Jobs in the United States

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Added 1 min ago
Sr. Systems Security Engineer (Onsite - Richardson, TX) TS/SCI clearance required
RTX
United States
We are seeking a highly skilled Senior Systems Security Engineer to support programs involving Cross-Domain Solutions (CDS) and Site-Based Security Assessments (SBSA) that supports the…
Added 1 min ago
RF Design Engineer II
RTX
United States
…design and test activities that span preliminary design to integration. Products we develop support radar and datalink applications on a variety of tactical missile programs. Critical to…
Added 1 min ago
Power Electronics Engineer I - Onsite
RTX
United States
We are seeking an enthusiastic Power Electronics Engineer (P1) to join our multidisciplinary engineering team supporting advanced aerospace and defense programs. The P1 engineer will assist…
Added 1 min ago
Senior Software Engineer (Embedded SW)
RTX
United States
…experience/interest in the development of solutions to radar system. The work is highly technical, and the individual will work collaboratively in an agile environment on the software team.…
Added 2 mins ago
Boomi Engineer - Senior Consultant
Argano
Remote, United States
We are seeking a skilled Boomi Integration Developer with strong experience in designing, developing, and managing integrations between enterprise applications. The ideal candidate should…
Added 2 mins ago
ADAS Design & Release Engineer
Ford
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Added 3 mins ago
Controller
Texas A&M Engineering
Bryan, TX
Coordinate financial system integration with applicable Texas A&M University System financial processes and INSPIRE Alliance operations.
Added 4 mins ago
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Senior Information System Security Engineer (ISSE)
Amentum
Crane, IN
- $100,000 to $150,000 USD / year
Amentum is seeking a Senior Information System Security Engineer (ISSE) to support Program Offices within Department of War Strategic Systems Programs (SSP). The ISSE will support…
Added 5 mins ago
Electrical Engineer II – Electronic Design, Prototyping, and Lab Characterization
RTX
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Added 5 mins ago
Electrical Production Support REA Engineer I - Onsite
RTX
United States
…Electronics Team in Huntsville, AL. This role supports missile integration and test for the Standard Missile program, troubleshooting electromechanical hardware at system, subsystem, and…
Added 5 mins ago
F135 Engine Core Upgrade (ECU) Propulsion Systems Analysis Engineering Intern (Summer 2027) (Onsite)
RTX
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Within the F135 ECU Program, Engine Design & Systems Integration (ED&SI) is a dynamic engineering organization focused on the development and certification of military, commercial, and…
Added 5 mins ago
Principal Mechanical Design Engineer
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United States
Perform Design for Manufacturability Trade Studies to optimize fabrication / integration cost reductions.
Added 5 mins ago
Principal RF Design Engineer
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…design and test activities that span preliminary design to integration. Products we develop support radar and datalink applications on a variety of tactical missile programs. Critical to…
Added 5 mins ago
Information Systems Engineer
RTX
United States
Experience supporting system integration, configuration management, test validation, or technical evaluation of computing systems.
Added 5 mins ago
Senior Systems Integration and Test Engineer
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United States
Perform integration, verification, and testing of Effector systems to ensure the system under test performs according to specifications and/or requirements.
Added 5 mins ago
Senior Principal RF Design Engineer
RTX
United States
…design and test activities that span preliminary design to integration. Products we develop support radar and datalink applications on a variety of tactical missile programs. Critical to…
Added 7 mins ago
Senior Flight Test Engineer
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Bedford / Hanscom AFB, MA
Strong background in integrated aircraft testing, including software and hardware upgrades, system integration, verification, validation, and performance evaluation.
Added 7 mins ago
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Software Engineer
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- $72,800 to $130,000 USD / year
As a Software Engineer within our OI Provider DevOps Enablement - Revenue Cycle Automation team, you will play a crucial role in modernizing and simplifying healthcare operations through…
Added 9 mins ago
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1792 - Software Engineer
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Norfolk, VA
- $150,000 to $170,000 USD / year
Sigma Defense is seeking a Software Engineer to join our team in Norfolk, VA. The hired candidate will support engineering, development, integration, and modernization activities. This…
Added 9 mins ago
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Senior Electrical Engineer
SSOE, Inc.
Remote, United States
- $110,000 to $160,000 USD / year
The chips that run modern life are made in some of the most complex facilities on earth. As a Senior Electrical Engineer in SSOE's Tool Install division, you'll lead the electrical design…
Added 10 mins ago
SI
Senior Electrical Engineer
SSOE, Inc.
Remote, United States
- $110,000 to $160,000 USD / year
The chips that run modern life are made in some of the most complex facilities on earth. As a Senior Electrical Engineer in SSOE's Tool Install division, you'll lead the electrical design…
Added 12 mins ago
Unity Software Engineer I - Internal Tools
Axon
Seattle, WA · WA
…toward owning complete features. This role is ideal for an engineer who is curious about developer productivity, build and test infrastructure, and enabling cross functional teams to ship…
Added 13 mins ago
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Software Engineer
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Eden Prairie, MN
- $72,800 to $130,000 USD / year
The Software Engineer - AI & Security Technology is responsible for designing, developing, implementing, and supporting technology solutions that enable and enhance Physical Corporate…
Added 14 mins ago
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Firmware Engineer
HP
Vancouver, WA
- $105,050 to $161,800 USD / year
Implement coding, programming, and integration activities based on product objectives and overall system architecture.
Added 15 mins ago
Software Development Engineer II, Amazon Leo
Amazon Kuiper Manufacturing Enterprises LLC
Redmond, WA
…Provider (ISP) customers, and we need a Software Development Engineer II. You will build the backend-for-frontend layer, the service that sits directly behind the customer-facing surfaces…

Antares

Senior Structures Engineer

Los Angeles, CA, United States

$145,000 to $190,000 USD / year

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Job details

Pay: $145,000 to $190,000 USD / year
Experience: 5+ years of professional experience designing, analyzing, and developing structural systems for demanding engineering applications.
Posting language: English
Posted: Oct 29, 2026

Original job description

About Us

At Antares, our long-term mission is to make clean energy abundant from Earth to the Asteroid Belt. We’re fueled by the belief that advanced nuclear energy can strengthen our military, solve the climate crisis, elevate global living standards, and expand humanity's presence in outer space. To achieve our mission, we’re building mass-producible, inherently safe, deployable microreactors that can be used terrestrially, underwater, and in space.

The Antares team hails from SpaceX, the White House, the Pentagon, the Department of Energy, MIT, Rigetti Computing, General Atomics, Relativity Space, Ursa Major, and National Laboratories like Idaho, Oak Ridge, Los Alamos, and Savannah River. Antares has raised over $600M in venture capital from top-tier investors and has hundreds of million-dollars on contract with the military services, NASA, and the Department of Energy.

About the Role

As a Senior Structures Engineer, you'll lead the design, analysis, and development of critical reactor structures, including the core restraint mechanism, control drum support and mounting systems, primary heat exchanger vessel supports, and other safety-significant structural components. You will ensure these systems meet structural, thermal, and functional performance requirements throughout development, testing, and operation. You will work closely with cross-functional teams to develop first-of-a-kind hardware in a highly constrained, multidisciplinary design environment while supporting prototype fabrication, testing, qualification, and deployment.

The ideal candidate has extensive experience designing complex structural systems in regulated industries and is passionate about solving challenging engineering problems from concept through hardware realization.

Roles and Responsibilities:

Perform thermal, mechanical, and structural analyses to support the sizing, layout, and optimization of reactor structural components, including the core restraint system, control drum mounting, primary heat exchanger (PHX) vessel supports, and other structural systems as required.
Define system architecture, operating limits, design margins, and concepts of operation (CONOPS) to ensure reliable performance across all operating conditions.
Develop engineering documentation, including calculations, specifications, interface definitions, design reports, and technical justifications to support design reviews, verification, and licensing activities.
Lead the design, fabrication, and execution of component- and system-level testing by developing test articles, test fixtures, instrumentation plans, and validation procedures to demonstrate performance, durability, and life-cycle reliability.
Collaborate cross-functionally with reactor, thermal, manufacturing, licensing and procurement teams to ensure successful integration of structural systems into the overall reactor design.
Support supplier selection, technical evaluations, design reviews, and the resolution of manufacturing, assembly, and installation issues.
Present technical work at internal and external design reviews and provide technical leadership throughout the design, analysis, testing, qualification, and deployment lifecycle.

Basic Qualifications:

Bachelor's degree in Mechanical Engineering, Aerospace Engineering, Nuclear Engineering, or a related engineering discipline.
5+ years of professional experience designing, analyzing, and developing structural systems for demanding engineering applications.
Experience in structural design, including hand calculations, material selection, bolted and welded joint design, load path development, and thermo-mechanical trade studies.
Experience using finite element analysis (FEA) tools to evaluate structural performance, stress, deformation, fatigue, and thermal loading.
Knowledge of structural design principles, materials, bolted and welded joints, and load path development.
Demonstrated ability to work effectively on multidisciplinary engineering teams and communicate technical concepts to a broad range of technical and non-technical stakeholders.

Preferred Skills & Experience:

Master's degree or higher in Mechanical Engineering, Aerospace Engineering, Civil Engineering, Nuclear Engineering, or a related engineering discipline.
Demonstrated expertise in structural design, including hand calculations, material selection, bolted and welded joint design, load path development, and thermo-mechanical trade studies.
Proficiency with structural analysis and simulation tools such as ANSYS Mechanical, Abaqus, Nastran, or equivalent finite element analysis (FEA) software.
Strong understanding of material behavior and structural design considerations, including thermal stresses, creep, fatigue, fracture, buckling, corrosion, and high-temperature material performance.
Experience designing hardware in accordance with ASME Boiler & Pressure Vessel Code, AISC, ACI, AWS, NASA, or other applicable structural and mechanical design standards.
Experience serving as a Technical Lead or Responsible Engineer, leading multidisciplinary engineering efforts from concept development through design, testing, qualification, and hardware deployment.
Experience developing first-of-a-kind hardware in highly regulated industries such as nuclear, aerospace, defense, energy, or other safety-critical applications.

Salary Range:

Senior Structures Engineer - $145,000 - $190,000

Additional Requirements:

Ability to work long hours and weekends as necessary to support critical milestones.

Culture

At Antares, we like to specifically tie each role to our founding document’s set of values–here are the top five cultural values we think you should believe at your core to be successful:

Think in Systems - Energy and Defense are complex ecosystems with numerous stakeholders with competing priorities, conflicting policies, perverse incentives, and emergent and path-dependent properties. First principles thinking alone is insufficient. Think probabilistically and then take action. “If you want to be certain, then you are apt to be obsolete.” Over-optimizing the components often degrades the system
Obsess over the End User - The customer and end user are often not the same. We will never build globally competitive commercial products if we lose sight of our end users and their entire interaction with the product life cycle
Be Unconstrained by Convention - Our only limits are the laws of physics. Many, even experts, will say what we are working on is impossible. They said the same about SpaceX reusing rockets. Generationally impactful companies, by definition, must accomplish the seemingly impossible. If it were easy, it would have already been done. Never shy away from a solution because it has never been tried before, and never choose to do something because that's “how it's always been done”
Go Where the Work Is - Never miss a chance to meet a customer, user, or stakeholder face to face, even if that means hopping on a plane. If you can’t make it, find a teammate who can channel your intentions and go in your place. Deep work can be done from anywhere, but we believe teams are built in person, and aim to maximize our time together
Operate in the Grey - Embrace nuance in pursuit of truth. Question every fundamental assumption

Equal Opportunity

Antares is an Equal Opportunity Employer. Employment decisions are based solely on merit, competence, and qualifications, without regard to race, color, religion, gender, national origin/ethnicity, veteran status, disability status, age, sexual orientation, gender identity, marital status, mental or physical disability, or any other legally protected status.

ITAR REQUIREMENTS

To conform to U.S. Government export regulations, applicant must be a (i) U.S. citizen or national, (ii) U.S. lawful, permanent resident (aka green card holder), (iii) Refugee under 8 U.S.C. § 1157, or (iv) Asylee under 8 U.S.C. § 1158, or be eligible to obtain the required authorizations from the U.S. Department of State. Learn more about the ITAR here https://www.pmddtc.state.gov/?id=ddtc_kb_article_page&sys_id=24d528fddbfc930044f9ff621f961987.

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