Executive Assistant

Antares; Washington (District of Columbia); On-site; USD 90,000 - 130,000; Full time

Job summary

Antares is seeking an organized, highly capable executive assistant to support the Chief Nuclear Officer and the DC team. You will manage complex calendars, travel, and materials while handling confidential information with discretion across domestic and international stakeholders.

The role requires exceptional communication, proactive problem solving, and the ability to thrive in a fast-paced mission-driven environment across multiple time zones.

Qualifications

• 3+ years supporting C-level execs ideally within government, tech, defense, or high-growth startups.
• Proficient in Microsoft Office suite and Slack.

Responsibilities

• Coordinate the CNO’s calendar, meetings, and travel arrangements, domestically and internationally.
• Support scheduling for the DC team as needed.
• Prepare agendas, briefing materials, and follow‑up communications for the CNO and DC leadership.
• Manage confidential projects and communications with investors and partners.
• Serve as liaison across internal teams and external partners.
• Conduct ad-hoc research and light analysis to support strategic initiatives.
• Prepare materials such as presentations, reports, and internal documentation.
• Maintain project timelines and deliverables for the CNO and DC Team.

Skills

Executive support

Microsoft Office

Slack

Tools

Microsoft Office

Slack

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

Reporting directly to the Chief Nuclear Officer (CNO), you'll execute high-level administrative functions and act as the hub between leadership, partners, candidates, and government officials, both domestic and international. This role demands extreme organization, discretion, seamless communication, and the ability to thrive in a fast-paced, mission-driven environment across multiple time zones.

Roles and Responsibilities:

• Coordinate the CNO’s complex calendar, meetings, and travel arrangements, both domestic and international.
• Support scheduling for the larger DC team as needed.
• Prepare agendas, briefing materials, and follow‑up communications on behalf of the CNO and DC leadership.
• Manage confidential projects, documents, and communications with investors and partners with discretion.
• Serve as liaison across internal teams (Antares offices in DC, Los Angeles, Idaho, Seattle, South Carolina, etc.) and external partners (both public and private).
• Conduct ad‑hoc research and light analysis to support strategic initiatives.
• Prepare materials such as presentations, reports, and internal documentation.
• Maintain project timelines and track CNO and DC Team deliverables as requested.
• Management of the office.

Basic Qualifications:

• 3+ years supporting C-level execs ideally within government, tech, defense, or high-growth startups.
• Experience using the Microsoft Office suite and Slack.

Preferred Skills & Experience:

• Exceptional verbal and written communication skills.
• Proactive, highly organized, with strong problem‑solving skills.
• High emotional intelligence, calm under pressure.
• Proactive and self‑motivated.
• Able to handle confidential information with discretion.
• Skilled at juggling multiple projects while keeping nothing from slipping through the cracks.
• Driven, curious, and eager to take on more responsibility over time.

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.

Compensation Range: $90K - $130K