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 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.

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.

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.

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.

Lead enterprise security architecture across hybrid and multi-cloud environments. Develop and govern reference architectures, perform architecture reviews, drive remediation, and define security standards for identity, network segmentation, data protection, monitoring, CI/CD, and AI platforms. Partner with engineering teams, support incident response and audits, and ensure secure integration of acquisitions and research/AI workloads.

Senior technical authority for security architecture, engineering design, and enterprise risk mitigation. Designs, implements, and configures security solutions across firewalls, endpoints, monitoring, vulnerability management, incident response, and forensics. Leads tactical implementation, performs assessments, product evaluations, project support, and supports the Information Security program and strategic objectives.

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.

Define and manage security infrastructure roadmap; design, plan, test and troubleshoot network/security solutions; lead implementation of access and security infrastructure; produce technical specifications; manage large IT vendors; contribute to projects deploying next-generation security components.

Lead design, roadmap and implementation of network security infrastructure. Provide technical design, testing, troubleshooting, and vendor management for next-generation access and security solutions.

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.

Lead research and produce high‑impact network security insights. Advise clients on evaluation, selection and deployment of network security technologies, present at events, support sales, mentor analysts, and drive research agenda and process improvements.

Lead global security engineering and 24x7 operations for network, endpoint, cloud, and data protection platforms. Define strategy, drive modernization, enable secure cloud and AI adoption, ensure regulatory compliance, report metrics to executives, and build senior technical leadership.

Lead and remain hands-on for security engineering and operations: design and harden controls, build automation and detection, manage MDR, run incident response, and own vulnerability management, metrics, and cross-functional security integration.

Perform advanced offensive security work: conduct complex penetration tests, teach and integrate offensive tradecraft into the AI platform, harden product and company defenses, and collaborate with core engineers to build and ship capabilities that automate red-team techniques.