice technologies.
• Attend meetings with internal teams and clients to gather voice system requirements.
• Monitor compliance with standards, policies, and procedures.

Skills

VoIP

SIP signaling

Call routing

Enterprise voice

Security best practices

Education

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

Tools

Linux

SIP signaling

H.323

DNS

DHCP

RTP

Skype for Business

Avaya Communication Manager

PBXs

Encryption devices

Call management servers

Cisco Voice certifications

Juniper certifications

Job description

Cornerstone Defense LLC is seeking a Systems Engineer (Voice) to design, test, and deploy enterprise voice solutions in a secure IT environment. The role involves collaboration with network and telecom teams to integrate telephony and call center components.

The candidate will support voice system upgrades, participate in accreditation processes, and gain hands-on experience with VoIP devices and encryption infrastructure.