Top Senior Security Engineer Jobs

Lead cloud and SaaS security across AWS and core platforms. Configure and operate CSPM/CNAPP tooling, build detections in SIEM/EDR, drive remediation with platform teams, secure containers and workloads, lead cloud incident response, and implement policy-as-code guardrails for secure deployments and MLOps pipelines.

Lead end-to-end design, analysis, test, procurement, and operations of spacecraft RF and optical communications systems. Provide technical leadership and mentorship, perform link budgets and EM/antenna simulations, define architecture and requirements, execute RF test campaigns, manage suppliers, coordinate interfaces with ground/relay systems, and support integration, launch, and early operations.

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.

Design and analyze ground support equipment, tooling, fixtures, and custom machines for space vehicle integration and test. Perform structural analysis (FEM and hand calculations), create CAD models and drawings (apply GD&T and ASME Y14.5), support vendor selection, fabrication, installation, testing, and project scheduling/budget inputs.

Own and harden corporate security for endpoints, identity, and SaaS. Implement Zero Trust and device-trust patterns, build automation and tooling, run detection/response for enterprise systems, and serve as the internal security SME for corporate workflows.

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.

Lead and execute product security testing (DAST, SCA, API, pen tests), analyze exploitability, verify fixes, produce security assessment reports, contribute to secure SDLC, threat modeling, tool evaluation, customer/partner security responses, and maintain lab deployments for testing.

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.

Define architecture and lead development of an AWS-hosted, secure web portal. Write high-performance secure code, lead DevSecOps and database integrations, conduct code reviews and query optimization, ensure DHS/CBP security compliance, mentor developers, and translate product requirements into technical designs.

Senior Systems Engineer responsible for managing and securing AWS infrastructure, implementing security monitoring and controls, automating infrastructure with Terraform/PowerShell, maintaining hardening and patching standards, troubleshooting hybrid environments, and supporting backup, DR, and high-availability configurations while collaborating with teams and maintaining documentation.

Design, implement, and maintain cloud security controls and Policy/IaC (Terraform) for Azure/AWS. Use CSPM tooling (Wiz, Defender), perform security assessments, incident response, and collaborate with security champions to enforce compliance (CIS, NIST 800-53).

Lead cybersecurity efforts: analyze systems, define security requirements, perform network design reviews and security testing, advise on hardware/software security, and coordinate with development teams to ensure IA standards and vulnerability testing are implemented.

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.

Hands-on cloud security engineer responsible for vulnerability discovery, triage, and remediation across AWS, Azure, and GCP. Operate and tune security tooling (CSPM, scanners, WAF), perform security architecture reviews, support Secure SDLC, automate validation and tracking, and collaborate with platform and application teams to improve vulnerability and patch management outcomes.

Hands-on cloud security engineer responsible for reviewing cloud and application designs, operating and tuning security tooling, triaging and driving remediation of cloud security findings, automating controls, supporting vulnerability management and certificate lifecycle, and collaborating with engineering and platform teams to improve cloud security posture across AWS, Azure, and GCP.

Build full-stack features for Google Drive and OAuth surfaces, design and ship LLM-powered agentic workflows for detection, investigation, and remediation, integrate with Google Workspace APIs at scale, partner with product and design, collaborate across teams, and contribute through mentorship, code review, and ownership from design to production.

Lead design and implementation of IAM, zero-trust, and anti-tamper controls for a portable C2 system. Deploy logging/monitoring (Splunk, Syslog), manage MDM and device lifecycle, coordinate encryption/TACLANE and SD-WAN protections, and enable secure rapid software integration while ensuring continuous monitoring and compliance in classified DoD environments.

Assess cloud designs and mobile features for security issues; evaluate builds for security best practices; design secure cloud services and automated security test frameworks; triage vulnerabilities; use SAST/DAST and AI tools; ensure regulatory compliance; engage third-party pentesting, red team, and threat modeling.

Secure and harden cloud infrastructure, identity systems, and internal AI/agentic tooling. Build security automation, detection pipelines, and IaC controls (Terraform). Investigate incidents, query logs (Athena, CloudTrail Lake), design IAM policies, support secure customer deployments, research cloud/AI security threats, and produce runbooks and playbooks to scale security practices.

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.

Build and operate Coupang's security infrastructure and IAM platforms. Design and implement backend APIs and scalable distributed systems, collaborate cross-team for platform adoption, ensure reliability and operational excellence, and mentor other engineers.

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, build, and maintain enterprise security tooling and AI safety guardrails. Secure identity systems, endpoints, and telemetry; automate GRC evidence gathering; support vulnerability management; defend against advanced threats and collaborate cross-functionally to maintain enterprise security posture.