Top Senior Security Engineer Jobs

Lead cybersecurity engineering for US Naval warfare systems: author A&A artifacts, apply RMF and DISA STIGs, design/detect/correct defenses, plan and execute security testing, shepherd ATO/IATO processes, and serve as Information Assurance Officer and technical lead for risk assessments and vulnerability management.

Design and build security and infrastructure systems for an AI data platform: detect and respond to security events, automate security workflows, harden cloud and production environments, enforce access control, integrate security into development workflows, own incident handling, secure data and model interaction layers, and contribute to human-in-the-loop systems and core internal tooling.

Senior cyber security engineer responsible for RMF/A&A activities for SLBM and naval warfare systems: author A&A artifacts, document systems, apply DISA STIGs/NSA guidance, lead security test and vulnerability analysis, produce SSAOM, manage IAVM and obtain ATO/IATO, and perform risk assessments and technical security design.

Design, implement, and automate cloud security controls (primarily AWS, with GCP work) using code (Python, Go) and IaC (Terraform). Build authorization and JIT access systems, harden containers and CI/CD pipelines, integrate data classification with access controls, automate security operations and incident response, and partner with engineering to embed HIPAA-compliant, secure-by-design practices.

Lead design and implementation of cloud security controls across AWS/GCP, Kubernetes, and serverless environments. Harden infrastructure, automate IAM and secrets management, integrate security scanning into CI/CD, operationalize vulnerability management and threat modeling, and partner with engineering to embed DevSecOps practices across AI-driven workflows.

Define and own vehicle system security requirements and architectures. Collaborate with OEMs and systems engineers to implement network/module security. Create security requirements for software interfaces, develop and execute V&V plans, run tests, analyze results, resolve defects, and manage delivery timing of security features and software updates across vehicle prototypes.

Serve as the cybersecurity SME for the generation fleet: lead segmented architecture deployments and vulnerability remediation, develop fleet-wide standards, oversee compliance audits, lead incident root-cause analysis, build dashboards/metrics, and represent cybersecurity on capital projects and plant upgrades.

Lead Datadog-first security observability and detection engineering: design, scale and tune Datadog Cloud SIEM, log pipelines, detection rules and telemetry. Correlate signals across EDR, cloud and identity, automate detection-as-code, reduce false positives, and build dashboards, monitors and workflows in partnership with Security Ops, SRE and Engineering.

Own product security across the SDLC: threat modeling, secure design reviews, application security testing (code review, SAST/DAST), supply-chain/dependency hardening, CI/CD security, and building automated security tooling and guardrails while partnering with engineering and product.

Perform application security analysis using automated and manual techniques (SAST, SCA, fuzzing, code reviews), integrate and tune security tooling in CI/CD pipelines, support developers with remediation, conduct threat modeling and secure design reviews, document findings, and embed security into the development lifecycle for mission-critical defense software.

Administer, integrate, automate, and optimize enterprise security tools. Develop APIs, scripts, and automation for tool interoperability. Design vulnerability scanning strategies and SIEM data models. Build dashboards and alerts for SOC/CDM stakeholders, aggregate logs and asset data, support audit readiness, and use CI/CD, containers, and cloud-native automation to improve security engineering workflows.

Lead assessments, design secure infrastructure and controls, implement scalable security solutions, operate and administer enterprise security tools, drive vulnerability management, incident response, and risk analysis, and report security posture to stakeholders and senior leadership.

Design, implement, and support network security and firewall solutions. Lead security architecture, policy optimization (Firemon), change monitoring, and incident/level 2-3 operational support. Deliver consulting, on-site implementations, and 24x7 response for P1/P2 incidents.

Designs and maintains enterprise security architecture aligned with NIST RMF and DoD STIGs. Performs security engineering across the SDLC, vulnerability management with Nessus/ACAS/Qualys, incident response and threat detection using Splunk, endpoint protection and PAM (CyberArk), automation with PowerShell/Python/Bash/Ansible, cloud and container security (AWS/Azure/Kubernetes), documentation, training, and technical leadership for accreditation and continuous monitoring.

Lead threat modeling, secure design reviews, penetration testing and deep code review for Unity products. Build and operate security automation and AI-assisted tooling, secure AI/LLM integrations and agentic systems, drive remediation with engineering teams, investigate AppSec incidents, and contribute to the secure development lifecycle and compliance.

Lead triage and resolution of hardware, firmware, and software vulnerabilities across semiconductor products; perform technical assessments (CVSS), coordinate remediations and disclosures, author advisories, run SBOM/VEX analysis, and support regulatory and standards readiness (CRA, IEC 62443, ISO/SAE 21434) across engineering and compliance teams.

Design, implement, and operate security platforms (firewalls, IDS/IPS, SIEM, MDM). Perform vulnerability assessments, monitor and analyze security logs, drive remediation, enforce security policies, and evaluate new security technologies.

Lead security strategy, operations, and GRC across corporate and customer-facing transit systems. Drive security architecture, incident response (incident commander), threat intelligence, tabletop exercises, vendor risk management, and compliance across PCI DSS, SOC 2, and ISO 27001. Serve as primary auditor contact and communicate risk to leadership.

Design, architect, and implement cloud security solutions on AWS; set cloud security strategy and governance; act as SME for security tools; integrate and maintain security tooling, KPIs, and operational processes; collaborate with infrastructure teams to deploy and support security controls.

Lead security architecture design, implement and troubleshoot firewall and network security solutions, operate FireMon policy optimization, provide Level 2-3 support, handle work orders/change requests/incidents, and deliver on-site/remote consulting and 24x7 response for critical incidents.

Lead application security initiatives across the SDLC: perform threat modeling, secure design reviews, remediation guidance, third-party pen test management, develop security tooling, advise leadership on risks, mentor teammates, and improve application security maturity and training.

Provide cybersecurity engineering and architecture for mission and enterprise systems, translate NIST/CNSS controls into secure designs, troubleshoot Linux/Windows servers and endpoints, Cisco network devices, and enterprise storage, implement continuous monitoring (vulnerability scanning, SIEM), perform technical security assessments using Tenable and DISA STIGs, prioritize risk, and lead remediation efforts to maintain compliance and mission assurance.

Design and consult on network security architecture, lead security implementations, provide L2-L3 operational support, handle work orders/change requests/incidents, perform on-site deployments, and respond 24x7 to P1/P2 incidents.

Lead network security architecture and firewall projects, implement and operationalize FireMon policy optimization, provide L2-L3 support and 24x7 response for priority incidents, handle work orders, change requests, and customer-facing consulting engagements.

Designs, deploys, and manages information security systems (firewalls, IPS/IDS, SIEM, WAF, IAM). Performs vulnerability scanning, incident response, audits, protocol analysis, and security consulting. Develops BCP/DR plans, researches new technologies, and collaborates with legal, HR, and law enforcement on investigations.