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Lifecycle Systems Engineer

Consolidated Nuclear Security

Job Location:

Oak Ridge, TN - USA

Monthly Salary: Not provided by the employer

Posted: 27 May 2026 (30+ days ago)

Application Deadline: 26 October 2026

Vacancies: 1 Vacancy

Job Summary

Location: Oak Ridge TN
Job Title: Lifecycle Systems Engineer
Career Level From: Senior Associate
Career Level To: Senior Specialist
Job Specialty: Core Engineering

What Youll Do

The Lifecycle Systems Engineering (LSE) will implement Systems and Requirements Engineering principles for Y-12 site activities including production processes infrastructure projects and programmatic support to NSE and NNSA programs as follows:

Serve as the Systems Engineering technical authority implementing life cycle systems engineering practices as per ISO-15288 ISO-29148 DOE 413.3-1 and INCOSE for their assigned systems structures and projects.
Support all phases of systems engineering as required by the project/program from concept planning design execution integration testing and into operations with lifecycle support.
Lead and be a member of cross functional teams (CFT) with the fundamental role of implementing a Requirements Engineering Management structure as the CFT plans executes and verifies turnover readiness.
Facilitate the creation and approval of systems and requirements management deliverables such as Functional & Operational Requirement Documents System Requirement Documents Project Scoping Documents Analysis of Alternatives Operational Concepts and various others.
Use a requirement management software suite to trace and manage requirements provide requirements gap analyses at critical project milestones or stage gates and confirm closure of requirement verifications at project completion.
Provide Digital Engineering solutions using software tools when applicable based upon project size and complexity: Vitec Genesys and Cameo Model Based Systems Engineering IBM DOORS (Classic and Next Generation) Flex SIM Extend Sim modeling & simulation tools Model Center.
Select LSEs may support Digital Transformation activity with Y-12 and/or the NSE and developing procedures and guidance for various tools and departmental process.

What You Can Expect

Meaningful work and unique opportunities to support missions vital to national and global security
Top-notch dedicated colleagues
Generous pay and benefits with a stable organization
Career advancement and professional development programs
Work-life balance fostered through flexible work options and wellness initiatives

Minimum Job Requirements

Bachelor of Science in Engineering/Physical Science Chemistry Physics or related from an Engineering Accreditation Commission (EAC) Accreditation Board of Engineering and Technology (ABET) accredited program in the United States or designated equivalents from Canada or Mexico the Washington Accord or the list of substantially equivalent as documented by ABET AND 2 years of relevant experience. OR MS in Engineering /Physical science. OR PhD in Engineering /Physical science.
There is a minimum Grade Point Average (GPA) requirement up to 4 years post-graduation at time of offer and confirmed by transcript. Beyond four years from graduation engineering experience will supersede GPA as a requirement for hire.
- 3.0/4.0 minimum cumulative GPA for Bachelor degree
- 3.3 minimum cumulative GPA for Master degree
- 3.5 minimum cumulative GPA for PhD

Preferred Job Requirements

Internship or experience within an engineering manufacturing or similar technical environment.

Software / Technical Skills:

High level proficiency with Microsoft Office Suite especially Word and Excel and Adobe Acrobat.
Strong technical writing and editing skills.
DOORS electronic Requirements Management System
Genesys Cameo FlexSIM Extend Sim Model Based System Engineering

Interpersonal / Soft Skills:

Demonstrated initiative and ability to work independently and manage competing priorities.
Strong analytical ability and creative problem-solving skills.
Exceptional organizational and time-management skills with a high level of attention to detail.
Excellent written and verbal communication skills.
Collaborative adaptable team player with excellent accountability ownership interpersonal and communication skills.

Why Y-12

You get #morethanajob. We encourage employees to achieve a healthy personal balance among home work and the community. One of the ways we embrace work-life balance is by offering flexible work arrangements that provide alternatives to the traditional workweek while still meeting business needs. Top talent and personal commitment mean more to our success than any other factors so we reward our people with the kinds of benefits that make a positive difference in the quality of their lives. Benefits such as: medical plan prescription drug plan vision plan dental plan employer matched 401(k) savings plan disability coverage education reimbursement and many more. Want to stay healthy and fit but hate the cost of a gym membership Take advantage of one of our onsite workout facilities and eat healthy in our onsite cafeterias. Much more than a workplace at Y-12 you can build a career that lasts a lifetime.

Notes

The minimum education and experience for the lowest career level in the job posting range are listed under Minimum Job Requirements. Successful candidates hired into a higher career level than the minimum in the range must meet the requirements listed in the job leveling charts for the career level into which they are being hired.

If a range of Career Levels is posted i.e. Senior Associate to Senior Specialist internal applicants already in one of the Career Levels would come across at their current Career Level. Internal applicants currently in a lower level Career Level would move to the lowest posted Career Level.

Requires a Q clearance; however all qualified candidates will be considered regardless of their current clearance status. The ability to obtain and maintain a Department of Energy Q clearance is required.

This position may require entry into the Material Access Areas (MAA) and participation in the Human Reliability Program (10 C.F.R. Part 712) which requires successful competition of a DOE counterintelligence evaluation and may include a counterintelligence-scope polygraph examination.

This position may be categorized as a designated position identified by 10 C.F.R. Part 709 requiring successful completion of a DOE counterintelligence evaluation that may include a counterintelligence-scope polygraph examination.

CNS is a drug-free workplace. Candidates accepting a job offer will be required to pass a pre-placement physical drug screening and background investigation. As an employee you may be required to receive and maintain a security clearance from the United States Department of Energy in order to meet eligibility requirements for access to sensitive information or matter. U.S. citizenship is a requirement for security clearance applicants. All employees are subject to being randomly selected for drug testing without advance notification.

CNS is an equal opportunity employer. All qualified applicants will receive consideration for employment based on merit and without regard to race color religion sex sexual orientation national origin protected veteran status or disability.

Required Experience:

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