Develops autonomous microreactors for remote power
General Counsel
Full-Time
$190k - $300k/yr
Expert
JD
Los Angeles, CA, USA
In PersonOn-site at the Torrance, California facility; travel to regulatory locations as needed.
LegalLegal Counsel & Legal Support
No H1B Sponsorship
About the job
Requirements
A Juris Doctor from an accredited law school and active bar membership are required.
At least 12 years of legal experience are required.
Demonstrated experience managing government contracts, including Federal Acquisition Regulation and Defense Federal Acquisition Regulation Supplement contracts, and government-funded programs is required as one of the specified areas of expertise.
Hands-on experience building or leading an export controls compliance program under the International Traffic in Arms Regulations and/or Export Administration Regulations is required as one of the specified areas of expertise.
Experience with commercial contracts and regulatory matters is required as one of the specified areas of expertise.
Applicants must be a U.S. citizen or national, lawful permanent resident, refugee, or asylee, or be eligible to obtain the required U.S. Department of State authorizations.
The role requires the ability to work long hours and weekends as necessary to support critical milestones.
The role requires the ability to travel to regulatory locations as needed.
Responsibilities
Serve as Antares’ first in-house legal hire and primary legal partner to leadership, engineering, operations, finance, supply chain, business development, and people teams.
Support government contracts and government-funded programs, including proposal review, flow-down analysis, contract negotiation, compliance obligations, data rights, deliverables, reporting requirements, and program execution risk.
Serve as the primary legal point of contact for Department of Energy, Department of Defense, and other federal agency relationships and contractual obligations.
Draft, review, negotiate, and maintain commercial agreements, including nondisclosure agreements, vendor agreements, services agreements, consulting agreements, manufacturing and supply agreements, software-as-a-service agreements, testing agreements, teaming agreements, and strategic partnership agreements.
Provide legal counsel on nuclear regulatory matters, including Nuclear Regulatory Commission licensing, Department of Energy regulatory frameworks, nuclear materials handling, and applicable federal and state nuclear safety requirements.
Build, own, and continuously improve the company’s export controls compliance program, including policies, procedures, training, technology-control plans, visitor controls, deemed export processes, data handling practices, and escalation workflows under the International Traffic in Arms Regulations, Export Administration Regulations, and other applicable regimes.
Manage and scope external counsel across export controls, contracts, nuclear regulatory, corporate, employment, intellectual property, litigation, real estate, and financing matters.
Define the company’s legal infrastructure and procedures, including document retention, signature authority, contract lifecycle management, legal intake, entity management, board support, and corporate governance processes.
Create scalable contract templates, negotiation playbooks, approval workflows, fallback positions, and internal guidance to reduce legal bottlenecks as the company grows.
Own day-to-day legal support across the company, providing practical, business-oriented advice that enables rapid execution while appropriately managing legal, regulatory, and reputational risk.
Desired Qualifications
Experience as General Counsel or Deputy General Counsel at a high-growth technology or deep-tech company.
Deep familiarity with Nuclear Regulatory Commission licensing processes, Department of Energy contracting vehicles such as Cooperative Research and Development Agreements and Work for Others agreements, and nuclear materials regulations.
Experience supporting board governance, venture financings, and mergers and acquisitions transactions.
Broad experience across legal domains including contracts, intellectual property, and export compliance.
Success in a start-up environment or similar, with the ability to manage ambiguity and take on varied responsibilities.
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 Team
Antares is looking for its first General Counsel — a seasoned legal leader who will build and own the legal and compliance foundation required to take our nuclear microreactors from prototyping through full-rate production and commercial deployment. This is a defining leadership role at a pivotal moment in the company's growth.
As GC, you will serve as a trusted advisor and strategic partner to the CEO and executive team. You will lead legal and compliance functions across the company, and you will partner closely with engineering, operations, finance, supply chain, business development, and people teams to enable rapid execution while ensuring Antares operates within an appropriate legal and regulatory framework.
The ideal candidate has deep experience at the intersection of government contracting, nuclear or regulated environments, and export controls, and thrives in the ambiguity and pace of an early-stage, mission-driven company. You are not just a legal advisor; you are a builder, a business partner, and a key member of the leadership team.
Roles and Responsibilities:
Serve as Antares’ first in-house legal hire and primary legal partner to leadership, engineering, operations, finance, supply chain, business development, and people teams.
Support government contracts and government-funded programs, including proposal review, flow-down analysis, contract negotiation, compliance obligations, data rights, deliverables, reporting requirements, and program execution risk.
Serve as the primary legal point of contact for DOE, DoD, and other federal agency relationships and contractual obligations
Draft, review, negotiate, and maintain a broad range of commercial agreements, including NDAs, vendor agreements, services agreements, consulting agreements, manufacturing and supply agreements, software/SaaS agreements, testing agreements, teaming agreements, and strategic partnership agreements.
Provide legal counsel on nuclear regulatory matters, including NRC licensing, DOE regulatory frameworks, nuclear materials handling, and compliance with applicable federal and state nuclear safety requirements.
Build, own, and continuously improve Antares’ export controls compliance program, including ITAR, EAR, and other applicable regimes, including policies, procedures, training, technology-control plans, visitor controls, deemed export processes, data handling practices, and escalation workflows.
Manage and scope external counsel across specialized areas including export controls, contracts, nuclear regulatory, corporate, employment, intellectual property, litigation, real estate, and financing matters.
Define the company’s legal infrastructure and procedures, including document retention, signature authority, contract lifecycle management, legal intake, entity management, board support, and corporate governance processes.
Create scalable contract templates, negotiation playbooks, approval workflows, fallback positions, and internal guidance to reduce legal bottlenecks as Antares grows.
Own day-to-day legal support across the company, providing practical, business-oriented advice that enables rapid execution while appropriately managing legal, regulatory, and reputational risk
Basic Qualifications:
JD from an accredited law school and active bar membership
12 + years of legal experience
Experience in 2 out of the 3 areas of expertise
Demonstrated experience managing government contracts (FAR/DFARS) and government-funded programs
Hands-on experience building or leading an export controls compliance program (ITAR and/or EAR)
Experience with commercial contracts and regulatory matters
Preferred Skills & Experience:
Experience as General Counsel or Deputy General Counsel at a high-growth technology or deep tech company
Deep familiarity with NRC licensing processes, DOE contracting vehicles (e.g. CRADA, WFO), and nuclear materials regulations
Experience supporting board governance, venture financings, and M&A transactions
Broad experience in a range of legal domains across contracts, intellectual property, export compliance, and others
Proven success in a start-up environment or similar, with the ability to manage ambiguity and wear many different hats
Additional Requirements:
Ability to work long hours and weekends as necessary to support critical milestones
Ability to travel to regulatory locations as needed
Location
We are located in Torrance, CA in a 322,000 square foot, brand new facility featuring large open spaces for team collaboration, R&D, and production, as well as easy access to the 405, 105, and 110 freeways. Our facility is in the heart of Los Angeles' vibrant emerging tech ecosystem alongside many other high growth startups and enterprises.
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.
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.
Exosens supports the accelerating deployment of next-generation nuclear technologies in the U.S.
October 08, 2026 12:00 ET | Source: Exosens
* Key milestones achieved under the U.S. Department of Energy's Reactor Pilot Program highlight the accelerating deployment of next-generation nuclear technologies
* Exosens' advanced neutron flux monitoring detectors supported successful criticality demonstrations by Antares Nuclear and Valar Atomics, underscoring the relevance of its technologies across Small Modular Reactor (SMR) applications
* These achievements are expected to translate into near-term pre-series production orders and support long-term demand for Exosens' nuclear instrumentation solutions
Press release, Mérignac (France), 8 October 2026 - Exosens (EXENS; FR001400Q9V2), a high-tech company focused on providing mission- and performance-critical amplification, detection and imaging technologies, today announces its contribution to two successful criticality demonstrations for next-generation nuclear reactors under the U.S. Department of Energy's Reactor Pilot Program.
In August 2025, the program initially selected 11 advanced reactor projects with the goal of bringing at least three reactor designs to criticality by 4 July 2026. The program exceeded that objective, with four projects reaching this milestone by the deadline. These achievements mark a decisive step towards the commercial deployment of next-generation nuclear technologies on an accelerated timeline in the United States, particularly across SMR applications.
Against this backdrop, Exosens supplied high-performance neutron detectors and related technical expertise to Antares Nuclear and Valar Atomics, the developers behind the first two reactor designs to reach criticality as part of the DOE's Reactor Pilot Program. Integrated into safety-related neutron flux monitoring systems, these advanced detectors provide the measurements required to monitor reactor power and track the approach to criticality during start-up and testing.
These achievements are expected to translate into pre-series production orders in the near term and support long-term demand for Exosens' nuclear instrumentation solutions across the U.S. market.
"The move towards commercial deployment of next-generation nuclear technologies is accelerating in the United States, supported by increasing demand for reliable, carbon-free power, notably to meet the unprecedented energy requirements of AI-enabled data centers. This momentum is reinforcing investment in SMR technologies and driving demand for high-performance instrumentation designed for demanding nuclear environments, creating significant long-term growth opportunities for Exosens. Already providing advanced nuclear detection solutions for seven SMR-related projects across the United States and Europe, Exosens leverages its differentiated technologies, deep nuclear expertise and industrial capabilities to address these needs and support the long-term development of the SMR market," said Jérôme Cerisier, CEO of Exosens.
"Achieving criticality is a defining milestone in next-generation reactor development. The progress made by Antares Nuclear and Valar Atomics demonstrates the pace of innovation across the U.S. nuclear industry. We are proud to have supported these successful demonstrations through Exosens' advanced neutron flux monitoring technologies, and look forward to helping reactor developers as they move from first-of-a-kind testing towards safe, reliable commercial deployment," said Cyril Barre, Nuclear Instrumentation Director at Exosens.
Financial calendar
* 27/10/2026: 9M 2026 revenue and adjusted gross margin (before market opening).
* 22/02/2027: FY 2026 results (before market opening).
About Exosens
Exosens is a high-tech company with more than 85 years of experience in the innovation, development, manufacturing and sale of high-end electro-optical technologies in the fields of amplification, detection and imaging. Today, it offers its customers detectors and imaging solutions such as digital cameras, ion, electron, neutron and gamma-ray detectors as well as image intensifier tubes. This enables Exosens to address complex challenges in extremely demanding environments by providing its customers with tailor-made solutions. Thanks to its sustained investment, Exosens is internationally recognized as a major innovator in optoelectronics, with production and R&D activities carried out at 13 sites across Europe and North America and more than 2,000 employees. Exosens is listed on compartment A of the regulated market of Euronext Paris (Ticker: EXENS - ISIN: FR001400Q9V2). Exosens is a member of the Euronext Tech Leaders segment and is also included in several indices, including SBF 120, CAC All-Tradable, CAC Mid 60, FTSE Total Cap and MSCI France Small Cap. For more information: www.exosens.com.
Investor Relations
Media Relations
Louisiana-based nuclear microreactor startup Antares has secured a $161 million Strategic Breakthrough award from the US Space Force to develop nuclear power systems for future space missions. The funding represents one of the largest current US defence investments in space nuclear power.
Antares will first demonstrate its R1-S reactor design on the ground before integrating it with a spacecraft for flight certification. The company plans to begin testing its Mark-1 reactor in 2027, which will operate for over six months during the test campaign.
The startup achieved a significant milestone in June when its Mark-0 microreactor reached initial criticality at Idaho National Laboratory, making Antares the first private company to achieve advanced-reactor criticality under the Department of Energy's Reactor Pilot Program.
The US has not operated a nuclear reactor in space since NASA's SNAP-10A mission in 1965.
Antares wins $161 million Space Force award for nuclear reactor demonstration.
September 11, 2026
Rendering of a nuclear-powered spacecraft in Earth orbit
Antares has been selected for a $161 million Strategic Breakthrough award to demonstrate nuclear power technology for space, giving the nuclear energy company a path to test its R1-S reactor on the ground and integrate the system with a spacecraft ahead of flight certification and launch.
The award was made through the Office of the Assistant Secretary of the Air Force for Space Acquisition and Integration and represents the largest Department of War award for space nuclear power to date, according to Antares.
Under the program, Antares will conduct a nuclear ground demonstration of its R1-S system before integrating the reactor with a spacecraft for flight certification. The work moves the company's compact fission technology toward an operational space mission rather than limiting development to reactor testing.
Antares will also use Mark-1, its electricity-producing reactor, to power an operational ground-to-space asset. Testing of Mark-1 is scheduled for 2027, creating another step in validating how the company's reactor and power-conversion technologies perform as an integrated energy system.
"This partnership with the Space Force turns that long-held vision into a codified space mission," CEO and co-founder Jordan Bramble said. "Fission will unlock strategic capabilities that are impossible today."
The program addresses one of the central infrastructure constraints for more power-intensive spacecraft: generating reliable electricity while maintaining sufficient propulsion capacity for maneuvering. Nuclear fission could provide continuous power for systems with heavier computing requirements and other high-demand payloads without depending on conventional spacecraft power architectures alone.
Antares is targeting applications including advanced computing, directed-energy systems and electromagnetic warfare. The company also sees nuclear power as a way to reduce propulsion-related operational constraints, potentially allowing spacecraft to conduct more dynamic maneuvers while maintaining power for onboard systems.
The award builds on a reactor milestone Antares reached earlier this year. On June 4, 2026, its Mark-0 microreactor achieved initial criticality at Idaho National Laboratory under Department of Energy authorization. Antares said the milestone made it the first private company to bring an advanced reactor to criticality through the DOE Reactor Pilot Program.
The next stage centers on producing usable electricity. Antares plans to operate its Mark-1 reactor for more than six months in 2027, integrating it with the company's nitrogen closed Brayton cycle power-conversion system. That configuration is designed to move development beyond reactor physics and demonstrate an integrated system capable of converting reactor heat into electricity.
Successfully coupling the reactor with power conversion is an important operational requirement for both terrestrial and space applications. The company's development sequence moves from Mark-0 criticality to extended Mark-1 electricity production, followed by the R1-S ground demonstration and spacecraft integration required for a potential flight mission.
The Strategic Breakthrough program also aligns with federal plans to accelerate deployment of nuclear power beyond Earth. Antares said the award supports goals established by Executive Order 14369, "Ensuring American Space Superiority," and the National Initiative for American Space Nuclear Power established through NSTM-3. Those policies call for nuclear reactors to be launched into space as early as 2028 and deployed on the lunar surface by 2030.
Founded in 2023, Antares is developing compact nuclear microreactors for defense and space applications. The company has raised more than $600 million and expects initial production deployments at U.S. military installations beginning in 2028.
Antares operates facilities in Torrance, California; Idaho Falls, Idaho; and Aiken, South Carolina. The $161 million award adds a dedicated space mission to a development program that is now moving from reactor criticality toward electricity generation, spacecraft integration and eventual deployment.
Antares wins $161M award for space nuclear power.
Friday September 11, 2026 Waxing Crescent
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Antares selected for $161M Strategic Breakthrough award to demonstrate space reactor.
Published at September 11th 2026, 10:28 AM EDT via Business Wire
i This article is third-party content and does not represent the views of this site. We make no guarantees regarding its accuracy or completeness.
Effort will carry a nuclear-powered spacecraft toward flight qualification
Nuclear Energy
Antares today announced it has been selected by the Office of the Assistant Secretary of the Air Force for Space Acquisition and Integration for a Strategic Breakthrough award to advance nuclear power for space. It marks the largest current Department of War award in space nuclear power.
Rendering of a nuclear-powered spacecraft in Earth orbit
"Space has been core to the Antares thesis since the company was founded," said Jordan Bramble, CEO and co-founder of Antares. "This partnership with the Space Force turns that long-held vision into a codified space mission. Fission will unlock strategic capabilities that are impossible today."
Through this program, Antares will perform a nuclear ground demonstration of the R1-S and integrate with a spacecraft for flight certification forward of launch. The company will also power an operational ground-to-space asset with Mark-1, its electricity-producing reactor, scheduled for testing in 2027.
Space nuclear has been core to Antares from day one. It removes propulsion constraints for the Space Force, allowing spacecraft to maneuver without regret and carry out dynamic operations that were once impossible. Most importantly, it brings high, always-on power to support heavier compute loads, directed energy systems, and the future of electromagnetic warfare.
On June 4, 2026, Antares' Mark-0 microreactor achieved initial criticality at Idaho National Laboratory under Department of Energy authorization, making Antares the first private company to bring an advanced reactor to criticality under the DOE Reactor Pilot Program. The company's Mark-1 reactor is scheduled to operate for more than six months in 2027, integrated with its nitrogen closed Brayton cycle power conversion system.
The award supports goals set in Executive Order 14369, "Ensuring American Space Superiority," and the National Initiative for American Space Nuclear Power established by NSTM-3, which direct the launch of nuclear reactors in space as early as 2028 and on the lunar surface by 2030.
About Antares
Antares is a nuclear fission energy company developing compact microreactors for defense and space applications, delivering safe, reliable power where traditional energy sources cannot. Founded in 2023 and backed by over $600 million in funding, Antares achieved initial criticality of its Mark-0 microreactor in 2026 under the DOE Reactor Pilot Program, and is on track to produce electricity from an advanced reactor in 2027, with initial production deployments to U.S. military installations beginning in 2028. Antares operates facilities in Torrance, California; Idaho Falls, Idaho; and Aiken, South Carolina.
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