Jobs in the United States

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Added 1 day ago
Principal/Sr. Principal RF Microwave Design Engineer (Level 3 or 4)
SP - Space Components
United States
…precision weapons, armament systems, and advanced aerospace structures. Our facility in Goleta, CA specializes in deployable systems for spacecraft such as solar arrays, instrument booms,…
Added 1 day ago
Principal/Sr. Principal RF Microwave Design Engineer (Level 3 or 4)
Northrop Grumman
Goleta
…precision weapons, armament systems, and advanced aerospace structures. Our facility in Goleta, CA specializes in deployable systems for spacecraft such as solar arrays, instrument booms,…
Added 1 day ago
BR
Senior Development Test Engineer
Beyond Reach Labs
Brooklyn, NY
- $120,000 to $160,000 USD / year
At Beyond Reach Labs, we are designing and building the largest deployable structures ever flown to space. As an engineering-driven organization, you will be at the forefront of the…
Added 2 days ago
BR
Senior Mechanical Engineer
Beyond Reach Labs
Brooklyn, NY
- $120,000 to $160,000 USD / year
…reliable, and easier to manufacture. As a Senior Mechanical Engineer, you will be responsible for designing, analyzing, and validating mechanical systems and actuators for our deployable…
Added 2 days ago
C
Senior Mechanical Engineer
Clera
Detroit, MI
- $165,000 to $210,000 USD / year
Own major mechanical subsystems for ruggedized, field-deployable directed-energy systems, from architecture through production handoff. You will work on a lean engineering team to help…
Added 2 days ago
WS
Applications Engineer II
Wilder Systems
OKC, OK
- $85,000 to $110,000 USD / year
…customers who run them: turning customer requirements into deployable applications, proving them out on real hardware, and carrying them through training and feedback in the field. You'll…
Added 2 days ago
Principal/Sr. Principal Mechanical Engineer
Northrop Grumman
Goleta
As a Principal/Sr. Principal Mechanical Engineer in Goleta, CA you will be responsible for creating and implementing deployable structures and mechanical mechanisms at the cutting edge of…
Added 2 days ago
Principal/Sr. Principal Mechanical Engineer
SP - Space Components
United States
As a Principal/Sr. Principal Mechanical Engineer in Goleta, CA you will be responsible for creating and implementing deployable structures and mechanical mechanisms at the cutting edge of…
Added 2 days ago
Software Engineer
V2X
Colorado Springs, CO
Collaborate with systems, network, hardware, integration, test, and operations personnel to ensure software is deployable, supportable, and compatible with the approved system baseline.
Added 3 days ago
A
Senior-Staff Enterprise Software Engineer
Antares
Los Angeles, CA
- $160,000 to $235,000 USD / year
…our mission, we’re building mass-producible, inherently safe, deployable microreactors that can be used terrestrially, underwater, and in…
Added 3 days ago
A
Thermo-Mechanical Engineer, Heat Exchanger
Antares
Los Angeles, CA
- $145,000 to $190,000 USD / year
…our mission, we’re building mass-producible, inherently safe, deployable microreactors that can be used terrestrially, underwater, and in…
Added 3 days ago
A
Senior Structures Engineer
Antares
Los Angeles, CA
- $145,000 to $190,000 USD / year
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…
Added 5 days ago
Q
Advanced Mechanical Design Engineer - Cryo, Optical, Vacuum Systems - 1088
Quantinuum
US Broomfield, CO
- $130,000 to $165,000 USD / year
We are seeking an Advanced Mechanical Design Engineer – Cryo, Optical, Vacuum Systems in our Broomfield, CO location to help design and de-risk next-generation trapped-ion quantum computing…
Added 9 days ago
A
Senior Mechanical Design Engineer - Space
Antares
Los Angeles, CA
- $145,000 to $190,000 USD / year
As a Mechanical Design Engineer in the Mission Engineering team, you will primarily own hardware associated with nuclear power systems in space and on the surface of the Moon and Mars. As…
Added 10 days ago
E
Senior Structural Dynamics Analyst, Deployable Antenna Structures
E-Space
Arlington, TX
- $140,000 to $210,000 USD / year
…and damage tolerance, or detail stress of airframe or ground structures, this is not the right fit. If you have spent your career on modes, frequency response, and making a model agree with…
Added 10 days ago
E
Mechanical Test Engineer, Deployable Antenna Structures
E-Space
Arlington, TX
- $140,000 to $210,000 USD / year
We are looking for a hands-on Mechanical Test Engineer to own ground testing of the physical unfolding of E-Space’s large deployable antenna structure. You will work with deployable…
Added 11 days ago
Staff Mechanical Engineer, Research and Development
Lunar Outpost
Golden, CO
Design parts and assemblies – including vehicle structures, electronics packaging, mechanisms and deployable structures – applying best practices in CAD for parts and assemblies to ensure…
Added 11 days ago
Mechanical Engineer / Counter-UAS
ATSC IES INC
Gilbert, AZ
Design and develop mechanical components and assemblies for C-UAS platforms, including sensor housings, effectors, mounting systems, and deployable structures
Added 11 days ago
A
Mechanical Design Engineer I/II - Space
Antares
Los Angeles, CA
- $90,000 to $150,000 USD / year
…our mission, we’re building mass-producible, inherently safe, deployable microreactors that can be used terrestrially, underwater, and in…
Added 12 days ago
Software Engineer GEN AI, Assistant Vice President
Citigroup
Irving, TX
…delivery lifecycle, from product analysis through to reviewed, deployable…
Added 12 days ago
Sr Specialist, Thermal Analyst Mechanical Engineer (Space Systems) : Sign-on bonus ($20K max)
L3Harris Technologies
Wilmington, MA
…overall system design including thermal design, analysis, and test of optical systems operating in harsh space and ground environments. Senior Specialist engineers possess understanding of…
Added 12 days ago
Staff Software Engineer, AI/ML Quality, Shopping Agent, Cloud Applied AI
Google
Sunnyvale, CA · Kirkland, WA
8 years of experience with data structures and algorithms.
Added 13 days ago
SA
Staff Engineer, Actuated Systems - Ranger (R6347)
Shield AI
Seattle, WA
- $170,000 to $250,000 USD / year
As a Staff (L4) Actuated Systems Engineer, you will take hands-on technical ownership of the mechanical design, layout, and integration of actuation systems for flight control surfaces, bay…
Added 13 days ago
Spacecraft Mechanisms Engineer
Star Catcher
Jacksonville, FL
Experience with deployable structures such as booms, reflectors, or solar arrays, and the gravity offload techniques used to test them.
Added 13 days ago
Spacecraft Mechanical Design Engineer
Star Catcher
Jacksonville, FL
…revision state, and keep the stowed and deployed envelopes of deployable structures current as the design…

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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