Top Senior Cyber Security Jobs in Denver & Boulder, CO

Build and operate secure, resilient distributed systems for secrets and key management across Cloudflare’s global network. Re-architect internal PKI and machine or workload identity systems, participate in on-call incident response, support internal developers, and advise engineering teams on secure system design. The role requires software development, distributed systems expertise, Linux/UNIX administration, and hands-on security implementation experience.

Secure Runpod’s multitenant GPU cloud infrastructure across bare-metal and virtualized environments. Responsibilities include designing workload and network isolation, hardening Linux kernels and container platforms, testing hypervisor and hardware security, developing low-level controls in C, Go, or Rust, securing GPU and PCIe interactions, and responding to infrastructure security incidents with forensic capabilities for ephemeral containers.

Leads AI-focused application security across software, cloud, hardware, and firmware. Conducts security assessments and AI-driven red-team exercises, develops secure-code fixes and AI-enabled security tooling, validates controls for LLM and agentic systems, and shapes organization-wide AI security strategy. Partners with engineering, hardware, and executive stakeholders to identify threats, implement mitigations, and safely adopt AI within security operations.

Architects and manages enterprise security engineering, threat detection, vulnerability assessment, security hardening, incident response, and security policies across cloud, on-premises, and SaaS environments. The role monitors security logs, supports compliance, advises on vendors and implementations, integrates security into the development lifecycle, and participates in on-call and change management activities.

Lead cryptographic security assessments of protocols, libraries, applications, and high-assurance systems. Analyze advanced cryptographic constructions, identify design and implementation weaknesses, validate exploitability, and recommend remediation. Build testing and analysis tools, manage client delivery, write precise technical reports, mentor engineers, contribute to methodologies and services, and support open-source research and technical publications.

Build and scale backend security platform services, including authentication, authorization, identity infrastructure, permission systems, and data models. Lead cross-team technical initiatives, standardize security solutions, collaborate with compliance and mission stakeholders, and influence architecture and engineering standards. The role requires strong system design, backend development, security expertise, technical leadership, and the ability to operate in sensitive environments.

Leads secure enterprise architecture design and GitLab Professional Services implementations across application security, cloud security, DevSecOps, identity, vulnerability management, and compliance. Guides SaaS, Self-Managed, and Dedicated deployment decisions; leads CI/CD, source control, and security-tool migrations; conducts risk assessments and threat modeling; supports pre-sales scoping and statements of work; coordinates cross-functional delivery; mentors consultants; and develops security enablement materials.

Designs, implements, and improves enterprise security capabilities across endpoint, cloud, network, data protection, email security, vulnerability management, SIEM, SOAR, and Zero Trust environments. Owns major security platforms including Rapid7, Microsoft Defender, Microsoft Purview, Mimecast, and Zscaler. Develops scalable architectures, detection and automation workflows, vulnerability controls, email protections, and security integrations while partnering with infrastructure, network, cloud, application engineering, security operations, and MDR teams.

Provides technical leadership for enterprise AI security, designing secure AI platform architectures, vetting frameworks, identity and posture management for AI agents, and preventative security guardrails. The role requires building scalable security systems with Python, Go, or Java, managing infrastructure as code, addressing cloud and container security, mentoring engineers, and advising leadership on AI security risks.

The Senior Security Engineer architects, implements, and supports enterprise security capabilities across vulnerability management, cloud security, identity, endpoint, application security, and security architecture. The role leads security initiatives, resolves complex platform issues, develops automation and AI-assisted workflows, establishes documentation and reporting standards, and mentors security engineers and analysts while partnering across infrastructure, application, network, cloud, and security teams.

Designs, deploys, troubleshoots, and supports enterprise network and security infrastructure, including routing, switching, firewalls, wireless, cloud networking, VPNs, and data center services. The role analyzes operational incidents, implements remediation, maintains documentation, communicates with management, supports roadmap decisions, and participates in on-call rotations. It requires extensive experience with multi-vendor network security technologies, cloud platforms, and customer-facing technical work.

Lead architecture and hands-on development of Microsoft's AI Safety Platform, building observability, detection, investigation, threat-hunting, and distributed data-processing capabilities. Design attack detection infrastructure, correlate high-volume telemetry, apply AI security research, conduct security and privacy reviews, and partner across engineering, science, and incident response teams. Mentor engineers and provide technical leadership for complex AI security systems.

Lead enterprise network segmentation projects using Guardicore Micro Segmentation across data center and cloud environments. Responsibilities include architecture design, project planning, installation, integration, configuration, policy deployment, documentation, customization, training, optimization, and troubleshooting. The role partners with customers, Support, and Engineering teams to deliver successful implementations and improve post-sales satisfaction.

Designs and integrates secure information systems, cloud, and defense architectures; leads federal NIST RMF and ATO processes; implements security controls; performs vulnerability, threat, and risk assessments; advises engineering and program teams; and manages continuous monitoring, compliance, audit, and patch-management activities.

Designs and implements scalable trust and identity infrastructure, including secrets management, PKI, authentication, and access control services. The role defines architecture, leads technically complex initiatives, improves engineering standards and reliability, and partners across Product, Security, Compliance, and Engineering. It requires strong systems engineering experience with Linux, networking, distributed systems, modern programming languages, and infrastructure tooling. Occasional on-call nights and weekends may be required.

Leads technical security sales engagements through demonstrations, proofs of concept, hackathons, architecture workshops, and customer consultations. Designs secure, scalable cloud and hybrid architectures, resolves technical blockers, and advises customers on Microsoft Security solutions, including Defender and Sentinel. Develops security posture recommendations, supports XDR, zero trust, cloud security, and AI adoption strategies, while influencing technical decisions and representing Microsoft in developer communities.

Owns end-to-end security engineering, including risk identification, secure-by-default libraries, least-privilege guardrails, developer machine hardening, supply-chain security, and identity and authentication protections. Partners with compliance to implement effective controls for healthcare requirements such as HIPAA and HITRUST. The role requires production software engineering and security expertise, with broad autonomy in a fully remote environment.

Designs, implements, maintains, and improves cybersecurity controls across enterprise systems, networks, cloud environments, and applications. Deploys and troubleshoots security technologies, responds to incidents, identifies security requirements, supports audits and change management, documents procedures, analyzes risks, and delivers remediation recommendations. Collaborates with architects, project managers, engineers, and stakeholders to protect organizational data and infrastructure while automating repeatable security tasks.

Designs and advances security architecture for Microsoft’s enterprise productivity environment. The role assesses evolving risk, analyzes systems and telemetry, develops reusable security patterns and tooling, partners with engineering teams on deployment, communicates risk and tradeoffs, and establishes priorities and roadmaps amid incomplete information.

Identify and remediate vulnerabilities across products and AWS infrastructure, respond to security incidents, close security tickets, integrate security controls into CI/CD, review code and infrastructure, support SOC 2 and CASA compliance, and strengthen access management, secrets handling, and cloud hardening.

Leads and builds NVIDIA’s AI Safety and Security Engineering team, hiring engineers across platform, security research, evaluation, and vulnerability tooling. Owns the Find, Validate, and Patch roadmap; guides architecture and evaluation trade-offs; partners with security, platform, and evaluation leaders; and communicates engineering progress clearly. The role requires extensive software engineering and engineering management experience, with expertise in complex systems, ML infrastructure, security tooling, or distributed platforms.

Develops secure, isolated attack scenarios across cloud, on-premises, and hybrid environments. Reproduces vulnerabilities, builds multi-step attack chains, creates automated graders and reward signals, and validates outcomes using system state and telemetry. The role also develops attack variants and benign comparisons to evaluate AI security agents, partnering with threat researchers, AI engineers, and environment engineers.

Lead security reviews, code audits, penetration testing, vulnerability research, and mitigation efforts for Microsoft Windows services. Develop reusable security tools and agents, identify attack vectors and architectural risks, demonstrate exploit impact, and collaborate with product engineering teams to design scalable defenses and improve security investments.

Architect and engineer multi-tenant SIEM, SOAR, EDR, telemetry, and cloud security platforms for managed security services. Build detection content, automate response workflows, optimize log ingestion, and secure customer connectivity. Lead technical discovery, onboarding, security assessments, remediation planning, escalations, solution design, and customer advisory engagements. Create architectures, runbooks, and documentation while shaping the MSSP technology strategy.

Leads regional enterprise security sales by serving as a cloud security expert, shaping opportunities, advising account teams, managing executive relationships, and orchestrating technical teams and partners. Conducts architecture reviews, demos, proof-of-concepts, pilots, ROI/TCO analyses, and consultative engagements to promote Microsoft security solutions, Zero Trust adoption, and customer business outcomes.