Lifecycle Systems Engineer

Consolidated Nuclear Security; Oak Ridge (TN); On-site; USD 90,000 - 120,000; Full time

Benefits offered by this job

Medical plan

Employer matched 401(k)

Onsite gym facilities

Onsite cafeterias

Job summary

Consolidated Nuclear Security is seeking an experienced Lifecycle Systems Engineer to apply rigorous systems engineering and requirements discipline on Y-12 project activities. You will work across concept, planning, design, execution, and operations, ensuring traceability and verification of requirements while leading cross-functional teams.

The role emphasizes MBSE, model-based analysis, and software tools (DOORS, Genesys, Cameo, and more) within a DOE/NNSA context.

Qualifications

• Bachelor of Science in Engineering/Physical Science from ABET-accredited program or equivalent, with GPA consideration.
• MS in Engineering/Physical Science or PhD in Engineering/Physical Science acceptable.
• Requires DOE Q clearance eligibility (per posting).
• Experience with lifecycle systems engineering and requirement traceability.

Responsibilities

• Serve as the Systems Engineering authority, implementing lifecycle practices per ISO-15288, ISO-29148, DOE 413.3-1, INCOSE.
• Support all project phases from concept to operations with lifecycle support.
• Lead cross-functional teams to implement a Requirements Management structure.
• Create and approve system and requirements documents and analyses.
• Use requirements management software to trace, analyze gaps, and verify closures.

Skills

Systems Engineering

Requirements Engineering

Lifecycle management

Cross-functional collaboration

Technical writing

Model-based systems engineering

MBSE tools

Analytical thinking

Education

ABET-accredited engineering degree

MS in Engineering/Physical Science

PhD in Engineering/Physical Science

Tools

DOORS

Genesys

Cameo

FlexSIM

ExtendSim

Model Center

Job description

Requisition ID19424-Posted08/17/2026-Engineering- Level of Experience (2) -Travel - 30% or less- Job Location Options (1)

What You'll 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 LSE's 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

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.

• 3.5 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.