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47 principal security engineer jobs at 25 companies in Longmont, CO

2mo
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Principal Security Engineer
San Francisco or Denver or New York City
$240k-$310k/yr OnsiteFull Time
Candid Health
Candid Health: Private revenue cycle management software automating billing for healthcare providers.
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.
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2mo
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Principal Security Engineer
Englewood or Austin
HybridFull Time
Jeppesen
Jeppesen: Private aviation software providing flight planning, navigation data, and operations tools to pilots, airlines, and fleets.
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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2w
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System Security Engineer - Principal
Broomfield or Boulder
$118k-$201k/yr OnsiteFull Time
BAE Systems
BAE SystemsLSE: BA.: Global defense, aerospace, and security technology.
6+ YOEBachelor's degree in engineering or related technical field and 6+ years of experience required. Active Top Secret clearance, ability to obtain Top Secret/SCI, and DoW-compliant security certification required.
Model Based Systems Engineering (MBSE), Splunk, Tenable SC, ACAS, HBSS, AWS, NIST, DISA STIGs, CIS benchmarks
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3mo
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Principal Engineer, Firmware Security
San Jose or Longmont or Folsom
$161k-$318k/yr OnsiteFull Time
Micron Technology
Micron TechnologyNASDAQ: MU: Global leader in memory and storage semiconductor solutions.
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
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3mo
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Principal Network Engineer
Denver, Colorado, United States
$160k-$180k/yr OnsiteFull Time
Entarian
Entarian: Private engineering and federal technology services provider serving U.S. space, defense, and civilian government agencies.
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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3w
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Principal Systems Engineer
Centennial or Louisville
$174k-$239k/yr OnsiteFull Time
Sierra Space
Sierra Space: Commercial space and defense technology.
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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3mo
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Principal Software Engineer
Denver, Colorado, United States
$225k-$270k/yr HybridFull Time
FusionAuth
FusionAuth: Private developer-focused CIAM software providing authentication, authorization, and user management for application teams.
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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4w
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Principal Cyber Security Engineer
Denver, Colorado, United States
$129k-$215k/yr OnsiteFull Time
ManTech International
ManTech International: Advancing the future of defense through innovative technology.
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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2mo
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Principal Systems Security Engineer / Senior ISSM
Lone Tree or Englewood
$165k-$227k/yr HybridFull Time
Sierra Nevada Corporation
Sierra Nevada Corporation: Aerospace and national security contractor providing innovative technology solutions.
12+ YOE8+ MgmtTop Secret/SCI required. 12+ years IT security experience (or 16 years without degree), 8+ years ISSM experience, hands-on Nessus/Tenable, ELK, Splunk, DISA STIG application, NIST 800-53 RMF/ATO ownership, eMASS/XACTA, RHEL, vSphere, GitLab/GitHub, Bash.
Nessus, Tenable.sc, Tenable Security Center, Elasticsearch, Logstash, Kibana, Splunk, eMASS, XACTA, RHEL, vSphere, VMware, GitLab, GitHub, Bash, NIST 800-53 Rev 5, ISO 27001, CMMC
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2d
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Principal Engineer, Casting
Loveland or Centennial or Knoxville or Mount Vernon
OnsiteFull Time
Beehive Industries
Beehive Industries: U.S.-based manufacturer of additively manufactured jet engines for uncrewed aerial defense applications.
15+ YOE5+ MgmtBachelor’s or master’s degree in a relevant engineering or materials field, 15+ years of precision investment casting experience, 5+ years in technical leadership, and ability to obtain a U.S. government security clearance.
MAGMASOFT, ProCAST, 8D, FMEA, Six Sigma, RCCA
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1w
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Principal AI Security SA, AWS Security & Networking
San Francisco or Seattle or Arlington or New York or Denver
$183k-$284k/yr OnsiteFull Time
Amazon
AmazonNASDAQ: AMZN: Multinational technology focused on e-commerce and cloud computing.
10+ YOE10+ years in technology domains, bachelor's degree in computer science, engineering, or mathematics, cloud transformation experience, executive communication, and security or AI architecture expertise.
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1mo
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Principal RF Engineer
Boulder, Colorado, United States
$160k-$210k/yr HybridFull Time
FIRST RF
FIRST RF: Private U.S. defense and aerospace manufacturer designing and producing advanced antennas and RF systems for mission-critical applications.
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
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1mo
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Principal Cybersecurity Engineer
Reston or Boulder
$185k-$277k/yr HybridFull Time
Workday
WorkdayNASDAQ: WDAY: Enterprise cloud applications for finance and human resources.
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
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1mo
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Principal Cloud Developer
Andover or Houston or Durham or Fort Collins or Roseville
$152k-$349k/yr HybridFull Time
Hewlett Packard Enterprise
Hewlett Packard EnterpriseNYSE: HPE: Global edge-to-cloud advancing how people live and work.
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
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1mo
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Principal Cloud Developer
Andover or Houston or Durham or Fort Collins or Roseville
$152k-$349k/yr HybridFull Time
Hewlett Packard Enterprise
Hewlett Packard EnterpriseNYSE: HPE: Global edge-to-cloud advancing how people live and work.
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
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1mo
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Principal Cloud Developer
Andover or Houston or Durham or Fort Collins or Roseville
$152k-$349k/yr HybridFull Time
Hewlett Packard Enterprise
Hewlett Packard EnterpriseNYSE: HPE: Global edge-to-cloud advancing how people live and work.
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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20h
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Principal Software Engineer
Bengaluru or Denver
OnsiteFull Time
Ping Identity
Ping Identity: Identity security software serving enterprises with workforce and customer identity, access management, authentication, and fraud protection.
10+ YOE10+ years of software engineering experience, including 4+ years at Principal or Staff level building security or identity products. Requires Go, cloud-native technologies, Kubernetes, distributed systems, IAM/PAM, and OAuth2/OIDC expertise.
Go, AWS, Azure, GCP, Kubernetes, Cassandra, NoSQL, Temporal, OAuth2, OIDC, SAML, SCIM, SSH, RDP, MCP
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3d
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Principal / Sr. Principal DevOps Engineer (AHT)
Aurora or Morrisville or Sacramento
$114k-$204k/yr OnsiteFull Time
Northrop Grumman
Northrop GrummanNYSE: NOC: Global aerospace and defense technology.
5+ YOETop Secret clearance, active CI polygraph, U.S. citizenship, AWS, Kubernetes, Terraform, Security+, Linux administration, Agile experience, and 3+ preferred qualifications. Principal requires 5+ years; Sr. Principal 8+ years with a bachelor's degree.
AWS, Kubernetes, Terraform, Linux, Flux, Helm, DynamoDB, NATS, Big Bang, Grafana, Prometheus, Loki, Jenkins, GitLab, Bamboo
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2mo
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Principal Electrical Engineer
Denver, Colorado, United States
OnsiteFull Time
Performance Drone Works
Performance Drone Works: American defense technology mass-manufacturing aerial robotic systems and software for defense and public-safety customers.
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
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2w
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PRINCIPAL ELECTRICAL ENGINEER - POWER SYSTEMS
Denver or United States
$155k-$186k/yr HybridFull Time
CLP Engineering
CLP Engineering: Private utility infrastructure designing, building, financing, and operating power-distribution systems for U.S. military and municipal customers.
12+ YOE5+ MgmtBSEE in electrical engineering, PE license, 12+ years in electric utilities including 5+ years in lead, supervisory, or project management roles, power systems expertise, US citizenship, driver's license, and security clearance.
ETAP, Microsoft Project, SKM, EasyPower
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