SIP Voice Engineer

Top Skills

1. VESTA NXT Call Handling Platform
2. Strong SIP Engineering Exp; can read SIP ladders, understands response codes, and knows how to work through vendor-specific differences in how SIP is implemented
3. Strengths in AudioCodes; configuring and managing. (Base level cert obtained or in progress)
4. Network engineering experience; TCP/IP, routing/switching, DNS, firewalls, BGP, and QoS for voice. Can design and troubleshoot the full voice path end to end.
5. Experience working in both Microsoft and Linux environments.

Description
SIP Voice Engineer - VESTA NXT Call Handling Platform
Role Overview
We're looking for a SIP Voice Engineer who bridges traditional network engineering with deep session-control expertise. You won't just configure phones, you understand the DNA of a SIP packet, how vendors uniquely interpret RFCs, and how to make disparate systems talk to each other. You'll own the network and SIP design for Motorola VESTA NXT deployments, collaborate directly with SIP vendors to build integration designs, configure AudioCodes SBCs, and lead complex, multi-team troubleshooting.
You'll start by shadowing the principal engineer to learn the standard AudioCodes-to-VESTA setup, internal tooling, and remote access environment. Within the first few months, you'd begin picking up escalations and custom SBC configurations independently. By month three, the expectation is you're running the full cycle - from discovery call through configuration and testing - without needing to pull in multiple people.
Over time, the goal is for this person to step into the initial customer kickoff calls and own the SBC/network design upfront - work that currently sits with the Solutions Architects. That shift moves the role from reactive troubleshooting into leading the design process directly.
Key Responsibilities
SBC Design & Configuration: Deploy, configure, and maintain AudioCodes Session Border Controllers (primarily M800C hardware) across diverse customer environments. Every integration is different - every PBX, every SIP trunk provider does something unique.
Vendor Integration: Partner directly with external SIP vendors and customer PBX teams to create, validate, and execute integration designs. Get on the phone, ask the right questions, and build the design on the first pass - not the third.
Advanced Troubleshooting: When a deployment goes sideways beyond the standard playbook, you're the escalation point. Analyze packet captures, dissect SIP ladder diagrams, resolve codec negotiation mismatches, and lead cross-functional troubleshooting across field engineers, solutions architects, and external vendors.
Network Design for Voice: Build network templates for SBC deployments, including firewall traversal, BGP routing (e.g., Verizon SIP trunk scenarios), QoS/CoS configurations, and routing between local and cloud SBCs.
Standards & Governance: Contribute to the standards and governance documentation that guides field teams on how to deploy and integrate, and help expand the decision-tree framework currently being built for customer onboarding questionnaires.
Additional Skills & Qualifications
Must Haves
Strong SIP Enigneering Exp; can read SIP ladders, understands response codes, and knows how to work through vendor-specific differences in how SIP is implemented
Hands-on AudioCodes SBC experience; configuring and managing. (Base level cert)
Network engineering background; TCP/IP, routing/switching, DNS, firewalls, BGP, and QoS for voice. Can design and troubleshoot the full voice path end to end.
Proficient with Wireshark; can dig into packet captures to troubleshoot call failures, one-way audio, registration issues, and codec mismatches.
Experience working in both Microsoft and Linux environments.
Can lead troubleshooting across multiple teams and communicate clearly with field engineers, solutions architects, and external vendors.
BEST (strong nice):
SD-WAN experience, particularly around voice traffic optimization
Fortinet firewalls
Nice to Haves
Cisco CUCM experience
Avaya or Mitel PBX =
Experience in 911 or NG911; location services, public safety call handling.
Familiarity with Docker, Kubernetes, and AWS; the cloud new platform runs on containers, not traditional VMs
Job Type & Location
This is a Contract position based out of Chicago, IL.
Pay and Benefits
The pay range for this position is $55.00 - $70.00/hr.
Eligibility requirements apply to some benefits and may depend on your job classification and length of employment. Benefits are subject to change and may be subject to specific elections, plan, or program terms. If eligible, the benefits available for this temporary role may include the following:
Medical, dental & vision
Critical Illness, Accident, and Hospital
401(k) Retirement Plan - Pre-tax and Roth post-tax contributions available
Life Insurance (Voluntary Life & AD&D for the employee and dependents)
Short and long-term disability
Health Spending Account (HSA)
Transportation benefits
Employee Assistance Program
Time Off/Leave (PTO, Vacation or Sick Leave)
Workplace Type
This is a fully remote position.
Application Deadline
This position is anticipated to close on Jun 19, 2026.

About TEKsystems

We're partners in transformation. We help clients activate ideas and solutions to take advantage of a new world of opportunity. We are a team of 80,000 strong, working with over 6,000 clients, including 80% of the Fortune 500, across North America, Europe and Asia. As an industry leader in Full-Stack Technology Services, Talent Services, and real-world application, we work with progressive leaders to drive change. That's the power of true partnership. TEKsystems is an Allegis Group company.

The company is an equal opportunity employer and will consider all applications without regards to race, sex, age, color, religion, national origin, veteran status, disability, sexual orientation, gender identity, genetic information or any characteristic protected by law.

About TEKsystems and TEKsystems Global Services

We're a leading provider of business and technology services. We accelerate business transformation for our customers. Our expertise in strategy, design, execution and operations unlocks business value through a range of solutions. We're a team of 80,000 strong, working with over 6,000 customers, including 80% of the Fortune 500 across North America, Europe and Asia, who partner with us for our scale, full-stack capabilities and speed. We're strategic thinkers, hands-on collaborators, helping customers capitalize on change and master the momentum of technology. We're building tomorrow by delivering business outcomes and making positive impacts in our global communities. TEKsystems and TEKsystems Global Services are Allegis Group companies. Learn more at TEKsystems.com.

The company is an equal opportunity employer and will consider all applications without regard to race, sex, age, color, religion, national origin, veteran status, disability, sexual orientation, gender identity, genetic information or any characteristic protected by law.

San Francisco Fair Chance Ordinance: Pursuant to the San Francisco Fair Chance Ordinance, for all positions located in the city and county of San Francisco, we will consider for employment qualified applicants with arrest and conviction records.

Massachusetts Lie Detector: It is unlawful in Massachusetts to require or administer a lie detector test as a condition of employment or continued employment. An employer who violates this law shall be subject to criminal penalties and civil liability.

Use of Artificial Intelligence (AI): We may use Artificial Intelligence (AI) to support parts of our hiring process, including sourcing, screening, and evaluating candidates. AI helps assess applications and qualifications, but final decisions are made by our hiring team. By applying, you acknowledge and agree that your application may be reviewed using AI tools.