Top 141 Desktop support Jobs in Belleville Il

VoIP Technician - Tier III
Gabbit, LLC —Olivette, MO
- $85,000 - $95,000 a year
- Full-time
- Background check
- 3 years
- Analysis skills
- Paid training
- Health insurance
Quick Apply
3d
Technical Account Manager (Tier 3)
Certified NETS, Inc. —St. Louis, MO
- $55,000 - $65,000 a year
- Overtime
- Mid-level
- Office
- Bachelor's degree
- Paid holidays
- Health insurance
Quick Apply
1d
Data Center Technician Level 2 (m/f/d)
Hemmersbach Nordamerika —St. Louis, MO
- $25 - $28 an hour
- Full-time
- Mid-level
- Driver's License
- 2 years
- Disability insurance
- Health insurance
Quick Apply
Fleet Management Specialist
Keystone Staffing —St. Louis, MO
- $65,000 - $70,000 a year
- Full-time
- Up to 50% travel
- ERP systems
- Mid-level
- Health insurance
- Dental insurance
Quick Apply
IT Retail Service Support Manager
Busey Bank —Edwardsville, IL
- $63,000 - $87,000 a year
- Full-time
- Mid-level
- 3 years
- High school diploma or GED
- Profit sharing
- Wellness program
Quick Apply
Technical Support Engineer (Service Desk Engineer)
GadellNet —St. Louis, MO
- $45,000 - $60,000 a year
- 8 hour shift
- Hybrid work
- Research
- Mid-level
- Office
- Health insurance
- Dental insurance
Quick Apply
Network Engineer / NOC Engineer
Strategic Staffing Solutions —St. Louis, MO
- $32 - $42 an hour
- 12 hour shift
- Hybrid work
- Mid-level
- Office
- Analysis skills
- Health savings account
- Health insurance
Quick Apply
1d
Defense Red Switch Network (DRSN) Support Technician III
Leidos —Scott AFB, IL
- $48,100 - $86,950 a year
- Full-time
- Microsoft Outlook
- High school diploma or GED
- Analysis skills
9h
IT Associate I - Service Desk
Stifel —St. Louis, MO
- Full-time
- Microsoft Outlook
- High school diploma or GED
- In-person
- Health insurance
- Dental insurance
Jr. Helpdesk Technician
Persistent Technology, Inc. —Scott AFB, IL
- Full-time
- HIPAA
- Mid-level
- Microsoft Office
Quick Apply
IT Technician (Inventory Support)
Missouri Eastern District Court —St. Louis, MO
- $45,835 - $90,608 a year
- Computer science
- Computer Science
- Word processing
- Free parking
- Commuter assistance
3d
IT Help Desk Analyst
Hogan Transportation —St. Louis, MO
- On call
- Word processing
- Research
- Mid-level
- Health insurance
- Dental insurance
IT Support Associate II, Ops Tech Solutions (OTS)
Amazon.com Services LLC —Edwardsville, IL
- Full-time
- Mid-level
- Windows
- Paid parental leave
- Health insurance
Computer User Support Specialist
SAIC —Scott AFB, IL
- $40,001 - $80,000 a year
- Full-time
- Research
- Mid-level
- Office
Help Desk Technician I
Sunstar Insurance Group LLC —St. Louis, MO
- Remote
- Microsoft Outlook
- Windows
- Organizational skills
Quick Apply
2d
Desktop Technician II
Bi-State Development Agency —St. Louis, MO
- $46,800 - $58,500 a year
- Full-time
- Computer science
- Computer Science
- Mid-level
- Wellness program
- Paid holidays
Desktop Support Specialist
nscglobal, usa —St. Louis, MO
- Urgently hiring
- Mid-level
- Windows
- Commercial
- Paid time off
Quick Apply
IT Support Technician
Chameleon Integrated Services —Scott AFB, IL
- $40,000 - $55,000 a year
- Mid-level
- Office
- Windows
- Disability insurance
- Health insurance
Quick Apply
IT Service Desk Analyst
Design Group —St. Louis, MO
- Full-time
- Background check
- 5 years
- Pass drug screening
11d
Network Operations Center Support Analyst
Global Enterprise Services, LLC —Swansea, IL
- Microsoft Outlook
- High school
- Military
Quick Apply

I want to receive the latest job alert for desktop support in belleville il

By signing in to your account, you agree to SimplyHired's Terms of Service and consent to our Cookie and Privacy Policy.

Explore jobs in more locations

desktop support jobs near belleville il

VoIP Technician - Tier III

Gabbit, LLC
Olivette, MO

Quick Apply

Job Details

Full-time
$85,000 - $95,000 a year
3 days ago

Benefits

Paid training
Health insurance
Dental insurance
401(k)
Paid time off
On-the-job training
Vision insurance
401(k) matching

Qualifications

Customer communication
Technical documentation
CCNA
Incident Escalation
Troubleshooting audio issues
VLAN
Firewall
Bachelor's degree
Quality issues
Problem-solving
CompTIA Network+
Customer support ticket management
AV system troubleshooting
Voice over internet protocol (VoIP) configuration
Linux
Technical writing experience within technology
Escalation handling
Network Address Translation (NAT)

Full Job Description

Job Summary

We are seeking an experienced Tier III VoIP Technician to provide advanced technical support for our voice and network environments. This position serves as a senior escalation point for complex VoIP, SIP, RTP, and network-related issues that cannot be resolved through standard Tier I or Tier II troubleshooting.

The ideal candidate has a strong understanding of SIP-based voice communications, IP networking, and real-time media troubleshooting. This individual should be comfortable analyzing packet captures, diagnosing call-flow and audio issues, working directly with customers, and taking ownership of technically challenging cases through resolution.

Key Responsibilities

Serve as a Tier III escalation point for complex VoIP, network, and customer-impacting technical issues.
Troubleshoot SIP signaling, registration, authentication, call routing, call setup, and call teardown issues.
Diagnose RTP and media-related problems, including one-way audio, no audio, intermittent audio, latency, jitter, and packet loss.
Analyze SIP traces, call logs, packet captures, and other diagnostic information to determine root cause.
Use tools such as Wireshark and related network diagnostic utilities to troubleshoot signaling and media problems.
Troubleshoot network connectivity and voice-quality issues involving TCP/IP, UDP, DNS, DHCP, NAT, VLANs, routing, firewalls, and QoS.
Identify problems involving customer networks, firewalls, routers, switches, SIP devices, carriers, and upstream service providers.
Work directly with customers to gather technical information, reproduce issues, explain findings, and coordinate resolution.
Take ownership of escalated cases from initial investigation through resolution and customer communication.
Collaborate with internal support, engineering, operations, and network teams on complex or recurring technical issues.
Escalate carrier or vendor-related issues when appropriate and provide the technical evidence necessary to drive resolution.
Document troubleshooting steps, root causes, resolutions, and relevant technical findings in support tickets.
Identify recurring problems and recommend improvements to processes, documentation, monitoring, or system configuration.
Assist Tier I and Tier II technicians with advanced troubleshooting and technical guidance.
Contribute to internal knowledge-base documentation and troubleshooting procedures.

Required Qualifications (MUST HAVE)

1) Advanced understanding of SIP signaling and RTP media.

2) Ability to read and interpret SIP call flows, headers, response codes, SDP, and related signaling information.

3) Experience analyzing packet captures using Wireshark or similar tools.

4) Strong understanding of IP networking concepts, including:

TCP/IP and UDP
DNS and DHCP
NAT
VLANs
Routing and subnetting
Firewalls and access-control rules
QoS and traffic prioritization

5) Experience troubleshooting voice-quality issues such as latency, jitter, packet loss, one-way audio, and dropped calls.

6) Ability to distinguish between application, endpoint, network, carrier, and customer-environment issues.

7) Minimum of 3 years of experience working directly with customers on complex technical problems.

8) Strong written and verbal communication skills, including the ability to explain technical issues clearly to both technical and non-technical audiences.

9) Strong analytical and problem-solving skills with the ability to independently investigate complex issues.

10) Ability to manage multiple escalated cases while maintaining accurate technical documentation.

Preferred Qualifications

Experience supporting hosted or cloud-based VoIP platforms.
Experience with SIP trunks, SBCs, IP phones, ATAs, and related voice infrastructure.
Familiarity with common PBX and unified communications platforms.
Experience troubleshooting carrier and PSTN-related call-routing issues.
Familiarity with Linux command-line troubleshooting.
Experience with network monitoring, logging, or centralized diagnostic platforms.
Networking or VoIP certifications such as CCNA, Network+, SIP School, or equivalent practical experience.
Previous experience in a Tier III, senior technical support, NOC, telecom, or network engineering environment.

What Success Looks Like

A successful Tier III VoIP Technician can take an ambiguous customer-reported voice problem, methodically isolate the issue, gather and interpret the necessary technical evidence, identify the root cause, and drive the issue to resolution.

This role requires someone who is comfortable going beyond scripted troubleshooting and understands how voice applications, SIP signaling, RTP media, and IP networks interact in real-world environments.

Ideal Candidate

You are naturally curious and persistent when troubleshooting difficult technical problems. You do not stop at identifying a symptom—you want to understand why the problem occurred and how to prevent it from happening again.

You are equally comfortable reviewing a SIP trace or packet capture and communicating with a customer about what is happening. You take ownership of escalations, document your findings clearly, and work effectively across teams to resolve complex issues.

Pay: $85,000.00 - $95,000.00 per year

Benefits:

401(k)
401(k) matching
Dental insurance
Health insurance
On-the-job training
Paid time off
Vision insurance

Education:

Bachelor's (Required)

Experience:

VoIP systems support: 3 years (Required)

Ability to Commute:

Olivette, MO 63132 (Required)

Work Location: In person

Quick Apply

Refine Your Search

desktop support jobs in belleville il

VoIP Technician - Tier III

Technical Account Manager (Tier 3)

Data Center Technician Level 2 (m/f/d)

Fleet Management Specialist

IT Retail Service Support Manager

Technical Support Engineer (Service Desk Engineer)

Network Engineer / NOC Engineer

Defense Red Switch Network (DRSN) Support Technician III

IT Associate I - Service Desk

Jr. Helpdesk Technician

IT Technician (Inventory Support)

IT Help Desk Analyst

IT Support Associate II, Ops Tech Solutions (OTS)

Computer User Support Specialist

Help Desk Technician I

Desktop Technician II

Desktop Support Specialist

IT Support Technician

IT Service Desk Analyst

Network Operations Center Support Analyst

I want to receive the latest job alert for desktop support in belleville il

Related Searches

Explore jobs in more locations

Job Seeker Tools

Employer Tools

Browse

Stay Connected