Principal Engineer, Structural Integrity (High-Temp Nuclear)

53 Stations; Los Angeles (CA); On-site; USD 180,000 - 240,000; Full time

Job summary

Antares is seeking a Principal Engineer, Structural Integrity to build and own the structural integrity framework for high-temperature reactor components, including heat pipes. You will connect material behavior, testing, modeling, and code requirements, establishing a long-term technical foundation for Antares.

You will lead cross-functional collaboration with Materials, Mechanical Design, Safety Analysis, Licensing, Quality, and Operations, while advancing ASME Section III, Division 5

Qualifications

• Principal or Distinguished-level engineer with deep expertise in structural integrity, materials modeling, or high-temperature component design.
• Ability to establish technical methods and frameworks used across an organization.
• Strong understanding of metallic behavior under temperature, time, irradiation, and cyclic loading.
• Deep experience with creep, fatigue, creep-fatigue, fracture, crack growth, and nonlinear structural analysis.
• Significant experience with ASME Section III, preferably Division 5, and familiarity with Sec 11 practices.
• Experience taking material testing output and turning it into models, design curves, allowables, or engineering acceptance criteria.
• Strong finite-element and constitutive modeling background.
• Ability to work across materials testing, modeling, design, safety, licensing, quality, and operations.
• Advanced reactor or other high-temperature nuclear experience.

Responsibilities

• Build and own the Antares structural integrity framework covering design, qualification, operation, inspection, aging, and fitness for service.
• Serve as the technical authority for structural integrity and materials modeling across Antares.
• Lead application of equivalency applicable ASME Section III, Division 5 for high-temperature components.
• Bring relevant R5 and R6 methods into the Antares framework for high-temperature life assessment, fracture, defect tolerance, and remaining life.
• Translate material test data into qualified material models, design properties, allowables, and acceptance criteria used in structural analysis.
• Develop and qualify methods for creep, fatigue, creep-fatigue, ratcheting, thermal aging, irradiation effects, fracture, and crack growth.
• Define the material testing and irradiation data needed to support current design decisions and longer-term qualification.
• Connect material behavior and test results directly to design margins, inspection requirements, and allowable operating life.
• Establish methods for evaluating manufacturing defects, inspection findings, degradation, and fitness for continued service.
• Support aging management, surveillance, remaining-life assessment, and asset-management strategies.
• Own the technical basis, verification, validation, uncertainty, and qualification approach for structural and materials modeling methods.
• Guide and mentor engineers across materials and structural analysis and help set the long-term technical direction for the capability.

Skills

Structural integrity

Materials modeling

High-temperature design

ASME III Div5

Finite element

Uncertainty analysis

Cross-functional leadership

Job description

Antares is seeking a Principal Engineer, Structural Integrity to build and own the structural integrity framework for high-temperature reactor components, including heat pipes. You will connect material behavior, testing, modeling, and code requirements, establishing a long-term technical foundation for Antares.

You will lead cross-functional collaboration with Materials, Mechanical Design, Safety Analysis, Licensing, Quality, and Operations, while advancing ASME Section III, Division 5