Job Information
System One Senior Nuclear Mechanical / Structural Engineer (Reactor Analysis ) in Cranberry Township, Pennsylvania
Job Title: Senior Nuclear Mechanical / Structural Engineer (Reactor Analysis )
3 positions
Location: Cranberry Township , Pennsylvania
Contractor Work Model: Onsite
Length of the assignments: 6 months to 2 years
Start date: May 2026 LOCAL CANDIDATE PREFERRED
Work schedule: 4 days in office the first 2 weeks, 3 days the next 6 weeks and then 2 days a week after that . That is for typical week, can be a bit different based on specific demand.
Job Description: Senior Nuclear Mechanical / Structural Analysis Engineer (Reactor Internals)
Position Summary
The Senior Nuclear Mechanical/Structural Analysis Engineer is responsible for performing advanced structural, thermal, and seismic analyses in support of nuclear reactor components—particularly Reactor Vessel Internals (RVI). This role requires deep expertise in ASME Section III design, nonlinear finite element analysis, and engineering evaluation of safety related structures. The engineer will support design, qualification, configuration management, and lifecycle assessment of reactor internals and related components.
Key Responsibilities
Structural & Mechanical Analysis
Perform linear and nonlinear Finite Element Analysis (FEA) using ANSYS Mechanical, including contact modeling, plasticity, creep, buckling, and fracture evaluation.
Conduct seismic analysis (response spectrum, time-history) and flow-induced vibration (FIV) assessments for nuclear components.
Evaluate stresses, strains, deflections, and fatigue in accordance with ASME Section III, Subsections NB/NG.
Prepare analysis reports that document methodology, assumptions, calculations, results, and compliance with regulatory requirements.
Nuclear Component Design & Qualification
Support design, modification, and qualification of Reactor Vessel Internals (core support structures, lower/upper internals, baffle-former assemblies, hold-down springs, fuel alignment components).
Provide engineering review for safety related components to ensure conformance with licensing bases, materials requirements, and environmental conditions.
Drawing Review & Technical Documentation
Perform engineering review and verification of drawings to ensure dimensional accuracy, tolerancing [Geometric Dimensioning and Tolerancing (GD&T)], and technical compliance.
Provide redlines, engineering dispositions, and design change packages as required.
Support configuration management and document control processes.
Regulatory & Code Compliance
Apply ASME Section III rules, NRC guidance, industry codes (ASME BPVC, RCC?M, etc.), and utility specifications to all work.
Participate in design reviews, safety evaluations, and audits.
Cross Functional Support
Work with manufacturing, procurement, and field service teams to resolve technical issues related to fabrication, installation, inspection, or degradation of reactor internals.
Provide subject matter expertise for outage support, emergent issue resolution, and root-cause evaluations as needed.
Required Qualifications
Bachelor’s degree in Mechanical Engineering (Master’s preferred).
7+ years experience in nuclear mechanical or structural analysis.
Proficiency in ANSYS Mechanical (linear, nonlinear, contact modeling, thermal-stress, modal, seismic).
Deep knowledge of ASME Section III, including NB/NG component rules.
Experience with Reactor Vessel Internals, core support structures, or other Class 1 nuclear components.
Strong understanding of GD&T, drawing standards, and manufacturing tolerances.
Ability to write clear, defensible analysis reports suitable for regulatory scrutiny.
Preferred Qualifications
Experience with FIV or thermal hydraulic coupling.
Experience with aging management, fatigue evaluations, or bolting integrity for reactor internals.
Familiarity with industry databases such as EPRI materials handbooks.
Prior experience at Westinghouse, Framatome, GEH, or a major utility engineering group.
Professional Engineer (PE) license or eligibility.
US citizen or ability to meet nuclear access requirements (as applicable).
Key Competencies
Strong analytical and problem? solving skills
Effective technical communication
Attention to detail in calculations and document review
Ability to manage multiple projects
Collaboration across disciplines (design, manufacturing, field services)
S ystem One, and its subsidiaries including Joulé, ALTA IT Services, and Mountain Ltd., are leaders in delivering outsourced services and workforce solutions across North America. We help clients get work done more efficiently and economically, without compromising quality. System One not only serves as a valued partner for our clients, but we offer eligible employees health and welfare benefits coverage options including medical, dental, vision, spending accounts, life insurance, voluntary plans, as well as participation in a 401(k) plan.
System One is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex (including pregnancy, childbirth, or related medical conditions), sexual orientation, gender identity, age, national origin, disability, family care or medical leave status, genetic information, veteran status, marital status, or any other characteristic protected by applicable federal, state, or local law.
#LI-TC1
Ref: #180-Eng Madison
System One, and its subsidiaries including Joulé, ALTA IT Services, CM Access, TPGS, and MOUNTAIN, LTD., are leaders in delivering workforce solutions and integrated services across North America. We help clients get work done more efficiently and economically, without compromising quality. System One not only serves as a valued partner for our clients, but we offer eligible full-time employees health and welfare benefits coverage options including medical, dental, vision, spending accounts, life insurance, voluntary plans, as well as participation in a 401(k) plan.
System One is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex (including pregnancy, childbirth, or related medical conditions), sexual orientation, gender identity, age, national origin, disability, family care or medical leave status, genetic information, veteran status, marital status, or any other characteristic protected by applicable federal, state, or local law.