45 principal security engineer jobs at 27 companies in Frederick, CO
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Principal Security Engineer
San Francisco or Denver or New York City
$240k-$310k/yr OnsiteFull Time
10+ YOE10+ years security engineering experience; architecting secure systems, threat modeling, infra-as-code, and translating HIPAA/SOC2/PCI/HITRUST into engineering requirements; strong technical leadership and communication.
1mo
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Principal Security Engineer
Englewood or Austin
HybridFull Time
10+ YOE10+ years in security engineering or architecture with 3+ years as a principal/staff-level IC; hands-on with cloud (AWS, Microsoft Azure), IAM, VPC, Okta/Entra ID/Azure AD, EDR/XDR, SIEM, SOAR; knowledge of NIST CSF, ISO 27001, SOC 2; strong communication and risk-to-engineering delivery.
Okta, Microsoft Entra ID, Microsoft Azure AD, AWS, Microsoft Azure, IAM, VPC, EDR, XDR, SIEM, SOAR, NIST CSF, ISO 27001, SOC 2, FAA, EASA, DoD, CMMC
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Principal Engineer, Firmware Security
San Jose or Longmont or Folsom
$161k-$318k/yr OnsiteFull Time
10+ YOEBachelor's degree, 10+ years security firmware experience, applied cryptography and post‑quantum expertise, proficiency in C and Python, experience with SoC/FPGA debugging, and knowledge of storage security standards.
C, Python, Rust, JTAG, FPGA, SoC, Caliptra
2w
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Principal Security Engineer
Loveland, Colorado, United States
$120k-$180k/yr HybridFull Time
8+ YOE8+ years IT/cybersecurity experience with minimum 6 years cloud engineering; deep Azure expertise, Microsoft E5/Purview/Defender experience, data protection and DLP knowledge, scripting/automation (Python, PowerShell, Azure CLI); security certification preferred.
Azure, Microsoft Purview Data Lifecycle Management, Microsoft Defender, MS Fabric, Microsoft E5, Python, PowerShell, Azure CLI
3mo
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Principal Network Engineer
Denver, Colorado, United States
$160k-$180k/yr OnsiteFull Time
15+ YOE15+ years network engineering; 5+ years in service provider functions; routing/switching expertise; security tools experience; minimal travel; leads technical actions.
Cisco, Juniper, BGP, OSPF, EIGRP, Cisco ISE, Palo Alto
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Principal Systems Engineer
Centennial or Louisville
$174k-$239k/yr OnsiteFull Time
15+ YOEBachelor's in related field, typically 15+ years' systems engineering experience, active Secret U.S. security clearance, expertise in requirements, architecture, integration, V&V, and mentoring.
DOORS, CAMEO EA, Rhapsody, Matlab, SysML, Open Mission Systems (OMS), Universal Command and Control Interface (UCI), CCSDS, DTN, TSPI
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Principal Software Engineer
Denver, Colorado, United States
$225k-$270k/yr HybridFull Time
12+ YOEBachelor's in CS or equivalent; 12+ years software engineering; 5+ years in identity/security; hands-on leadership; strong Java; CIAM expertise.
Java, PostgreSQL, MySQL, OAuth, OpenID Connect, SAML, SCIM
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Principal Systems Engineer (TS/SCI with CI Polygraph)
Aurora, Colorado, United States
$225k-$300k/yr OnsiteFull Time
15+ YOE15–20 years' related experience; TS/SCI with CI Poly; BS in engineering or related field; MBSE/SysML; API design; cloud/hybrid integration; governance; security/compliance.
MBSE/SysML, JIRA, Confluence, System modeling, API design, Configuration management, Enterprise architecture frameworks, Cloud/hybrid integration
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Principal Application Security Architect - 861
Broomfield, Colorado, United States
$184k-$230k/yr OnsiteFull Time
10+ YOEBachelor's degree; 10+ years in app security; 5+ years software engineering; US person; security and compliance expertise.
SAST, DAST, CI/CD, OWASP Top 10, AWS, Azure, GCP, Python, Java, JavaScript, Go, Jenkins, Git
1w
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Principal Cyber Security Engineer
Denver, Colorado, United States
$129k-$215k/yr OnsiteFull Time
7+ YOEActive TS/SCI with poly required; 7+ years cyber experience; Bachelor’s degree or 4+ years additional cyber experience; DoD 8570 IAT II; RMF, STIG, VMWare, Windows/Linux, networking experience.
VMWare, vCenter, ESXi, Python, JavaScript, Perl, Elastic, Logstash, Kibana, Risk Management Framework (RMF), DoD STIG, IDS
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Principal Test Engineer
Lone Tree or Englewood
$143k-$197k/yr OnsiteFull Time
14+ YOEB.S. in engineering, 14+ years test engineering experience, V&V and systems integration expertise, mentorship experience, ability to obtain and maintain U.S. Secret security clearance, and ability to lift 25 lbs.
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Principal/Sr. Principal DevOps Engineer
Aurora or Morrisville
$114k-$213k/yr OnsiteFull Time
5+ YOEActive Top Secret/SCI with CI polygraph required; 5+ years relevant experience for Principal (8+ for Sr Principal); Linux administration, Agile experience, ability to obtain Security+, and experience with CI/CD and infrastructure automation.
Terraform, Kubernetes, AWS, Flux, Helm, DynamoDB, NATS, Grafana, Prometheus, Loki, Jenkins, GitLab, Bamboo, Linux, Big Bang
3w
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Principal RF Engineer
Boulder, Colorado, United States
$160k-$210k/yr HybridFull Time
U.S. citizen able to obtain security clearance; bachelor's in electrical engineering; extensive RF/microwave and antenna experience; HFSS/FEKO/CST/Microwave Office, MATLAB or Python proficiency; RF lab equipment experience; technical leadership and mentoring.
HFSS, FEKO, CST Studio Suite, Microwave Office, MATLAB, Python, Altium Designer
1w
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Principal Cybersecurity Engineer
Reston or Boulder
$185k-$277k/yr HybridFull Time
10+ YOE2+ Mgmt10+ years in cybersecurity with 2+ years technical leadership, Bachelor's degree, expertise in incident response, SIEM/SOAR, digital forensics, threat hunting, security automation, cloud-native security, scripting, and AI applied to security.
SIEM, SOAR, Agentic AI, Generative AI
2w
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Principal Cloud Developer
Andover or Houston or Durham or Fort Collins or Roseville
$152k-$349k/yr HybridFull Time
10+ YOEBachelor's degree in CS/engineering/IS,10+ years experience,proficiency in Python/Java/Golang/JavaScript,cloud security and systems design expertise,strong communication and mentoring skills.
Python, Java, Golang, JavaScript
2w
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Principal Cloud Developer
Andover or Houston or Durham or Fort Collins or Roseville
$152k-$349k/yr HybridFull Time
10+ YOEBachelor's degree in CS/engineering,10+ years experience,expertise in software design,programming (Python,Java,Golang,JavaScript),cloud security and architecture,mentoring and technical leadership.
Python, Java, Golang, JavaScript
2w
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Principal Cloud Developer
Andover or Houston or Durham or Fort Collins or Roseville
$152k-$349k/yr HybridFull Time
10+ YOEBachelor's in CS/engineering/IS (or related),typically 10+ years experience, strong programming in Python/Java/Golang/JavaScript, cloud security and systems design expertise, leadership and mentoring experience.
Python, Java, Golang, JavaScript
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Sr Principal Network Engineer
Aurora, Colorado, United States
$129k-$194k/yr OnsiteFull Time
8+ YOEBachelor's in STEM with 8+ years or Master’s with 6+ years; TS/SCI with full-scope polygraph; Security+ certified; 20% travel; experience with WAN/LAN, routers, switches, firewalls, load balancers; engineering and design of network systems.
Cisco routers, Cisco switches, firewalls, load balancers, Linux, Windows, COMSEC equipment
1mo
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Principal Electrical Engineer
Denver, Colorado, United States
OnsiteFull Time
10+ YOEBachelor's in EE, 10+ years electronics development experience (including 2+ years technical leadership), strong Altium skills, analog power electronics and high-speed digital design experience, PCB manufacturability and lab bring-up, ability to obtain U.S. security clearance.
Altium Designer, Microsoft Office, Microsoft Project, Git
1mo
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Principal Systems Engineer – RF Systems
Westminster, Colorado, United States
$118k-$201k/yr OnsiteFull Time
6+ YOEBS in engineering plus 6+ years experience (MS/PhD may substitute), systems engineering experience across lifecycle, RF/radar/communications/DSP/SDR/FPGA experience, requirements and integration experience, ability to obtain DoW security clearance.
MATLAB, Python, C/C++, Simulink, Jama, DOORS, FPGA
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