Top Senior Cyber Security Jobs in St. Louis, MO

Leads cybersecurity operations for classified information systems, enforcing security policies and Risk Management Framework requirements. Provides technical leadership, mentorship, compliance oversight, cloud migration guidance, security architecture support, threat analysis, reporting, and corrective-action recommendations. The role interfaces with government customers and cross-functional teams, develops security methodologies, evaluates and hardens software, and supports authorization and continued operation of systems processing classified information.

Leads product security engineering for defense training systems across requirements, architecture, assessment, testing, certification, and sustainment. Develops cybersecurity controls aligned with DoD RMF, JSIG, and NISPOM; conducts threat and risk assessments; identifies vulnerabilities; tracks mitigation; advises stakeholders; and supports cyber validation, audits, and certification. The role collaborates with engineering, customer, supplier, and industry partners while independently completing cybersecurity tasks.

Design and implement product security/anti-tamper software solutions for defense platforms. Define architectures, requirements, interfaces and algorithms, integrate and test security features across hardware and software, and collaborate with platform engineers and architects to field secure tactical capabilities.

Experienced Product Security Engineer supporting anti-tamper and product security for Boeing defense platforms. Responsibilities include developing requirements, documentation, test plans, and procedures; participating in verification; defining secure hardware and software architectures; and leading integration engineers across multiple programs. The role is fully onsite in Berkeley/St. Louis, Missouri, requires U.S. citizenship and the ability to obtain a Secret clearance, and involves collaboration with platform architects, chief engineers, customers, and suppliers.

Build Revel’s security program from the ground up, securing its product, infrastructure, cloud, on-premises, hardware-integrated environments, and software delivery pipelines. Responsibilities include threat modeling, security architecture, Infrastructure as Code, detection and incident response, vulnerability management, compliance with ITAR/NIST/CUI/CMMC requirements, customer security reviews, and security enablement. The role will establish foundational processes and may eventually lead a growing security team.

Leads product security and resiliency across the Tomahawk missile program lifecycle. Develops security requirements and architectures, protects systems and facilities, defines supplier security requirements, coordinates with government and industry stakeholders, researches innovative solutions, advises customers, investigates security issues, and supports compliance, certification, audits, and regulatory requirements.

Secure Zapier’s production infrastructure by identifying and mitigating risks, hardening cloud environments, improving Terraform and CI/CD security, managing vulnerability and misconfiguration tools, enforcing least-privilege access, strengthening data governance, hardening Kubernetes images, and supporting incident response. The role collaborates with Platform, Engineering, and Security teams in a remote-first environment.

Leads Apollo’s detection and response strategy, detection architecture, security observability, incident response, and AI-assisted security workflows. Builds MITRE ATT&CK-aligned detections, response automations, investigation tools, and detection-as-code pipelines using Panther and Python. Leads high-severity incidents across cloud, SaaS, and corporate systems; improves IR readiness, metrics, playbooks, and forensic processes. Partners with Engineering, Infrastructure, IT, Legal, Fraud, and leadership while mentoring engineers and driving multi-quarter security initiatives.

Lead cloud security strategy and hands-on execution across AWS environments. Own CNAPP and CSPM capabilities, improve IAM and container security, build infrastructure-as-code guardrails, conduct architecture reviews and threat modeling, support detection and incident response, and drive remediation programs. Establish a multi-year cloud security roadmap, influence engineering priorities, mentor teammates, and partner with platform, infrastructure, SOC, and product engineering teams.

Leads enterprise network security architecture, engineering, and modernization across cloud and on-premises environments. Designs firewalls, WAF, DDoS protection, Azure connectivity, microsegmentation, Zero Trust, SASE, and SD-WAN solutions. Serves as a Level 3 incident escalation point, drives root-cause analysis and resilience improvements, establishes automation and DevSecOps standards, and mentors engineers. Partners with stakeholders and vendors to deliver secure, scalable network security platforms.

Leads the Network Security Engineering and Operations team, overseeing enterprise network security infrastructure, availability, lifecycle management, monitoring, incident response, compliance, risk mitigation, and 24/7 escalation support. Manages engineers, vendors, budgets, strategic projects, and cross-functional initiatives while communicating cybersecurity risks to technical and executive audiences. Drives automation, resilience, continuous improvement, and preventative security practices across sites, datacenters, and cloud environments.

Manage a global 24/7 Security Operations Center, including analyst leadership, shift coverage, operational processes, quality assurance, training, and career development. Improve workflows, playbooks, and service-level performance while collaborating with Product, Support, Tactical Response, Threat Hunting, and Detection Engineering teams. Lead initiatives, track security operations objectives, operationalize new services, and communicate technical concepts to internal stakeholders and external audiences.

Designs, implements, and governs secure AWS, Azure, and GCP cloud architectures across IaaS, PaaS, and SaaS environments. Defines security standards, IAM strategies, network controls, and guardrails; leads cloud security reviews, threat modeling, and risk assessments; integrates security into DevOps and CI/CD workflows; evaluates security tooling; supports compliance; and mentors engineering teams. The role also drives cloud security posture improvements, documentation, remediation, and long-term security architecture maturity.

The Security Operations Engineer will build and manage cloud and enterprise security detections, lead incident response and threat hunting, automate security operations with SOAR playbooks, and maintain security telemetry pipelines. The role also involves vulnerability remediation, cloud architecture security reviews, cross-functional collaboration, on-call participation, and continuous improvement of runbooks and alert quality. Candidates need strong AWS security, SIEM, incident response, detection engineering, scripting, attacker tradecraft, and compliance framework experience.

The Senior Application Security Engineer will strengthen Apollo’s secure software development lifecycle through application security reviews, threat modeling, code analysis, vulnerability management, penetration testing, remediation, and AppSec tooling. The role includes developing automation, securing AI-powered features, improving security observability, enabling developers, and partnering across Engineering, Product, Platform, Data, Legal, and Security teams. This senior individual contributor will own long-term AppSec goals, resolve ambiguous risks, and drive cross-functional security improvements.

Own and define IAM strategy for corporate and production environments. Migrate Okta to Terraform, design least-privilege access, automate provisioning/deprovisioning and access reviews, build/manage MDM/MAM tooling, partner with platform and engineering teams, and serve as the IAM subject matter expert across Security, IT, and Engineering.

Own Cleo’s application and product security program across SaaS and customer-hosted products. Lead SSDLC practices, threat modeling, security tooling, vulnerability management, penetration testing, coordinated disclosure, CVE publication, and NIST CSF controls. Define product security standards, roadmap, secure defaults, access controls, and customer-facing advisories. Partner with engineering, product, architecture, and customers while guiding security engineers and consultants. Also establish protections for LLM applications, AI agents, and AI-assisted development workflows.

The Application Security Architect leads secure design and architecture reviews, threat modeling, source-code reviews, and security initiatives across application, cloud, infrastructure, and identity layers. The role develops security architectures and documentation, mentors security and engineering teams, supports AI-assisted product security workflows, and advances security awareness through the Security Champions program. Responsibilities include communicating risks to technical and executive audiences and embedding secure practices throughout software development and deployment.

Build and operate security infrastructure for MongoDB Atlas across AWS, Azure, and Google Cloud. Responsibilities include hardening Linux hosts and containers, implementing cloud security controls, workload identity, vulnerability management, Infrastructure-as-Code, runtime threat detection, and monitoring systems. The role leads initiatives from threat modeling and architecture through deployment and long-term production reliability.

Build and operate security infrastructure protecting MongoDB Atlas across AWS, Azure, and GCP. Responsibilities include hardening Linux hosts and containers, implementing Kubernetes security controls, managing CSPM and workload identity platforms, deploying security controls through Terraform and other IaC tools, and creating monitoring and alerting systems. The role leads initiatives from threat modeling and architecture through implementation, rollout, and ongoing production reliability.

Lead product security assessments and penetration testing across MongoDB products and cloud environments. Conduct threat modeling, code analysis, architecture reviews, vulnerability verification, and attack research. Use AI and automation to improve assessment workflows, collaborate with engineering teams on remediation and secure coding, and advise on container security and secrets management. Coordinate with red and detection teams while mentoring others and communicating findings to technical and non-technical stakeholders.

Build GitLab code security capabilities spanning dependency analysis, SBOM and lockfile parsing, vulnerability detection, AI-assisted analyzers, and automated dependency remediation. Design evaluation harnesses, package analyzers for CI and AI workflows, improve security report accuracy, and extend ecosystem coverage. Own initiatives from design through delivery, mentor engineers, collaborate across product and engineering teams, document systems, and participate in on-call support.

Lead Runpod’s security organization and own the security posture of its cloud platform, infrastructure, and corporate environments. Responsibilities include security strategy, cloud and application security, SecOps, GRC, compliance certifications, secure software development, threat modeling, vulnerability management, incident response, vendor risk, security automation, and infrastructure security. Build and mentor a distributed security team while partnering with Engineering, Infrastructure, Product, GTM, and Legal to protect customer AI workloads and support scalable growth.

Leads enterprise AI and application security architecture, governance, threat modeling, secure design reviews, and security tooling across cloud-native, AI, API, and microservices environments. Partners with engineering, DevOps, architecture, legal, compliance, and risk teams to implement secure-by-design practices, manage emerging AI threats, establish governance standards, and measure security maturity. Provides technical leadership, prototypes controls, evaluates third-party AI platforms, and mentors security and development teams.

Leads enterprise application security and secure SDLC initiatives, embedding vulnerability scanning, security gates, security-as-code, and AI security controls across CI/CD pipelines. Oversees vulnerability triage, remediation SLAs, threat modeling, secure code reviews, developer enablement, security metrics, toolchain automation, software supply chain security, and AI governance. Partners with engineering, architecture, delivery enablement, and risk teams to establish secure development standards and reduce application and AI-related security risks.