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Tier Three Engineer Jobs in Missouri (NOW HIRING)

Jobgether

You will collaborate closely with Tier 3 engineers and specialist teams to drive timely resolution of incidents and service requests. Your expertise across Microsoft technologies, infrastructure ...

Cyera

Senior Technical Support Engineer

Creve Coeur, MO · On-site +1

$90K - $110K/yr

Prepare high-quality Tier 3 or Engineering escalations that include technical evidence, reproduction steps, logs, environment details, severity, priority, customer impact, suspected root cause, and ...

Jobtailor

Unified Collaboration Engineer

California, MO · On-site

$110 - $160/hr

Responsibilities * Support UC Engineering and Operational support on the US Navy NMCI UC ... Responsibilities include Tier III resolution and support Tier IV, varying implementation projects ...

The Timberline Group

Sr Systems Engineer

Saint Louis, MO · On-site +1

$101K - $139K/yr

* Work with operational IT technical leads, senior developers to identify tasks and various needs ... Tier 3 support for Application Management systems in both non-prod and prod environments.

Vivos Holdings

Engineer Network

Saint Louis, MO · On-site

Summary: The Network Engineer designs, implements, and maintains secure, scalable, and high ... Tier 3 support and participate in on-call rotation. Supervisory Responsibilities: None Education ...

VIVOS HOLDINGS

Engineer Network

Saint Louis, MO · On-site

Summary: The Network Engineer designs, implements, and maintains secure, scalable, and high ... Tier 3 support and participate in on-call rotation. Supervisory Responsibilities: None Education ...

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Tier Three Engineer information

What is the difference between Tier Three Engineer vs Tier Two Engineer?

AspectTier Three EngineerTier Two Engineer
CertificationsAdvanced certifications (e.g., Cisco CCNP, CompTIA Network+)Entry to mid-level certifications (e.g., Cisco CCNA, CompTIA A+)
Work EnvironmentComplex troubleshooting, system design, and advanced supportRoutine maintenance, basic troubleshooting, and user support
Employer & Industry UsageIT service providers, large enterprises, network infrastructureSmall to medium businesses, internal IT teams
Search & Comparison IntentUnderstanding advanced support roles, career progressionBasic support roles, entry-level positions

In summary, a Tier Three Engineer handles more complex issues, requires advanced certifications, and works in larger, more technical environments compared to a Tier Two Engineer, who focuses on routine support and basic troubleshooting.

What is a Tier Three Engineer?

A Tier Three Engineer is a senior technical support or network engineer responsible for resolving complex issues that Tier One and Tier Two support cannot handle. They often troubleshoot advanced hardware, software, or network problems, and may work with specialized tools and certifications such as Cisco or Microsoft to ensure system stability and performance.

What are popular job titles related to Tier Three Engineer jobs in Missouri?

For Tier Three Engineer jobs in Missouri, the most frequently searched job titles are:

What job categories do people searching Tier Three Engineer jobs in Missouri look for?

The top searched job categories for Tier Three Engineer jobs in Missouri are:

What cities in Missouri are hiring for Tier Three Engineer jobs?

Cities in Missouri with the most Tier Three Engineer job openings:

Tier Three Engineer jobs near you
Infographic showing various Tier Three Engineer job openings in Missouri as of August 2026, with employment types broken down into 1% As Needed, 86% Full Time, 10% Part Time, and 3% Contract. Highlights an 94% Physical, 3% Hybrid, and 3% Remote job distribution.

Network Telecom Voice Analyst

Solution Partners, Inc.

Saint Louis, MO • On-site

Other

Posted 16 days ago

Job description

Provide Tier II support for enterprise Cisco voice, telecommunications, and collaboration environments. Serve as the primary escalation point for complex voice, network, and endpoint incidents involving Cisco Unified Communications, VoIP, SIP, Cisco IP phones, Webex, Jabber, and Jabra audio devices. Own incidents through resolution while collaborating with Service Desk, Network Engineering, Telecom teams, vendors, and business users.

Key Responsibilities
  • Provide Tier II operational support for Cisco Unified Communications, IP telephony, voice gateways, SIP trunks, Cisco IP phones, Webex Calling, Jabber, Unity voicemail, and collaboration platforms.
  • Troubleshoot voice services including registration failures, call routing, voicemail, extensions, hunt groups, conferencing, transfers, call forwarding, and extension mobility.
  • Diagnose and resolve voice quality issues including packet loss, jitter, latency, dropped calls, echo, one-way audio, and registration failures.
  • Troubleshoot Jabra headsets, speakerphones, USB/Bluetooth audio devices, firmware, connectivity, microphone, speaker, and audio quality issues.
  • Perform structured troubleshooting across endpoints, network connectivity, DHCP, DNS, VLANs, PoE, QoS, Cisco call-control infrastructure, SIP, and carrier services.
  • Support phone deployments, moves, adds, changes (MACDs), user onboarding, office relocations, hardware replacements, and asset management.
  • Own incidents from assignment through resolution while meeting SLA requirements and documenting root cause, troubleshooting steps, and resolutions within the ITSM platform.
  • Analyze recurring incidents, develop knowledge articles, and participate in major incident response and outage troubleshooting.
  • Escalate infrastructure and carrier issues to Tier III engineering and telecom vendors with complete documentation.
Required Technical Skills

Cisco Voice & Collaboration

  • Cisco Unified Communications Manager (CUCM)
  • Cisco Unity
  • Cisco Jabber
  • Cisco Webex Calling
  • Cisco IP Phones
  • SIP & VoIP
  • Voice Gateways
  • Call Routing & Voicemail

Networking

  • TCP/IP
  • VLANs
  • DHCP
  • DNS
  • QoS
  • PoE
  • Routing & Switching
  • Voice over LAN/WAN
  •  
Qualifications
  • 2-3 years supporting enterprise voice, telecom, networking, or unified communications environments.
  • 2+ years supporting Cisco Voice technologies.
  • Experience supporting geographically distributed enterprise environments.
  • Strong analytical, troubleshooting, communication, and customer service skills.
  • Ability to manage multiple priorities while collaborating with Network Engineering, Telecom, Vendors, and Service Desk teams.

Apply