Top Senior Security Engineer Jobs

Lead design and implementation of security infrastructure for aviation ISR programs. Manage lifecycle of engineering and DevSecOps platforms (RHEL, GitLab/GitHub, Artifactory, 3DX, Cameo, Jama), enforce DISA STIG/NIST/ISO controls, troubleshoot integrations, mentor engineers, and support ATO/RMF and audits.

Lead design and implementation of security infrastructure and application/platform administration across RHEL/Linux environments. Administer GitLab/GitHub, JFrog Artifactory, 3DX/Cameo/Jama/Teamcenter tools, manage integrations, apply DISA STIGs, support ATO/RMF, perform troubleshooting, and mentor junior engineers while ensuring compliance, change management, and operational readiness in a classified defense program.

Lead design and implementation of security infrastructure and administer mission-critical engineering and DevOps applications. Manage Linux/RHEL systems, JFrog Artifactory, GitLab/GitHub, 3DX/Cameo/Jama/Teamcenter platforms, integrations, DISA STIG hardening, CI/CD integrations, and provide Tier 2/3 troubleshooting, compliance support, and ATO/RMF evidence for a classified defense program.

Lead design and implementation of secure database and enterprise storage architectures across relational, NoSQL, and cloud platforms. Manage performance, backup/recovery, HA, SAN/NAS, security hardening (DISA STIG/NIST), and ATO/RMF evidence. Serve as technical escalation, mentor junior staff, and support program architecture and acquisition decisions in a cleared defense environment.

Lead RMF-based authorization and cybersecurity engineering for weapon and PIT systems. Assess architectures, perform A&A tasks, recommend mitigation, develop security requirements and strategies, use scanning tools (Nessus/ACAS/SCAP/STIGs), support DevSecOps reviews, and implement program protection plans including CPI/CC and Tempest considerations.

Design, configure, deploy, monitor, and troubleshoot network security solutions. Lead NAC (Cisco ISE) and 802.1x implementations, migrate legacy platforms, provide assessments, capacity planning, documentation, and support multi-tier application integrations and threat remediation.

Lead cloud security engineering to implement and scale cloud-native security controls across AWS/Azure/GCP. Drive CSPM/CNAPP posture management (Wiz, native policies), policy-as-code, IaC automation, container/Kubernetes and API security, and AI-driven security capabilities. Partner with engineering, DevSecOps, IAM, governance, and audit teams to translate controls into repeatable patterns, improve remediation workflows, and support regulatory and risk objectives.

Lead design, deployment, configuration, and management of security solutions for Navy/DoD IT environments. Conduct vulnerability analysis, SCAP scans, STIG implementation, risk assessments, accreditation, audits, TEMPEST testing, malware scanning, incident troubleshooting, and provide cybersecurity guidance to IT teams.

Design and implement enterprise security architectures, lead AI/ML security (LLMs, GenAI, MLOps), develop security policies, conduct risk assessments, support incident response, mentor junior staff, and enhance cloud, network, IAM, data, and endpoint security.

Senior engineer responsible for hands-on design, development, and deployment of ServiceNow IRM and SecOps solutions. Build event-driven automation, engineer integrations with security tools (Splunk, Tenable, Qualys), implement CAM/RMF workflows, develop server- and client-side GlideScripting, enforce platform ACLs/data filtration, and validate work using Automated Test Framework across environments.

Lead hands-on engineering and deployment of ServiceNow IRM and SecOps solutions. Build event-driven automation, integrate external security tools (Splunk, Tenable, Qualys), implement RMF/CAM workflows, develop GlideScript/JavaScript logic, enforce platform ACLs, and validate work with ATF across environments.

Design, review, and build security systems for multi-tenant cloud and corporate environments. Develop internal security tooling (WAF, vulnerability management), harden production components, improve monitoring/patching, contribute to authentication/identity (SSO/SCIM), translate compliance controls, and participate in the security on-call rotation.

Design, evaluate, and secure complex network and SIGINT hardware systems. Conduct onsite assessments, lead hardware installations, model solutions, create test interfaces, perform MTBF/MTTR analyses, evaluate LAN/WAN and wired/wireless networks, research COTS/GOTS, produce security documentation, and deliver vulnerability assessments and actionable recommendations.

Design, build, and scale HSM-backed cryptographic and key-management services for large-scale cloud environments. Implement PKI, TLS, client-side encryption, TEEs, and Confidential VMs. Integrate identity (OAuth/SAML/Keycloak) and secure Google Workspace services. Ensure cryptographic lifecycle, compliance (FIPS), high availability, and support secure deployments across cloud APIs, OS, and hardware.

Define and decompose product security requirements, develop and run manual and automated security validation tests (functional and abuse tests) at vehicle, system, sub-system and ECU levels using SIL/HIL. Build test cases in multiple languages, document results for compliance (UN R155, ISO 21434), triage findings, collaborate with development teams to recommend and validate fixes, and align documentation with CSMS and GRC processes.

Lead and own the end-to-end cybersecurity program: achieve and maintain DoD ATO (RMF), embed security automation into CI/CD, run vulnerability scanning and remediation, harden microservices and containers, produce eMASS artifacts, and report risk and progress to leadership.

Lead and execute offensive cyber operations including red team engagements, network exploitation, malware analysis, and tool development. Produce client briefings, mentor junior operators, and improve operational tooling and efficiency.

Lead and execute offensive cyber operations including red team engagements, network exploitation, malware analysis, and tool development. Provide written and oral client briefings, mentor junior operators, and create scripts to improve operational efficiency.

Conduct offensive security assessments and red team operations to identify network and system vulnerabilities; perform malware and packet analysis; develop scripts and tools; deliver written and oral briefings to clients and management; and train and mentor junior operators.

Conduct offensive cyber operations, red team and penetration tests, network exploitation, malware analysis, and tool development. Analyze network/system weaknesses, brief clients and management, and train junior operators to improve operational tradecraft and efficiency.

Senior network/security engineer responsible for Palo Alto firewall and Panorama administration, proxy engineering, DLP and SCM integration, packet-level troubleshooting (tcpdump/Wireshark), SIEM log correlation (Splunk/ELK), Zero Trust network design, and ensuring IRS/NIST boundary protection compliance. Leads firewall normalization, Panorama 12.x integration with Strata Cloud Manager, and DLP plugin upgrades.

Lead design and delivery of enterprise network security and wireless solutions (Zero Trust, segmentation, firewalls, WLC/AP deployments). Manage end-to-end solution delivery, assess and remediate security weaknesses, align with stakeholders, and ensure operational readiness and regulatory compliance.

Build and own end-to-end authentication and authorization for the member platform, implement delegated/agent-based access and application-layer encryption, drive threat modeling and remediation, write RFCs and lead design reviews, and ship production code that protects sensitive member data.

Lead QA efforts for Cisco Meraki MX/Catalyst network security and SD-WAN features. Design and execute test strategies, build automation for CI/CD, validate security services (malware, IPS, URL filtering, SSL/TLS), and drive performance and scalability testing using traffic generators and AI-driven techniques.

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.