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Systems Security Engineer III

Sierra Nevada Corporation
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Lone Tree, CO, USA
Aug 08, 2026
The ISR (Intelligence, Surveillance & Reconnaissance), Aviation, and Security (IAS) business area is a leader in ISR and aviation, it is a leading prime manned and unmanned aircraft systems integrator for innovative, high-performance ISR and aviation systems. Its end-to-end Command, Control, Computers, Communications and Intelligence, Surveillance & Reconnaissance (C4ISR) capabilities encompass design, integration, test, certification, ground/flight training and complete logistics support. IAS tailors solutions to customer cost, performance, and schedule requirements and designs to consistently exceed expectations - with an unrivaled record of on time and on (or under) budget deliveries.

SNC has led thoughtful and disruptive change in the aerospace and defense industry for the past 60 years and now, we’re applying this tenacity and expertise to the U.S. Air Force’s (USAF) Survivable Airborne Operations Center (SAOC) mission. Join the SNC-led SAOC team and be a part of exciting and meaningful work to modernize and deliver the next-generation SAOC aircraft trusted by the President, Secretary of Defense and Chairs of the Joint Chiefs of Staff to ensure continued critical command, control and communication during national emergencies. If you’re passionate about building the airborne command post of the future, consider SNC for your next mission. Learn more about NC3 and SAOC here.

Are you looking for an opportunity to deepen your IT skills in a meaningful work environment that supports and protects explorers and heroes? Join our team! As a Systems Security Engineer III, you will play a pivotal role in ensuring the security of our IT infrastructure. You will lead the design, implementation, and maintenance of secure IT systems, and take charge of high-level incident response and digital forensics.

Responsibilities:

  • Lead the design and implementation of secure IT systems and networks.
  • Perform expert-level security monitoring and tuning.
  • Manage and lead complex incident response and digital forensics activities.
  • Conduct thorough risk and vulnerability assessments.
  • Develop, implement, and oversee security controls and protocols.
  • Research and integrate new security tools and technologies.
  • Document, analyze, and report on security breaches and their implications.
  • Mentor junior security engineers and contribute to their professional growth.

Qualifications You Must Have:

  • Bachelor's degree in Systems Security, Network Engineering, Information Technology, or related Engineering discipline
  • 5 years of experience in IT security or a related field.
  • Relevant experience can be considered as a substitute for the required educational qualifications. In the absence of a degree, a minimum of 9 years of related experience is required.
  • Higher level relevant degree may substitute for experience. 
  • Advanced understanding of cybersecurity principles and practices.
  • Experience with security frameworks and standards such as National Institute of Standards and Technology (NIST), ISO 27001.
  • Current/Active Top Secret U.S. Security Clearance with SCI Eligibility is required.

Qualifications We Prefer:

  • Information Systems Security Engineer Certified Authorization Professional (ISSE CAP) Certification.
  • Information System Security Officer (ISSO) Security , Certified Information Systems Auditor (CISA), or CompTIA Advanced Security Practitioner (CASP ) Certification.
  • Microsoft Certified Solutions Expert (MCSE), Linux, and/or Cisco Certified Network Professional (CCNP) Security Certification.
  • Experience with security tools such as firewalls, intrusion detection systems, and antivirus software.
  • Experience in the aerospace or defense industry.
  • Experience drafting, updating, and maintaining comprehensive organizational cybersecurity policies strictly aligned with NIST SP 800-53 Revision 4 and Revision 5 frameworks.
  • Hands-on experience utilizing ACAS for network scanning, vulnerability identification, and coordinated patch management.
  • Experience deploying, configuring, and managing the Elastic Stack (ELK) SIEM tool for real-time security monitoring, log analysis, and incident detection.

Essential Functions:

  • Ability to work primarily at a computer for extended periods.
  • Capability to participate in on-call rotation for incident response.
  • Must be able to lift up to 25 lbs occasionally.
  • Ability to work in an office or hybrid environment.
  • Occasional travel may be required.

This posting will be open for application for a minimum of 5 days and may be extended based on business needs.

Estimated Starting Salary Range: $108,496.89 - $149,183.22. Compensation varies depending on a wide array of factors, such as candidates' key skills, relevant work experience, and education/training/certifications. The disclosed range estimate may be adjusted for any applicable geographic differential associated with the location at which the position may be filled.

SNC offers a generous benefit package, including medical, dental, and vision plans, 401(k) with 150% match up to 6%, life insurance, 3 weeks paid time off, tuition reimbursement, and more.

IMPORTANT NOTICE:

This position requires current/active Top Secret with SCI eligibility U.S. Security Clearance. U.S. Citizenship status is required as this position needs an active U.S. Security Clearance for employment. Non-U.S. Citizens may not be eligible to obtain a security clearance. The Department of Defense Consolidated Adjudications Facility (DoD CAF), a federal government agency, handles the adjudicative aspects of the security clearance eligibility process for industry applicants. Adjudicative factors which affect the outcome of the eligibility determination include, but are not limited to, allegiance to the U.S., foreign influence, foreign preference, criminal conduct, security violations and illegal drug use.

Learn more about the background check process for Security Clearances.

SNC is a global leader in aerospace and national security committed to moving the American Dream forward. We’re known and respected for our mission and execution focus, agility, and disruptive and rapid innovation. We provide leading edge technologies and transformative solutions that support our nation’s most critical security needs. If you are mission-focused, thrive in collaborative environments, and want to make our country stronger with state-of-the-art technologies that safeguard freedom, join our team!

SNC is an Equal Opportunity Employer committed to an environment free of discrimination. Employment decisions are made based on merit without regard to race, color, age, religion, sex, national origin, disability, status as a protected veteran or other characteristics protected by law.

Job ID

R0030464

Security Clearance

TS/SCI
About Sierra Nevada Corporation

At SNC, we take an entrepreneurial approach to meeting our customers’ needs by developing innovative technological solutions in a rapid and agile production environment. For our employees, SNC strives to cultivate professional growth at every career stage. We believe in positive attitudes, sense of urgency, team-play, purpose, fire-in-the-belly passion, work-life balance, collaboration, humility, persistence, discipline and trust as accelerators of productivity and fulfillment.

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