Top Security Engineer Jobs

Serve as security engineering representative on teams to design, implement, evaluate, and integrate IA architectures, secure networking, computing, and enclave environments. Apply IA policy and procedures, support security planning, assessment, risk analysis/management, identify data handling requirements, and enforce trusted relationships with external systems while interacting with customers and project teams.

Design, implement, and maintain network security solutions (firewalls, IDS/IPS, proxies, VPNs). Perform advanced Layer 3/4 packet analysis, investigate security incidents, manage policies, troubleshoot complex network issues, and support client remediation and change requests.

Design, implement, and maintain security controls across cloud, on-prem, air-gapped and classified environments. Support monitoring, detection, incident response, vulnerability management, IAM, secure SDLC, and GRC activities including audit readiness and NRC/classified facility support.

Implement and maintain the credit union's cybersecurity infrastructure and controls—focusing on Microsoft 365 E5 security, cloud collaboration protection, email security, incident response, vulnerability and risk management, MDR/SIEM coordination, compliance (GLBA/financial regulations), security documentation, and staff mentoring.

Build and operate an internal Red Team to continuously find vulnerabilities across protocol, consensus, bridges, and execution clients. Develop Rust-based fuzzers and custom security tooling, simulate economic attacks on testnet, analyze game-theoretic risks (MEV, staking), and partner with engineering teams to review critical architecture and mitigate exploits.

Support STARE Product Office cybersecurity activities at Redstone Arsenal: manage ATO/A&A packages, assess system confidentiality/integrity/availability, enforce DoD/Army CS standards, coordinate RMF and eMASS activities, prepare briefings, support security testing, and liaise with program offices. Approximately 25% travel.

Designs, implements, and maintains Palo Alto-based secure network access for enterprise customers. Migrates legacy firewalls, builds security policies, troubleshoots via log/packet analysis, supports SD‑WAN/remote access, mentors on upgrades, and collaborates with network, cloud, and operations teams. Provides on-call support and ensures deliverables meet project scope.

Design, implement and maintain network security solutions (firewalls, IDS/IPS, proxies, VPNs) for customer networks; perform packet analysis, incident identification and remediation support; manage security policies, encryption and network device configurations; document processes and deliver billable project work on schedule.

Support and secure mainframe production environments. Manage data center technologies, maintain/enhance security infrastructure, work with mainframe tools (Tivoli, Omegamon), TSO/MVS/JCL operations, RACF/CA-Top Secret, and collaborate with third-party mainframe vendors.

Perform offensive and defensive security operations: configure and operate vulnerability scanning, patching, asset discovery, penetration testing, and exposure management. Assess and remediate vulnerabilities across hosts, apps, VMs and cloud. Support threat assessments, adversary emulation, AI system vulnerability testing, and develop defensive/offensive AI agents. Collaborate with DevOps, engineering, and stakeholders in Agile teams and produce security reports.

Provide security oversight for network and mainframe systems, conduct security auditing, risk assessments and penetration testing, evaluate security architecture, recommend hardware/software, support disaster recovery testing and documentation, and help create and review information security policies and standards.

Designs and enforces cloud security controls for primarily AWS environments; conducts audits, penetration testing, vulnerability management, incident response, and maintains CSPM, secrets management, and encryption controls while advising leadership on risk.

Assist senior engineers to design, architect, test, and deploy secure classified network and firewall solutions for USG environments. Implement and harden COTS/GOTS/open-source components, define security requirements and interfaces, coordinate security assessments, support compliance with Federal/DoD/IC guidance, and assist operational monitoring, incident response, and documentation.

Implement, install, and configure SIEM (IBM QRadar); perform vulnerability assessments and Qualys scanning; manage assets via Remedy; design and document network/security architecture; work with Cisco and Check Point firewalls and F5 load balancers; ensure PCI compliance and scan processes; train staff on QRadar when needed.

Designs and implements multi-vendor network security solutions (firewalls, IDS/IPS, proxies, VPNs). Maintains and troubleshoots network security infrastructure, performs packet analysis, evaluates risks, produces process documentation, and supports incident identification and remediation to protect telecommunications and client networks.

Join the security team to run security operations, monitoring, incident response, application and infrastructure security reviews, bug bounty management, and compliance (SOC 2, ISO 27001, GDPR). Participate in on-call rotations, triage alerts, remediate vulnerabilities (libraries, images, containers), threat model systems, and integrate defensive tooling to protect SaaS and on-prem deployments.

Designs, deploys, and maintains information security systems (firewalls, SIEM, IDS/IPS, WAF), performs audits, incident response, vulnerability management and penetration testing, develops access controls and BCP/DR plans, and advises stakeholders on security risks and remediation.

Perform security assessments and analysis; design, implement, and deploy security solutions (vulnerability management, anti-malware, IDS/IPS, SIEM, UEBA, network flow monitoring); develop security automation; support application security via static analysis, dependency management, and secure CI/CD; coordinate with global IT to mitigate risks and handle security events and incidents.

Embed security into product design and development lifecycle: perform architecture reviews and threat modeling, run AI-assisted and manual security assessments, mature vulnerability management, guide developers on secure coding, support incident response, and automate SAST/DAST and CI/CD security tooling across cloud and on-prem environments.

Maintain enterprise cyber system security through incident response, advanced forensic and malware analysis, network traffic and packet analysis, signature development, SIEM correlation, and support for internal and external investigations.

Design, implement, and maintain network security solutions (firewalls, IDS/IPS, proxies, VPNs). Perform advanced packet analysis, incident identification and remediation, router/switch management, risk analysis, and produce process documentation. Support customer projects, troubleshoot complex connectivity issues, and stay current on network security trends.

Lead the security function end-to-end at an early-stage B2B fintech: drive application and product security, threat modeling, secure design and code review, vulnerability remediation, cloud and Kubernetes hardening, logging and detection, incident response, and SOC 2 foundations. Define roadmap, embed security into engineering, and partner with teams to build secure-by-default products.

Lead and operate information security controls and programs for a global organization. Perform risk assessments, vulnerability and penetration testing, incident response, IAM reviews, third-party risk assessments, phishing program management, audits/compliance, and security consulting. Manage security tooling and documentation while partnering with stakeholders to implement and mature security standards and remediation activities.

Own daily IT operations for a distributed SaaS company: manage Google Workspace/Okta/Iru, identity and device lifecycle, AV and office systems, monitor security posture, lead one IT FTE and contractors, manage vendors and IT budget, support compliance (SOC 2/ISO 27001), and drive automation and integrations.

Lead design, implementation, and management of enterprise network security across global offices. Manage firewalls, routers, switches, patch and vulnerability remediation, SIEM/incident escalation, cloud security, and vendor interactions. Drive vulnerability assessments, CVE research, patch processes, documentation, and cross-team remediation efforts to protect systems and applications.