56 cybersecurity engineer jobs at 30 companies in O'Fallon, IL
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Cybersecurity Engineer
St. Louis, Missouri, United States
$80k-$115k/yr HybridFull Time
Bachelor's in IT/Computer Engineering/Cybersecurity required (Master's preferred); demonstrated experience securing enterprise environments, Windows administration, incident response, vulnerability management, and strong communication skills.
Microsoft 365, Azure/Entra, AWS, Okta, PKI, Windows, NIST CSF, CIS Controls, SOC 2
1w
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SR CYBERSECURITY ENGINEER
Smyrna or St. Louis
OnsiteFull Time
Senior-level cybersecurity engineering experience supporting enterprise IT and OT security, SIEM/EDR/identity platforms, incident response, vulnerability assessment, and security architecture.
SIEM, MDR, XDR, Endpoint Detection & Response (EDR), MFA, PIM, PAM, Azure, Microsoft 365, SOC, ICS, SCADA
1w
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SR CYBERSECURITY ENGINEER
Smyrna or St. Louis
OnsiteFull Time
Bachelor's degree or equivalent experience; senior-level cybersecurity engineering with hands-on SIEM/EDR/identity/cloud and OT support; incident response, threat detection, and security architecture experience.
SIEM, MDR, XDR, EDR, MFA, PIM, PAM, Azure, Microsoft 365, ICS/SCADA
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Cybersecurity Forward Deployed Engineer - FDE - Consultant
Atlanta or Milwaukee or Herndon or Dallas or Columbus or Kirkland or Irvine or Cincinnati or New York or Cleveland or Oklahoma City or Austin or Albany or Chicago or Arlington or St. Petersburg or Hartford or Pittsburgh or St. Louis or Miami or Sacramento or Raleigh or Minneapolis or Scottsdale or Mountain View or Morristown or San Francisco or Denver or Boston or Philadelphia or Des Moines or Overland Park or Los Angeles or Charlotte or Walnut Creek or Carmel or Seattle or Houston or Redmond or Bentonville or Beaverton or Nashville or Detroit or San Diego
$54k-$235k/yr FieldFull Time
3+ YOE3+ years engineering experience in cybersecurity, 1+ year deploying agentic AI in production, 3+ years cloud security experience (AWS/Azure/GCP), bachelor\u0002s degree or equivalent.
Claude Code, Cursor, GitHub Copilot, AWS, Azure, GCP, OWASP LLM Top 10, NIST AI RMF
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Senior Engineer I, Cybersecurity Advanced Consulting and Engineering Solutions
Buffalo or St. Louis
$102k-$152k/yr HybridFull Time
5+ YOEBS in engineering or related field, 5+ years in industrial controls/automation/embedded software, 2–3 years in Secure Development Lifecycle domains, PLC programming (FBD, ST, LD), Git/GitHub, C/C++, Python, experience with Modbus/BACnet/SNMP/Redfish, strong troubleshooting and communication.
Git, GitHub, C, C++, Python, C.suite/1Tool (Carel), Modicon, Schneider EcoStruxure, Modbus, BACnet, SNMP, Redfish, PLC
3mo
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Visual Cybersecurity Engineer, Senior (Hazelwood, MO, US, 63042)
Hazelwood, Missouri, United States
OnsiteFull Time
8+ YOE8+ years experience; CompTIA Security+ 701; willing to travel occasionally; DoD/ITAR familiarity; BS in cybersecurity/computer science or related field.
Windows, Unix/Linux, Powershell, Python, Perl, Bash, RMF, Network+
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Cybersecurity Solutions Engineer - Threat Vulnerability Engineering
Arizona or Tempe or Missouri or St. Louis or United States
HybridFull Time
7+ YOEApproximately 7 years security/platform engineering experience; Bachelor's in related field or equivalent; hands-on experience with SOAR, SIEM, EDR, DAM, NDR, cloud (AWS/Azure/GCP), IaC, CI/CD, and scripting (Python, PowerShell, Bash).
SOAR, SIEM, EDR, DAM, NDR, vulnerability tools, AWS, Azure, GCP, Infrastructure as Code (IaC), CI/CD, APIs, Python, PowerShell, Bash
3mo
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Advanced Cybersecurity Analytics Engineer III
St. Louis, Missouri, United States
$75k-$158k/yr OnsiteFull Time
8+ YOEUS citizen with active TS/SCI, 8+ years cyber analytics experience, DoD 8140/8570 IAT Level III and CSSP Analyst compliant certification, SIEM/data mining and signature development experience, network/protocol analysis, regex; scripting and cloud familiarity desired.
SIEM, Python, Bash, PowerShell, protocol analyzer, hex editor, regular expressions
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Advanced Cybersecurity Analytics Engineer III
St. Louis, Missouri, United States
$75k-$158k/yr OnsiteFull Time
8+ YOEUS citizen with TS/SCI; 8+ years advanced cyber security analytics; DoD 8140.01/DoD 8570.01-M IAT Level III and CSSP Analyst; experience with data mining/queries in a SIEM; signature development and tuning; network protocol analysis; regex proficiency.
SIEM, Python, Bash, PowerShell, Regex
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Product Security Engineer (Air Dominance-Phantom Works)
Berkeley, Missouri, United States
$162k-$220k/yr OnsiteFull Time
1+ YOEBachelor's in engineering or related field,1+ years avionics development experience,ability to obtain U.S. Secret clearance,knowledge of product cybersecurity (JSIG,RMF,NISPOM),risk analysis and supplier management,travel up to 25%.
MBSE
2d
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Product Security Engineer (Air Dominance-Phantom Works)
Berkeley, Missouri, United States
$162k-$220k/yr OnsiteFull Time
1+ YOEBachelor's degree in a related technical field, 1+ year developing, integrating, and verifying aircraft avionics systems, cybersecurity incident response knowledge, and ability to obtain a U.S. Secret clearance.
MBSE, Risk Engineering, encryption
1w
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Product Security Engineer (Air Dominance-Phantom Works)
Berkeley, Missouri, United States
$162k-$220k/yr OnsiteFull Time
1+ YOEBachelor's degree,1+ years in avionics or embedded systems development,ability to obtain U.S. Secret clearance,knowledge of product cybersecurity,JSIG/DoD/ICD 503/RMF/NISPOM controls,experience with suppliers and system architectures.
MBSE
2mo
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Security Engineer
St. Louis or Kansas City or Israel
$80k-$150k/yr HybridFull Time
2+ YOE2+ years cybersecurity/SOC experience, hands-on AWS knowledge, AWS entry-level certification (e.g., Cloud Practitioner), Python proficiency, SIEM and log-pipeline experience, and detection engineering skills.
AWS, Python, SIEM, Sigma, SPL, KQL, SQL, YARA, Terraform, CloudFormation, CDK, LLMs
6d
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Security Engineer- Enterprise Platforms
Mt Sterling or Chesterfield
$87k-$131k/yr OnsiteFull Time
Bachelor's degree or equivalent experience in related field; experience in cybersecurity, infrastructure, or network engineering; knowledge of enterprise security platforms; strong troubleshooting, communication, and analytical skills.
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Data Loss Prevention Engineer
Scott Air Force Base, Illinois, United States
$99k-$225k/yr HybridFull Time
Experienced Forcepoint/DLP engineer with cybersecurity engineering/admin background, endpoint DLP deployment/configuration experience (Forcepoint, Trellix, Microsoft, Symantec), DoD compliance knowledge, network/security protocol knowledge, Secret clearance, HS diploma or GED.
Forcepoint, Forcepoint Web, Forcepoint Email, Forcepoint CASB, Data Loss Prevention (DLP), Trellix, Microsoft, Symantec, Splunk, McAfee, Palo Alto, SIEM, SOAR
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Sales Engineer - Mid-West US (Minnesota)
Minnesota or Wisconsin or St. Louis
RemoteFull Time
3+ YOE3+ years in sales/solutions engineering for cybersecurity; strong security operations knowledge; hands-on with APIs, JSON, YAML, jq; experience with SIEM, SOAR, EDR, IAM, cloud services; demo and POC execution skills.
APIs, JSON, YAML, jq, SIEM, SOAR, EDR, IAM, GRC, AWS, Azure, GCP, Blink UI
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Information System Security Engineer
Scott Air Force Base, Illinois, United States
OnsiteFull Time
3+ YOEActive Secret clearance, 3+ years cybersecurity engineering experience, hands-on STIG/SCAP/Tenable experience, CEH and DoD 8140.03M DCWF Basic Tier certification required, strong documentation and communication skills.
STIG Viewer, SCAP Compliance Checker, Tenable Security Center, Tenable Cloud Security, CyberArk Privileged Access Management (PAM)
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Inside Sales Engineer
Frisco or St. Louis or Atlanta or Oklahoma City
HybridFull Time
1+ YOE1 year pre/post-sales experience with a bachelor's in a related field or 3 years' related experience. Proficiency in cybersecurity and networking fundamentals, critical thinking, and strong presentation and communication skills.
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Security Engineer II - CSIR
Saint Louis, Missouri, United States
OnsiteFull Time
2+ YOEBachelor's in CS/IS/cybersecurity or equivalent experience, 2+ years in IT/security, incident identification and response, troubleshooting, familiarity with security tooling and SIEM/UEBA, strong communication and multitasking.
Microsoft 365, Microsoft Excel, Microsoft Outlook, SIEM/UEBA, firewalls, intrusion detection systems, endpoint detect response, anti-virus, anti-malware, authentication systems, ticketing systems, monitoring tools
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IA Engineer - Senior
Scott Air Force Base, Illinois, United States
OnsiteFull Time
8+ YOEActive Secret clearance, Bachelor\u0002s degree in a technical field, minimum 8 years supporting DoD cybersecurity/RMF, experience with eMASS, STIGs, vulnerability management and incident response.
eMASS, ACAS, Nessus, SCAP, Fortify, HBSS, SolarWinds SEM, McAfee NSM, IDS sensors, Splunk, LogRhythm
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