7 security engineering intern jobs at 6 companies in Colorado

2mo
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Senior Manager, Engineering - Platform Security
Denver or New York City or San Francisco
$228k-$274k/yr HybridFull Time
Fastly
FastlyNYSE: FSLY: Provides edge cloud platform for content delivery and cybersecurity.
4+ YOE4+ Mgmt4+ years managing Platform or Site Reliability Engineering teams; 10+ years distributed systems; experience with secrets/workload identity; large-scale production infra in cloud and on-prem; Linux internals; Python or Go a plus.
Kubernetes, PKI, Chef, Python, Go, Terraform, HashiCorp Vault, SPIFFE, SPIRE, Linux
5h
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2026 Fall Intern - Inflight Experience Operations Strategy
Denver, Colorado, United States
$20-$24/hr OnsiteFull Time
Frontier Airlines
Frontier AirlinesNasdaq: ULCC: Provides low-fare passenger air transportation services across the Americas.
Currently pursuing a degree in business/aviation/operations/engineering/computer science; must pass FAA criminal background checks and be able to secure airport/SIDA or customs badges; strong communication and MS Office skills.
Microsoft Word, Microsoft Excel, Microsoft PowerPoint, Microsoft Outlook
3w
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Cyber Researcher, Attack Emulation (Senior / Principal)
Burlington or Golden or Israel
$180k-$220k/yr RemoteFull Time
Pentera
Pentera: Automated security validation and penetration testing platform
5+ YOE5+ years security research/penetration testing, 3+ years Python, strong Windows/Linux internals, reverse engineering, cloud (AWS/Azure), and proficiency with security tools (Metasploit, Nmap, Burp).
Python, Metasploit, Impacket, Nmap, Burp, IDA, Ghidra, WinDBG, Radare2, Windows, Linux, AWS, Azure
3w
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Staff Software Engineer (Web Automation & Open Banking Infrastructure)
California or Colorado or United States
RemoteFull Time
Zero Hash
Zero Hash: Infrastructure platform for crypto, stablecoins, and tokenized assets.
10+ YOE10+ years engineering experience building advanced web automation and browser-internal systems; deep TypeScript/JavaScript expertise; backend experience (Golang/Node.js/Python); security fundamentals; distributed systems knowledge.
TypeScript, JavaScript, Golang, Node.js, Python, Chrome Manifest V3, iOS WKWebView, Android WebView, WebSockets, WebAuthn, Passkeys
1mo
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Cyber Researcher, Attack Emulation (Senior / Principal)
Denver or Golden or Colorado or Israel
$180k-$220k/yr RemoteFull Time
Pentera
Pentera: Automated security validation and penetration testing platform
5+ YOE5+ years in security research or penetration testing, strong Windows internals and networking, 3+ years Python development, experience with Metasploit/Impacket/Nmap/Burp, reverse engineering (IDA/Ghidra/WinDbg/Radare2), cloud (AWS/Azure), and applied AI/ML concepts.
Python, Metasploit, Impacket, Nmap, Burp, IDA, Ghidra, WinDbg, Radare2, AWS, Azure, Windows, Linux
2mo
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Director of Internal Audit, Technology
Denver, Colorado, United States
$149k-$182k/yr OnsiteFull Time
Zayo Group
Zayo Group: Provides high-capacity fiber networks and communications infrastructure.
10+ YOE10+ years IT/cybersecurity audit/risk/assurance; leadership experience; bachelor’s in Computer Engineering, Information Systems, or Computer Science.
Cloud platforms, IAM, Network security, Data protection, Audit methodology, Analytics, Automation
1mo
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Quality Engineer II
Centennial, Colorado, United States
$81k-$111k/yr OnsiteFull Time
Sierra Space
Sierra Space: Develops spacecraft and infrastructure for orbital and space transportation
2+ YOEBachelor's degree or equivalent, typically 2+ years related experience, basic RCCA/CAPA knowledge, internal audit training, ability to obtain and maintain U.S. security clearance; familiarity with GD&T, IPC, and NASA requirements preferred.
Geometric Dimensioning and Tolerancing (GD&T), IPC, NASA, ISO 9001, Failure Mode and Effects Analysis (FMEA), Statistical Process Control (SPC)