Top 205 system engineer Jobs in belleville, il

Enterprise Voice Engineer II
Leidos —Scott AFB, IL
- $59,150 - $106,925 a year
- Full-time
- Bachelor of Science
- Mid-level
- Master's degree
Manufacturing Systems Engineer
Accelera —St. Louis, MO
- $40.19 - $54.47 an hour
- Full-time
- Mid-level
- Travel
- Associate's degree
Quick Apply
14d
Systems Engineer - Mid-Level
Assured Consulting Solutions —St. Louis, MO
- $120,000 - $160,000 a year
- Full-time
- 6 years
- Computer Science
- Mid-level
Quick Apply
9d
Research & Development Engineer
Basler Electric Company —Highland, IL
- $131,000 - $150,500 a year
- Full-time
- Background check
- Computer literacy
- Writing skills
- Paid jury duty
- AD&D insurance
Quick Apply
Network/SATCOM Engineer
CACI —St. Louis, MO
- $75,200 - $158,100 a year
- Weekends as needed
- Research
- 8 years
- Analysis skills
- Health insurance
Cloud Operations System Administrator
Boeing —Swansea, IL
- $80,000 - $96,050 a year
- On call
- Hybrid work
- DevOps
- 3 years
- AWS
- Health savings account
- Disability insurance
Infrastructure Specialist
Stellar IT Solutions LLC —St. Louis, MO
- $50 - $55 an hour
- Contract
- Remote
- Computer Science
- Bachelor's degree
- Mentoring
Quick Apply
Service Desk - SME
G2IT —O'Fallon, IL
- $70,000 - $75,000 a year
- Mid-level
- Team management
- 4 years
Network Engineer III
FEDITC LLC —Scott AFB, IL
- $125,000 - $150,000 a year
- Full-time
- 7 years
- Bachelor of Science
- System design
- Disability insurance
- Health insurance
Quick Apply
Implementations Network Engineer
BAE Systems Inc. —Scott AFB, IL
- $72,150 - $122,655 a year
- Full-time
- Bachelor of Science
- Mid-level
- Master's degree
- Health savings account
- Paid holidays
IT Systems Engineer
Fairmount Park Casino & Racing —Collinsville, IL
- $70,000 - $90,000 a year
- Full-time
- Mid-level
- Windows
- 3 years
- Health insurance
- Dental insurance
Quick Apply
Systems Administrator
BAE Systems Inc. —St. Louis, MO
- $107,359 - $182,510 a year
- Full-time
- Bachelor of Science
- High school diploma or GED
- AWS
- Health savings account
- Paid holidays
Cloud Systems Engineer
SAIC —Scott AFB, IL
- $80,001 - $120,000 a year
- Full-time
- Azure
- Mentoring
- In-person
9d
Implementations/Activations Network Engineer
BAE Systems Inc. —Scott AFB, IL
- $72,150 - $122,655 a year
- Full-time
- Customer service
- Bachelor of Science
- Mid-level
- Health savings account
- Paid holidays
RHEL/Windows System Administrator - Fulltime/Permanent
Fabergent —Belleville, IL
- Full-time
- Management
- Bachelor of Science
- 3 years
Quick Apply
Implementations Network Engineer III
Isys Technologies —Scott AFB, IL
- $85,000 - $92,500 a year
- Full-time
- Bachelor of Science
- Ability to climb stairs
- Master's degree
Systems Engineer 2-3 (Associate/Mid-Level)
UNCOMN —O'Fallon, IL
- $75,000 - $95,000 a year
- Hybrid work
- Computer Science
- Engineering
- Mid-level
- Paid holidays
- Health insurance
Implementations/Activations Network Engineer II
Isys Technologies —Scott AFB, IL
- $70,000 - $75,500 a year
- Full-time
- Bachelor of Science
- Mid-level
- Ability to climb stairs
Project Manager - Power Systems Engineer
Basler Electric Company —Highland, IL
- $96,000 - $113,000 a year
- Full-time
- Background check
- Management
- System design
- Paid jury duty
- AD&D insurance
Quick Apply
Patent Attorney / Patent Agent / Engineering Physics / Fully Remote MO 63104 4115
IP Recruiter Group —St. Louis, MO
- Email
- Background check
- Bachelor of Science
- Engineering
Quick Apply

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system engineer jobs near belleville, il

Enterprise Voice Engineer II

Leidos -
Scott AFB, IL

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Job Details

Full-time
$59,150 - $106,925 a year

Qualifications

Telecommunications network troubleshooting
Cisco Unified Communications
Cisco routers/switches implementation
Voice over internet protocol (VoIP) configuration
Problem management
Technical troubleshooting support
IAT
IAT Level II
Failure analysis

Full Job Description

Description

Our customer, the Defense Information Systems Agency (DISA), provides, operates, and assures command and control of the Defense Information System Network (DISN) services to its customers, the department of Defense (DoD) and national security organizations. This position directly supports the DISA-provided capabilities and services.

The Leidos Digital Modernization Sector/Global Solutions Management-Operations II (GSMO-II) contract has an opening for an Enterprise Voice Engineer in Scott AFB, IL. The Enterprise Voice Engineer will perform sustainment, maintenance, Problem and Change management services to help ensure secure, reliable, and uninterrupted availability of DISA Voice Services.

This position requires U.S. citizenship and an active TS/SCI to start.

**The anticipated salary range for this position is $80,000 to $90,000**

Primary Responsibilities:
Responsible for performing the following duties:

Perform engineering tasks to maintain a large, complex and highly resilient IP voice and video communications infrastructure.
Manage, configure, troubleshoot and assure service supporting all aspects of a voice, video and data network. Must be organized, document oriented, possess skills in diagramming, and understand WAN principals.
Perform system maintenance, support capacity planning activities and complete configuration change actions and documentation efforts.
Configure and implement calling search spaces, route plans, route partitions, route lists and device profiles.
Configure Cisco or Juniper routing and switching devices.
Support distributed firewall infrastructure.
Provide input in the development of technical policy, work instructions and reporting in support of an enterprise IP telephony network.
Analyze and resolve complex technical problems utilizing foundational knowledge of SIP signaling and call-flows.
Analyze and resolve remote site registration, signaling and media problems.
Configure route plans, route lists, device profiles, calling search spaces, and route partitions.
Validate change requests and ensure accuracy.
Perform fault analysis and configuration of voice subscribers, call handlers and call routing rules.
Perform fault analysis and configuration of Cisco and or Juniper routing and switching rules.

Basic Qualifications:

Currently possess DoD 8750 certification at IAT level II, Security+ CE or equivalent to meet requirement.
Experience with one or multiple Cisco, Avaya or Oracle voice platforms including Cisco Unified Communications Manager (CUCM), Cisco Unity, Cisco Unified Border Element (CUBE), Oracle Session Border Controller (SBC) and Avaya Aura Application Server.
Expertise in SIP internetworking signaling and call flow.
Demonstrable experience of advanced fault analysis to isolate and diagnose network problems for routing, switching, security and large scale voice implementations.
Currently possess an active TS/SCI security clearance.

Preferred Qualifications:

Working knowledge of Secure Real-Time Transport Protocol (SRTP) including associated G.711 and G.729 codecs and Digital Tone Multi Frequency (DTMF).
Experience with Cisco Unified Communications Manager and or Avaya Aura soft switches.
Experience with Oracle SBCs and other voice media gateway appliances.
Experience supporting distributed firewall infrastructure.
Experience creating/supporting IPSec MPLS VPN infrastructure
Experience implementing and supporting BGP routing protocols
Experience designing, configuring and troubleshooting QoS classification, marking and prioritization of network traffic (voice, critical applications, etc.).
Familiarity with IPSec implementation and troubleshooting.

Required Education and Experience:

Requires BS degree and 2-4 years of prior relevant experience or Masters with less than 2 years of prior relevant experience. (Or equivalent combination of education and/or experience.)

GSMO

If you're looking for comfort, keep scrolling. At Leidos, we outthink, outbuild, and outpace the status quo — because the mission demands it. We're not hiring followers. We're recruiting the ones who disrupt, provoke, and refuse to fail. Step 10 is ancient history. We're already at step 30 — and moving faster than anyone else dares.

Original Posting:

April 24, 2026

For U.S. Positions: While subject to change based on business needs, Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date of no earlier than 3 days after the original posting date as listed above.

Pay Range:

Pay Range $59,150.00 - $106,925.00

The Leidos pay range for this job level is a general guideline only and not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law.

About Leidos

Leidos is an industry and technology leader serving government and commercial customers with smarter, more efficient digital and mission innovations. Headquartered in Reston, Virginia, with 47,000 global employees, Leidos reported annual revenues of approximately $16.7 billion for the fiscal year ended January 3, 2025. For more information, visit www.Leidos.com.

Pay and Benefits

Pay and benefits are fundamental to any career decision. That's why we craft compensation packages that reflect the importance of the work we do for our customers. Employment benefits include competitive compensation, Health and Wellness programs, Income Protection, Paid Leave and Retirement. More details are available at www.leidos.com/careers/pay-benefits.

Securing Your Data

Beware of fake employment opportunities using Leidos’ name. Leidos will never ask you to provide payment-related information during any part of the employment application process (i.e., ask you for money), nor will Leidos ever advance money as part of the hiring process (i.e., send you a check or money order before doing any work). Further, Leidos will only communicate with you through emails that are generated by the Leidos.com automated system – never from free commercial services (e.g., Gmail, Yahoo, Hotmail) or via WhatsApp, Telegram, etc. If you received an email purporting to be from Leidos that asks for payment-related information or any other personal information (e.g., about you or your previous employer), and you are concerned about its legitimacy, please make us aware immediately by emailing us at [email protected].

If you believe you are the victim of a scam, contact your local law enforcement and report the incident to the U.S. Federal Trade Commission.

Commitment to Non-Discrimination

All qualified applicants will receive consideration for employment without regard to sex, race, ethnicity, age, national origin, citizenship, religion, physical or mental disability, medical condition, genetic information, pregnancy, family structure, marital status, ancestry, domestic partner status, sexual orientation, gender identity or expression, veteran or military status, or any other basis prohibited by law. Leidos will also consider for employment qualified applicants with criminal histories consistent with relevant laws.

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Refine Your Search

system engineer jobs in belleville, il

Enterprise Voice Engineer II

Manufacturing Systems Engineer

Systems Engineer - Mid-Level

Research & Development Engineer

Network/SATCOM Engineer

Cloud Operations System Administrator

Infrastructure Specialist

Service Desk - SME

Network Engineer III

Implementations Network Engineer

IT Systems Engineer

Systems Administrator

Cloud Systems Engineer

Implementations/Activations Network Engineer

RHEL/Windows System Administrator - Fulltime/Permanent

Implementations Network Engineer III

Systems Engineer 2-3 (Associate/Mid-Level)

Implementations/Activations Network Engineer II

Project Manager - Power Systems Engineer

Patent Attorney / Patent Agent / Engineering Physics / Fully Remote MO 63104 4115

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