Sr. Systems Security Cyber Engineer - Contingent (Onsite - Aurora, CO) TS/SCI required

Collins Aerospace; Aurora (CO); On-site; USD 87,000 - 165,000; Full time

Benefits offered by this job

Medical, dental, and vision insurance

Three weeks of vacation

Generous 401(k) plan with employer U.S

Tuition reimbursement

Student Loan Repayment Program

Job summary

Collins Aerospace seeks a Senior Systems Security Engineer to lead cybersecurity efforts within the Product Cybersecurity Organization. The role requires an active TS/SCI clearance and will be onsite in Aurora, CO, with travel up to 25%.

Responsibilities include RMF/STIG implementation, ATO validation, and security design across DoD/ civilian programs. You will work with engineering teams to harden systems and ensure compliance with DoD/NIST standards.

Qualifications

• Degree in STEM with 5+ years of related experience, or advanced degree with 3+ years.
• Active TS/SCI clearance required for start date.
• U.S. citizenship required for security clearance eligibility.
• DoD 8140.03 compliant certification is required (e.g., Security+, CISSP).
• Experience with RMF and STIG per NIST SP 800-37 and DoD 8510.01.

Responsibilities

• Support RMF documents and controls validation testing for ATOs.
• Review proposed system changes to maintain security posture.
• Implement security improvements by assessing current situation and trends.
• Support cybersecurity requirements, design artifacts, plans and policies.
• Analyze collected cybersecurity data and test results.
• Provide on-site security engineering, systems administration, and cybersecurity support.
• Collaborate with software/engineering teams to enforce cyber policies.
• Travel CONUS/OCONUS up to 25%.

Skills

Linux commands

Vulnerability scanning tools

RMF/STIG knowledge

DoD 8140.03 certification

Security engineering experience

Education

STEM degree

Advanced degree in related field

Tools

Tenable Security Center

STIG Viewer

SCAP Compliance Checker

Job description

Location: US-CO-AURORA-S76 ~ 16430 E Hughes Dr ~ BLDG S76

Date Posted: 2026-10-09

Country: United States of America

Location: US-CO-AURORA-S76 ~ 16430 E Hughes Dr ~ BLDG S76

Position Role Type: Onsite

U.S. Citizen, U.S. Person, or Immigration Status Requirements: Active and transferable U.S. government issued security clearance is required prior to start date. U.S. citizenship is required, as only U.S. citizens are eligible for a security clearance

Security Clearance Type: TS/SCI - Current

Security Clearance Status: Active and existing security clearance required on day 1

THIS ROLE IS CONTINGENT: Employment is based on contract award and customer funding.

Raytheon Company, Managed By Collins Aerospace
At RTX, the world's largest aerospace and defense company, 185,000 great minds are united by purpose and inspired to make a difference solving the world’s most complex problems. With our three market leading businesses, world-class operations and investments in research and development, we offer capabilities and opportunity no one else can. Together, we push the boundaries of known science and find new ways to connect and protect our world.
Collins Aerospace is a leader in technologically advanced, intelligent solutions that help redefine the aerospace and defense industry. With a comprehensive portfolio and deep technical expertise, we help customers meet the demands of the global market. Join us and help shape the future of aerospace and defense.
Join our highly visible team and perform technically challenging assignments, which will closely contribute to protecting our nation and our products. We are seeking a Senior Systems Security (Cybersecurity) Engineer to function as a key contributor for the Product Cybersecurity Organization (PCO) team.

This role will be worked onsite in Aurora, CO and requires an active TS/SCI clearance. Relocation assistance is not available.

What You Will Do:

• Support the development of RMF documents and controls validation testing for Authorizations to Operate (ATOs)
• Ensure proposed system changes are reviewed and implemented to ensure that system modifications do not adversely affect the security of the system
• Implement security improvements by assessing the current situation; evaluating trends; and anticipating requirements
• Support the development of cybersecurity requirements, design and architecture artifacts, plans, and policies
• Analyze collected cybersecurity data and test results
• Have hands-on technical duties and will provide on-site security engineering, systems administration, and cybersecurity support to the program
• Work with the Software Engineering and/or System Engineering teams to implement cybersecurity policies, harden the system, and document findings
• CONUS/OCONUS travel (up to 25%)

What You Will Learn:

• You will enhance your leadership capabilities and systems security engineering expertise, gaining specialized skills that will differentiate you in the industry
• You will develop deep technical expertise to become a cybersecurity subject matter expert (SME), while gaining valuable exposure to multiple business models and product lines in a dynamic, ever-evolving field. We are growing and so can you!

Qualifications You Must Have:

• Typically requires a degree in Science, Technology, Engineering or Mathematics (STEM) and minimum 5 years prior relevant experience or an Advanced Degree in a related field and minimum 3 years of experience
• U.S. citizenship is required, as only U.S. citizens are eligible for a security clearance
• Active and transferable TS/SCI U.S. government issued security clearance is required prior to start date
• DoDM 8140.03 compliant certification (e.g., Security+, CISSP, or equivalent)
• Experience in Security Technical Implementation Guidance (STIG) and Risk Management Framework (RMF) as described in NIST Special Publication 800-37 and DoD Instruction 8510.01
• Experience with Systems Security Engineering requirements, specifications, and practice implementing DoD and Federal Assessment and Authorization (A&A) Processes and cybersecurity controls and developing and maintaining associated A&A documentation.
• Experience with Linux Commands
• Experience with utilizing vulnerability scanning tools to include Tenable Security Center, STIG Viewer, SCAP Compliance Checker/Tools

Qualifications We Prefer:

• Experience working on U.S. Government contract proposals as a Cybersecurity Engineering subject matter experienced professional
• Familiar with cloud and/or virtualization technologies
• Familiar with Containerization (e.g., Docker/Kubernetes)
• Familiar with Cross Domain Solutions (CDS)
• Experience with IT, network, and system security administration, including security configuration and account management best practices for Windows, UNIX, Red Hat Enterprise Linux, and Cisco Systems
• Experience utilizing information security toolsets, including anti-virus, vulnerability assessment, HIDS/NIDS, host-based and endpoint security, Multi-Factor Authentication (MFA), Security Information and Event Management (SIEM), and centralized auditing resources
• Previous experience with Program Protection Plans (PPP), DoDI 5000.02, and DoDI 5200.39
• Experience with implementing highly technical solutions and reporting their importance to program managers and stakeholders
• Written and verbal communications skills, with the ability to work independently

What We Offer:

Some of our competitive benefits package includes:

• Medical, dental, and vision insurance
• Three weeks of vacation for newly hired employees
• Generous 401(k) plan that includes employer matching funds and separate employer retirement contribution, including a Lifetime Income Strategy option
• Tuition reimbursement program
• Student Loan Repayment Program
• Life insurance and disability coverage
• Optional coverages you can buy pet insurance, home and auto insurance, additional life and accident insurance,critical illnessinsurance, group legal, ID theft protection
• Birth, adoption, parental leave benefits
• Carrot Health, fertility, and family planning
• Adoption Assistance
• Autism Benefit
• Employee Assistance Plan, including up to 10 free counseling sessions
• Healthy You Incentives, wellness rewards program
• Doctor on Demand, virtual doctor visits
• Bright Horizons, child and elder care services
• Teladoc Medical Experts, second opinion program
• And more!

• Please ensure the role type (defined below) is appropriate for your needs before applying to this role. This position is classified as:

Onsite: Employees who are working in Onsite roles will work primarily onsite. This includes all production and maintenance employees, as they are essential to the development of our products.

As part of our commitment to maintaining a secure hiring process, candidates may be asked to attend select steps of the interview process in-person at one of our office locations, regardless of whether the role is designated as on-site, hybrid or remote.

The salary range for this role is 86,800 USD - 165,200 USD. The salary range provided is a good faith estimate representative of all experience levels. RTX considers several factors when extending an offer, including but not limited to, the role, function and associated responsibilities, a candidate’s work experience, location, education/training, and key skills.

Hired applicants may be eligible for benefits, including but not limited to, medical, dental, vision, life insurance, short-term disability, long-term disability, 401(k) match, flexible spending accounts, flexible work schedules, employee assistance program, Employee Scholar Program, parental leave, paid time off, and holidays. Specific benefits are dependent upon the specific business unit as well as whether or not the position is covered by a collective-bargaining agreement.

Hired applicants may be eligible for annual short-term and/or long-term incentive compensation programs depending on the level of the position and whether or not it is covered by a collective-bargaining agreement. Payments under these annual programs are not guaranteed and are dependent upon a variety of factors including, but not limited to, individual performance, business unit performance, and/or the company’s performance.

This role is a U.S.-based role. If the successful candidate resides in a U.S. territory, the appropriate pay structure and benefits will apply.

RTX anticipates the application window closing approximately 40 days from the date the notice was posted. However, factors such as candidate flow and business necessity may require RTX to shorten or extend the application window.

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