Top Cyber Security Jobs in Denver & Boulder, CO

Provide cybersecurity engineering support for programs: validate security requirements and designs, perform technical assessments and A&A documentation under NIST RMF, support incident response, identify and mitigate system risks, and implement enterprise security controls using tools like Splunk, Tenable, and HBSS. Requires coordination with engineers, PMs, and stakeholders and maintaining system Authorizations to Operate.

Provide cybersecurity engineering support to develop, validate, and maintain secure systems. Manage cyber requirements, perform technical security assessments, support Incident Response and Assessment & Authorization (A&A) per NIST RMF, produce A&A documentation, mitigate risks, and advise architects and program stakeholders on security design and compliance.

Provide cybersecurity engineering support for systems to achieve and maintain Authorizations to Operate (ATO). Validate security requirements and designs, perform technical security assessments, support RMF A&A documentation, incident response, risk management, and advise architects and PMs on secure implementations across the mission lifecycle.

Provide cybersecurity engineering support for space and mission systems: manage cyber requirements, validate technical security implementations, perform technical assessments, support RMF/A&A and authorization activities, assist incident response, advise architects on secure designs, and produce security documentation and risk mitigation strategies.

Senior security engineer responsible for developing automation and tooling, building and deploying security solutions, conducting incident response and proactive threat hunting, supporting investigations through data analysis, and advising development teams. Must document solutions, participate in agile teams, mentor juniors, and continuously research evolving security threats.

Lead applied research on agentic AI for cybersecurity: develop efficient post-trained models, agent designs, and rigorous evaluation/verification. Partner with security teams to translate research into products, run experiments, and publish novel techniques.

Entry-level System Security Engineer supporting cybersecurity engineering for space and mission systems. Manage cyber requirements, design secure systems using MBSE, validate technical security implementations, and support Assessment & Authorization (A&A) to obtain/maintain Authorizations to Operate (ATO). Collaborate with cross-functional teams, apply NIST/DISA/CIS standards, perform risk analysis and security planning, and integrate DevSecOps and software security engineering practices into system development.

Provide systems security engineering support for space/mission systems: manage cyber requirements, validate technical security implementations, support ATO/Assessment & Authorization, develop program protection and anti-tamper plans, perform threat analysis (including Threat Countermeasure Trees), brief leadership, and document security guidance and reports across the acquisition lifecycle.

Lead AI security strategy and guardrails, design and review AI gateways and tooling, scale InfoSec review processes, reduce AI-driven security noise, drive remediation and investigations, and mentor security and platform engineers.

Lead system security engineering for aerospace/defense programs: define and validate cyber requirements, design secure systems (MBSE), manage A&A/ATO processes, integrate DevSecOps and cyber tools, perform risk assessments, and coordinate with stakeholders and program leadership.

Lead client engagements to design and implement secure network architectures (Zero Trust, SASE/SSE, segmentation, OT security). Manage teams, mentor staff, oversee enterprise network security configurations, and ensure project delivery and quality. Collaborate with clients to align security strategies with business objectives and drive innovation in network security practices.

The Staff Security Engineer will lead technical security initiatives, own architectural security decisions, mentor engineers, and align teams on security strategy while ensuring system integrity and compliance.

Lead a team building and operating secure, resilient distributed systems for secrets, PKI, and machine/workload identity. Plan roadmap, review designs and code, participate in implementation, support operations and on-call, and grow team members.

The Network Security Architect will assess network security, guide teams, enhance security policies, design network solutions, and mentor engineers while aligning with a Zero Trust Strategy.

As a Security Engineer, you will conduct security assessments, develop security tools, perform architecture reviews, and collaborate on advanced security research.

Lead and mentor a small IT security engineering team to deploy and operate enterprise-grade Zero Trust security across networks, endpoints, applications, and cloud. Drive Customer Zero initiatives, manage cross-functional security projects, optimize policies (SSL decryption, segmentation, access control), and serve as an internal subject-matter expert.

Design, develop, and maintain Windows-focused PAM components including services, agents, and RDP handlers. Integrate with Windows APIs, authentication and privilege models, implement secure credential handling and policy enforcement, collaborate with backend teams, perform code reviews, and troubleshoot complex Windows OS and enterprise configurations.

Serve as the technical bridge between Product/Engineering and Customer Success to own onboarding, integrations, reference architectures, and troubleshooting for Zafran's cybersecurity platform. Influence product roadmap, advise R&D, and drive customer adoption and technical outcomes.

Lead technical discovery and design for enterprise customers, deliver demos and workshops, build architectures and POCs, influence sales strategy and product roadmap, enable partners, and create reference architectures and playbooks to support pre-sales and strategic deployments.

The fellowship provides military spouses and separating service members with cybersecurity training and hands-on experience through projects and vendor training, aimed at enhancing their security skills.