Top Senior Cyber Security Jobs in St. Louis, MO

Lead and manage information system security for classified programs: oversee RMF implementation and continuous monitoring, manage and coach security teams, coordinate with assessors and stakeholders, perform assessments and audits, prepare technical reports and briefings, prioritize and remediate risks, and develop enterprise-wide security policies and procedures.

Lead design, implementation, and continuous improvement of ECS University training programs. Build onboarding and refresher curricula across ECS disciplines, create specialized tracks for cyber, industrial security, and management, integrate Degreed and TDMS for tracking, ensure DFARS compliance, collaborate with SMEs, and lead a dedicated training team.

Responsible for ensuring security and integrity in technology operations, providing expertise in security engineering, and collaborating with teams to embed security measures in API design and deployment.

Perform COMSEC custodian duties including inventory, distribution, destruction, and accountability of keying material and secure equipment. Install and deliver STE/encryption devices, maintain records, courier classified material, enforce USG COMSEC standards, train personnel, ensure AIS security compliance, and perform physical work in production/confined environments.

Lead planning, deployment, tuning, and operational support of CrowdStrike Falcon's AI/ML detection and response capabilities. Implement and troubleshoot AI-driven detection models, automation playbooks, API integrations, and threat-hunting for customers. Provide training, mentorship, and customer-facing collateral while optimizing detection efficacy and integrating Falcon into customers' security workflows.

The Senior Security Engineer will assess application security for AI systems, focusing on prompt injection techniques, threat modeling, and client training on AI security topics.

Lead product security across the SDLC: threat modeling, secure architecture, vulnerability management, security testing and remediation, CI/CD/DevSecOps controls, AI security integration, bug bounty triage, developer training, and cross-functional security consulting to scale secure-by-design practices.

Lead product cybersecurity for embedded avionics across requirements, design, analysis, build, test, production, and sustainment. Define and implement security controls per RMF/JSIG/NISPOM, perform threat/adversity and risk assessments, develop secure architectures, coordinate cross-functional stakeholders, and drive risk reduction and technology maturation for Air Dominance programs.

Lead and mature Affirm's third-party security risk program by designing controls, automating GRC workflows, evaluating third-party/cloud security, building integrations and dashboards, and advising stakeholders. Drive automation using Python and agentic coding tools, operate orchestration across systems, manage a portfolio of risk reviews, and establish metrics, processes, and reporting to scale security risk management.

Lead and grow a Security Platform engineering team to design and operate centralized identity and access services (IdP integrations, SSO, authorization frameworks). Define roadmap, partner cross-functionally, and drive adoption of secure-by-default access controls across products.

The Physical Security Manager oversees the design and management of security systems, operations, and infrastructure while leading security initiatives and vendor management across corporate environments.

Lead and mature GitLab's security compliance program, expand certification portfolio (SOC 2, ISO, PCI, FedRAMP, etc.), drive automation and AI-enabled compliance workflows, manage auditors and cross-functional stakeholders, mentor a team, and improve metrics, reporting, and regulatory readiness to support business growth.

As a Sr. Product Security Engineer, you will focus on network security, identifying gaps, architecting solutions, and leading cross-functional security initiatives.

As a Software Engineer in Product Security, you will develop security tooling, build scalable systems, and collaborate with teams to safeguard the security cloud.

Lead operational support for privileged access management, implement AI security capabilities, and maintain security architecture. Collaborate to strengthen cybersecurity posture.

Lead and grow a team to drive maturity in Insider Risk, Data Protection/DLP, AI Security, and Federal Security. Own strategy, cross-functional programs, threat scenarios, and security investments while working with stakeholders to implement controls and scale capabilities.

Lead second-line IT risk oversight for technology, cyber, data and AI. Perform risk assessments, advise on controls and product launches, drive policy and remediation, support regulatory compliance, and report to executives and board on information security themes.

Lead customer trust and security governance: oversee contract reviews, security questionnaires, and escalations; partner with Legal, Sales, Product, and Procurement; develop templates, policies, playbooks, metrics, and awareness programs; and apply automation and AI to scale workflows and reporting.

The Sr. Infrastructure Security Engineer is responsible for protecting patient data, enhancing cloud infrastructure security, and collaborating with engineering teams to implement effective security practices.

The Security Engineer will manage Liftoff's SIEM, lead the adoption of AI-augmented SOC tools, triage alerts, and improve incident response processes while collaborating on various security functions.

Lead assessment and mitigation of security risks in the virtualization stack. Build threat models, rubrics, and defenses; partner with kernel, virtualization, and provisioning teams to design and implement mitigations; mentor engineers, manage vulnerability backlog, and promote security best practices across product teams.

Run day-to-day marketing for AppSec, AI/ML Security, and Research & Engineering practices: produce technical content, own social and event presence, run demand-generation campaigns, enable sales, build analytics and attribution, and coordinate cross-practice coverage with engineering and GTM teams.

Lead and grow a security engineering team to design and operate cloud-native security controls, drive DevSecOps practices, conduct threat modeling and incident response, partner cross-functionally on security roadmaps, and ensure compliance with frameworks (NIST, SOC 2, ISO, etc.). Responsible for vulnerability management, identity and access controls, observability/SIEM, and security automation.

Lead product security work across Vercel: threat modeling, secure code reviews, open-source and supply-chain security, SDLC tooling and automation, bug bounty triage, cross-team security projects, and customer-facing security support to embed security across development and platform operations.

Design, implement, and maintain scalable cloud security controls for Vercel's platform. Harden infrastructure using infrastructure-as-code and policy enforcement, secure CI/CD pipelines, perform threat modeling and risk analysis, improve monitoring and incident response, and build platform-level security tooling in collaboration with platform and infrastructure teams.