Top Senior Cyber Security Jobs in Denver & Boulder, CO

Lead cybersecurity consulting and engineering engagements securing OT and IT environments for water, wastewater, and environmental infrastructure clients. Conduct ICS, SCADA, network, architecture, risk, and compliance assessments; design secure IT/OT architectures; develop governance, incident response, security plans, and improvement roadmaps; evaluate security technologies; and support proposals and client presentations. Mentor junior staff and advise on cloud, IoT, AI, and critical infrastructure security.

Designs and implements security controls for AI and machine learning systems, including LLM threat modeling, guardrails, prompt-injection defenses, runtime detection, secure training pipelines, identity controls, and supply-chain protection. Leads AI red-team exercises, incident response, monitoring, and remediation while collaborating with privacy, legal, and compliance teams. The role also evaluates third-party AI services and stays current with adversarial ML, LLM security research, and regulatory developments.

Designs and operates security controls for AI/ML systems, including threat detection, incident response, cloud and application security, model governance, adversarial testing, and security automation. Builds production tooling across AI platforms such as SageMaker, Azure OpenAI, and Databricks; applies MITRE ATLAS, OWASP AI Top 10, and NIST AI RMF frameworks; and integrates enterprise security platforms to protect models, data, pipelines, and AI applications.

Leads enterprise security engineering across tools, cloud environments, identity, vulnerability management, incident response, compliance, and security operations. Oversees SIEM, endpoint, email, privileged access, and network security technologies; coordinates investigations, assessments, remediation, and managed security providers. Leads a three-person security team, mentors staff, improves workflows through automation, and communicates technical risks to leadership and clinical stakeholders.

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.

Leads technical security engagements involving presentations, demonstrations, workshops, architecture design, and production-ready pilots. Designs and proves Microsoft and third-party cloud security, compliance, privacy, XDR, zero trust, and data protection solutions. Collaborates with sales, consulting, and partner teams, resolves technical and competitive blockers, influences strategy, and guides customer implementations. The role requires strong technical pre-sales or consulting experience and expertise in cloud, hybrid, and on-premises infrastructure.

Lead identity and access management implementations for federal and enterprise customers. Responsibilities include IAM solution design, architecture, deployment, integration, testing, troubleshooting, documentation, customer workshops, and knowledge transfer. The consultant provides technical leadership, advises stakeholders on authentication and identity governance, collaborates across project teams, and mentors junior consultants. The role requires extensive IAM consulting experience, strong security technology knowledge, active Top Secret clearance with full-scope polygraph, and customer-facing technical leadership.

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.

Own infrastructure security for LiveKit’s production platform. Map cloud security posture, prioritize and remediate infrastructure risks, harden IAM, secrets, networks, tenant isolation, and media storage, and build secure infrastructure-as-code guardrails. Partner with compliance teams on PCI-DSS and ISO 27001 controls and automate audit evidence. The role requires cloud, Kubernetes, Terraform, scripting, and production infrastructure security experience, with AI security and real-time media experience preferred.

Designs, implements, tests, and supports enterprise network security systems and web proxy capabilities. Defines security requirements, develops test plans, analyzes network traffic, manages engineering milestones, identifies vulnerabilities, and resolves complex technical issues. Requires expertise in networking, TLS, firewalls, proxies, advanced content filtering, and at least one specialized security technology such as F5 load balancers, malware scanning, NSX Defender, or cloud security solutions.

Provides customer-facing cybersecurity expertise during presales engagements. Consults with CIOs, CISOs, security engineers, and procurement teams; educates sales teams; develops cybersecurity collateral, use cases, and service offerings; supports solution scoping and statements of work; and demonstrates security technologies including DLP, DSPM, DDR, and file encryption. The role requires strong cybersecurity knowledge, presales consulting experience, security framework familiarity, product expertise, and up to 20% travel.

Provides customer-facing presales cybersecurity expertise focused on OT and IoT environments. Advises executives, security teams, and procurement stakeholders; develops security services, sales collateral, use cases, system and network diagrams, and lab demonstrations. Educates sales teams, stays current on security technologies and trends, and supports consultative solution engagements involving industrial protocols, asset visibility, traffic analysis, segmentation, cloud security, and security frameworks.

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 the design, implementation, and maintenance of secure IT infrastructure. Harden Windows systems, Active Directory domains, hypervisors, and security configurations; manage PKI and Group Policy; conduct threat monitoring, vulnerability assessments, incident response, and digital forensics. Develop security controls, document breaches, evaluate security technologies, and mentor junior engineers. The role requires an active Secret clearance, ability to obtain Top Secret with SCI eligibility, and occasional travel.

Build and operate security controls, telemetry, detections, and enforcement for NVIDIA’s large-scale EDA compute, storage, and networking infrastructure across on-premises and multi-cloud environments. Investigate threats, respond to incidents, automate secure configurations and compliance evidence, threat-model infrastructure, and manage security technology lifecycles. The role requires hands-on Linux, networking, programming, infrastructure security, and collaboration with infrastructure and security teams.

Owns and strengthens the security posture of cloud-based SaaS and Microsoft 365 environments. Responsibilities include vulnerability management, incident response, cloud and endpoint hardening, identity and data protection, secure configuration, monitoring, compliance evidence, customer security reviews, and risk management aligned with HITRUST, HIPAA, NIST, and related frameworks.

Designs, implements, configures, and supports enterprise cybersecurity solutions across IAM, endpoint, network, email, application, cloud, and security awareness domains. Conducts vulnerability assessments, threat hunting, incident investigation, security tool tuning, policy development, and security architecture reviews. Serves as a security subject matter expert on technology projects, collaborates with an MSSP, provides incident escalation support, and maintains availability for critical security operations.

Leads architecture and implementation of Microsoft Red Team visibility, telemetry, monitoring, detection, alerting, deconfliction, and operational security capabilities. Designs scalable services and data pipelines, maintains authoritative operational asset inventories, identifies systemic security gaps, and drives durable engineering solutions. Provides hands-on technical leadership, architecture reviews, debugging, incident response, mentorship, and cross-organizational influence while enabling authentic Red Team operations with strong defensive visibility and control.

Engineer and maintain enterprise network security platforms across on-premises and cloud environments. Design firewall and network security solutions, troubleshoot complex connectivity and security issues, and automate infrastructure operations using scripting, APIs, Infrastructure as Code, configuration management, and CI/CD pipelines. Support platform upgrades, vulnerability remediation, monitoring integrations, validation processes, and modernization initiatives while collaborating with network, cloud, application, and security teams.

Build and scale platform security through architecture reviews, threat modeling, IaC hardening, IAM improvements, Kubernetes security, and disaster recovery exercises. Develop automation for detection, response, compliance, onboarding, access anomaly detection, and self-service security posture checks. Investigate incidents, track root-cause remediation, support SOC 2 evidence collection, and collaborate closely with software engineers on secure development and incident response.

Conduct penetration tests across infrastructure, networks, web and mobile applications, and cloud environments. Perform application and cloud security testing, simulate adversary techniques, develop custom security tools, document vulnerabilities, validate remediation, and support HIPAA, SOC 2, and PCI DSS compliance. Collaborate with engineering and product teams, track emerging threats, and contribute to purple-team exercises, tabletop events, and security training.

Deploys and monitors AWS cloud platforms under DoD RMF and JSIG requirements. Develops infrastructure-as-code and configuration-as-code using Ansible and Terraform, operates Splunk security monitoring on Kubernetes, performs vulnerability assessments, and collaborates with engineering and networking teams. Requires DoD network experience, Windows or Linux expertise, Splunk administration, cloud and Kubernetes experience, Security+ or higher certification, and an active TS/SCI clearance.

Lead enterprise security architecture across cloud, application, infrastructure, identity, data, and third-party environments. Develop security principles, standards, patterns, and controls; review designs; conduct threat modeling and risk assessments; guide secure-by-design implementations; and advise technical and business stakeholders. The role also supports regulatory compliance, evaluates security technologies, and strengthens organizational security practices.

Design and ship product security improvements covering authentication, authorization, session and token handling, secrets management, third-party access, abuse detection, fraud prevention, and account takeover defense. Threat-model systems, remediate vulnerabilities, build secure developer tooling, and partner with Product, Engineering, and Trust & Safety. Mentor engineers and use AI-assisted development while balancing security controls with user experience.

Build and automate security infrastructure across AWS and Kubernetes, including cryptographic material lifecycle, telemetry pipelines, policy-as-code, compliance monitoring, and incident-response tooling. Develop agentic AI workflows using coding assistants, MCP integrations, and custom harnesses. Apply threat modeling and secure architecture review while partnering with engineering, risk, auditors, vendors, and clients. The role emphasizes production software, cloud-native automation, continuous control monitoring, and eliminating manual security toil.