Senior Structural Integrity Engineer, High-Temp Metals

53 Stations; Los Angeles (CA); On-site; USD 180,000 - 260,000; Full time

Job summary

Antares is seeking a Principal Engineer, Structural Integrity to build and own our methods for high-temperature reactor components, including heat pipes, connecting material behavior, testing, modelling, and code requirements. The role will collaborate across Materials, Mechanical Design and Analysis, Safety Analysis, Licensing, Quality, and Operations to establish a durable technical foundation for Antares.

Mentoring engineers and advancing ASME-aligned frameworks are key aspects.

Qualifications

• Principal or Distinguished-level engineer with deep expertise in structural integrity, materials modeling, or high-temperature component design.
• Demonstrated 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. Additionally, exposure to Sec 11 rules/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.
• Strong understanding of verification, validation, uncertainty, and qualification of engineering methods.
• Ability to make and defend engineering judgments where data are incomplete and establish a credible path to closure.
• 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 Div 5

Finite-element

Uncertainty analysis

Engineering judgment

Cross-functional collaboration

Job description

Antares is seeking a Principal Engineer, Structural Integrity to build and own our methods for high-temperature reactor components, including heat pipes, connecting material behavior, testing, modelling, and code requirements. The role will collaborate across Materials, Mechanical Design and Analysis, Safety Analysis, Licensing, Quality, and Operations to establish a durable technical foundation for Antares.

Mentoring engineers and advancing ASME-aligned frameworks are key aspects.