Top Cyber Security Jobs in St. Louis, MO

Assesses and mitigates security risks across AI, machine learning, and Generative AI systems. Responsibilities include threat modeling, vulnerability assessment, security monitoring, incident response, governance, compliance, access controls, policy development, audit support, and advising engineering and business teams on secure AI development and responsible adoption.

Twelve-week summer internship supporting application, API, and AI security testing. Responsibilities include documenting findings, researching security technologies, improving metrics and dashboards, assisting with automation, preparing technical reports, and collaborating with security and technology teams. The role is open to students pursuing cybersecurity, information technology, computer science, or related degrees who graduate in December 2027 or later.

Supports sales teams and partners in technical sales activities for cloud security products. Responsibilities include understanding customer requirements, integrating solutions, delivering technical presentations and demonstrations, managing product evaluations, responding to RFPs and RFIs, supporting partner development, discussing cloud architectures, resolving technical obstacles, and training sales and partner teams on product and business value.

The role involves leading security initiatives, building security tools, conducting vulnerability assessments, and collaborating with teams to enhance cloud security and risk management.

Lead research to detect Windows threats and develop sensor/telemetry capabilities. Collaborate with engineering and product teams to implement detections, investigate false positives/negatives, apply AI to research workflows, produce technical documentation, and mentor others while promoting the company externally.

Leads cloud security architecture and implementation, focusing on data privacy, GDPR compliance, Kubernetes security, mTLS, RBAC, zero-trust networking, audit logging, threat modeling, and vulnerability assessments. Collaborates across teams, mentors junior engineers, documents security practices, monitors industry trends, and drives resilient, compliant cloud infrastructure.

Build Ent’s endpoint data-protection layer for classifying sensitive data, tracing provenance, and enforcing egress policies across devices, applications, networks, removable media, browsers, and AI tools. Develop cross-platform interception and content inspection capabilities, integrate on-device language models, optimize performance, produce forensic evidence, investigate compatibility issues, and improve detection precision for enterprise customers.

Deliver cybersecurity assessments, architecture reviews, maturity evaluations, security roadmaps, and implementation guidance for enterprise clients. Assess on-premises, cloud, hybrid, identity, OT, and ICS environments; identify risks and security gaps; produce reports; and present recommendations to technical and executive stakeholders. Support incident response and post-incident improvements, collaborate with engagement managers and specialists, contribute to consulting methodologies, and stay current on threats and security best practices. Travel is approximately 20%.

Administer Tenable Security Center, Nessus Scanners, and Nessus Manager on Linux platforms. Conduct vulnerability scans, analyze and prioritize findings, coordinate remediation, produce reports, monitor alerts, respond to incidents, maintain secure platform performance, install security products, and train users. The role supports enterprise cybersecurity environments and requires extensive cyber experience, current TS/SCI clearance, DoD certification, and the ability to pass a government polygraph.

Lead architecture and scaling of an automated, AI-driven vulnerability detection and remediation platform across cloud, containers, and applications. Correlate SAST/DAST/SCA findings, implement AI-assisted triage, run red/purple team validation, and build automated remediation pipelines integrated into CI/CD for continuous compliance and risk reduction.

Develops and maintains defensive cyber countermeasures across enterprise networks. Analyzes security data, trends, incidents, and intelligence to identify threats, tune SIEM rules and signatures, investigate potential compromises, and support incident response. Collaborates with defensive operations, cyber analytics, and incident response teams; validates countermeasures through Purple Team exercises; documents analysis and presents findings in briefings.

Designs, implements, and maintains enterprise IAM solutions across hybrid on-premises and cloud environments. The role drives Zero Trust modernization, identity automation, access governance, privileged access controls, threat monitoring, and automated response. Responsibilities include evaluating security technologies, mitigating identity risks, supporting compliance and audit readiness, and establishing security standards. The engineer collaborates with infrastructure, application, and security teams and participates in rotational on-call, weekend, and holiday support.

Own and evolve the application security program: embed secure SDLC practices, partner with engineering on design and code reviews, manage AppSec tooling (SAST/DAST/ASM/WAF/mobile), harden AWS deployments, integrate security into CI/CD, and lead vulnerability investigation and remediation efforts.

Design and build cloud security tooling, automation, and AI-enabled threat-hunting capabilities. Perform threat modeling, incident response, security research, architecture reviews, and detection engineering. Develop SIEM and SOAR integrations, automate security processes, address AI-related threats using MITRE ATLAS, and contribute to multi-year security roadmaps. Collaborate across engineering and business teams, prioritize security improvements, support on-call operations, and mentor team members.

Own strategic post-sales relationships with enterprise customers, advising them on AI security and governance. Lead discovery, define measurable outcomes, drive adoption, support retention and expansion, and coordinate Product, Engineering, Security, Support, and operationalization teams. Translate CISO-level strategy, GRC concerns, business objectives, and technical requirements into practical solution strategies while identifying new AI security use cases and growth opportunities.

Lead AWS GovCloud security engineering and accreditation for pre-production modernization environments. Design secure cloud architectures, landing zones, IAM controls, network segmentation, infrastructure automation, containers, and CI/CD deployments. Own DoD RMF, IATT-C, and ATO packages, security controls, POA&Ms, vulnerability remediation, continuous monitoring, and cybersecurity assessments. Provide cloud and cybersecurity guidance for modernization, migration, data transition, Zero Trust, and ICAM initiatives while advising program leadership.

Supports information security governance programs covering data retention and protection, eDiscovery, legal holds, insider risk, investigations, and regulatory compliance. Develops policies and governance processes, assesses risks and control gaps, administers retention and destruction activities, supports litigation and audit requests, investigates insider risk events, manages related technologies and vendors, and delivers reports and executive communications. Partners with Legal, Compliance, HR, Corporate Security, Technology, and business stakeholders.

Secure Temporal’s development pipeline, product, and customer execution environments. Partner with engineering teams on secure architecture, threat modeling, risk assessments, code and software supply-chain security, vulnerability triage, Kubernetes hardening, multi-tenant isolation, and responsible AI security. Participate in on-call rotations and help establish actionable security policies and practices across the organization.

Build automation and data tooling for Sales Engineering, support customer Proofs of Value, integrate and validate security data, and analyze vulnerabilities, controls, and attack paths. Own threat intelligence for go-to-market teams by tracking CVEs and active exploitation. Present findings to customers, support technical sales conversations, and collaborate with Product, R&D, and Research to improve detection and mitigation logic.

Leads cybersecurity solutions engineering for government and education customers across managed security, network monitoring, cloud security, and related services. Provides technical discovery, solution design, demonstrations, proofs of concept, onboarding, deployment guidance, escalations, and post-sales support. Partners with sales and technical account teams, mentors engineers, develops enablement materials, informs product strategy, identifies expansion opportunities, and manages customer activity in Salesforce.

Leads Trace3’s Security Solutions practice, developing go-to-market strategy, security offerings, AI-enabled services, presales execution, partner relationships, and complex client engagements. Owns revenue, gross profit, forecasting, pipeline, and operating-plan performance. Advises executive leadership, supports assessments and proof-of-concepts, communicates with technical and executive audiences, and leads, coaches, and develops practice teams.

Build Tempo’s product security program from the ground up, including application, infrastructure, endpoint, and supply-chain security tooling. Identify and remediate production and development-pipeline risks, lead incident response through post-mortems, conduct secure design reviews, and establish scalable security practices. The role requires hands-on coding, deep incident-response expertise, strong infrastructure and application-security knowledge, and autonomous collaboration with engineering.

Own Fetch’s information security function, including vulnerability management, application security, incident response, forensics, security architecture, GRC, compliance, third-party risk, AI governance, and security awareness. Serve as incident commander and senior technical authority, mature the security program, lead audits and executive reporting, manage security risks, and hire and develop the Security Engineering team.

Designs and executes application security practices across product and platform engineering teams. Responsibilities include integrating SAST, DAST, SCA, secret, IaC, API, mobile, container, and cloud-native security into CI/CD; conducting secure design reviews, threat modeling, code reviews, and testing; building automation, guardrails, policy-as-code, release risk gates, secure coding standards, SBOM processes, and vulnerability disclosure workflows.

Designs, deploys, and optimizes enterprise data protection across Microsoft 365, endpoints, cloud applications, SaaS platforms, and network egress points. Manages DLP, data classification, Microsoft Defender, Sentinel, Varonis, and DSPM capabilities; investigates incidents, reduces false positives, assesses data exposure, and drives remediation. Develops data handling standards, automation, documentation, reporting, and security metrics while partnering with IT, Legal, Compliance, and business data owners.