Chief of Staff

About this role

Hexium is rebuilding America's isotope enrichment capability by modernizing Atomic Vapor Laser Isotope Separation (AVLIS) into a scalable industrial enrichment platform. As our technology matures, we're building industrial capability, navigating a complex regulatory landscape, raising capital, and establishing the operational foundation needed to commercialize a new generation of enrichment technology.
The Chief of Staff is the CEO's trusted thought partner and execution lead, helping transform the company's highest-priority objectives into coordinated action across the organization. Working closely with the CEO, you'll help prepare for and support engagements with investors, federal agencies, national laboratories, strategic partners, and the Board of Directors while ensuring key decisions, commitments, and initiatives continue moving forward.
This is not an administrative support role. It is a high-impact leadership position that requires exceptional judgment, executive presence, and the ability to move seamlessly between external engagement and hands-on execution. You'll lead cross-functional initiatives, prepare briefing materials and analyses, structure decision-making, identify organizational bottlenecks, and build the operating rhythms that enable the company to scale effectively.
Key Responsibilities
Executive Partnership

Serve as a trusted thought partner to the CEO, providing research, analysis, and sound judgment to support high-impact decisions.

Ensure the CEO is fully prepared for critical meetings, negotiations, Board meetings, and external engagements through concise briefing materials, analysis, and recommendations.

Drive follow-through on executive priorities, ensuring key commitments, decisions, and initiatives move from discussion to execution.

External Engagement

Support relationships with investors, federal agencies, national laboratories, strategic partners, and other senior stakeholders.

Prepare executive briefing materials, presentations, talking points, and supporting analyses for high-stakes meetings.

Represent the Office of the CEO with professionalism and discretion when appropriate.

Cross-Functional Execution

Lead complex, cross-functional initiatives spanning engineering, finance, regulatory affairs, government affairs, facilities, and corporate operations.

Translate executive priorities into coordinated action, driving alignment, accountability, and measurable progress across teams.

Identify organizational bottlenecks and recommend improvements to operating rhythms, decision-making processes, and organizational effectiveness.

Capital Formation

Support private fundraising activities by coordinating investor follow-up, maintaining momentum between financing rounds, and preparing investor-facing materials.

Help develop executive presentations, company narratives, and supporting materials for investors and other external audiences.

Required Qualifications

5+ years of experience in a Chief of Staff, strategy, external affairs, or similar externally-facing high-execution role

Experience supporting executive engagement with investors, government agencies, or strategic partners.

Demonstrated ability to interact confidently with senior executives and external stakeholders.

Exceptional executive communication skills, including executive correspondence and preparation of presentations and board/investor-facing materials.

Comfort operating across highly technical, regulatory, and financial domains simultaneously

Demonstrated ability to operate with significant autonomy and ambiguity, in an environment where priorities shift quickly

Bachelor’s degree required

This role will be exposed to export-controlled and classified information and requires compliance with applicable export control regulations and eligibility to obtain and maintain a DOE Q security clearance.

Preferred Qualifications

Prior experience at a high-growth startup, ideally in a capital-intensive or regulated industry

Experience directly supporting executive-level engagement with government agencies or national laboratories

Experience supporting a CEO through a fundraising round

Management consulting background (strategy or operations focus)

Familiarity with the federal contracting/nuclear regulatory landscape

Work Environment & Physical Requirements

This position may be based remotely within the United States or on-site in Austin, Texas, depending on business needs.

Regular travel will be required to support meetings with external stakeholders. Additional travel to the company's Austin headquarters may be expected.

Must have ability to sit/work at a computer for extended periods.

Must have ability to communicate clearly, verbally and in writing, in English.

Benefits

Stock Options

Paid Time Off

401(k) Matching

Medical, Dental, Vision insurance

HSA & FSAs

E-Verify: Hexium Inc. participates in E-Verify. All new hires are required to complete the I-9 employment eligibility verification form and provide documentation to confirm their identity and authorization to work in the United States.
Screening: Employment is contingent upon successful completion of a background check.
Please note this job description is not designed to cover or contain a comprehensive listing of activities, duties or responsibilities that are required of the employee for this job.
Hexium Inc. is an Equal Employment Opportunity Employer. We provide equal employment opportunities to all employees and applicants for employment and prohibit discrimination and harassment of any type without regard to race, color, religion, age, sex, national origin, disability status, genetics, protected veteran status, sexual orientation, gender identity or expression, or any other characteristic protected by federal, state, or local laws. Hexium Inc. is committed to ensuring equal access and providing reasonable accommodations for applicants and employees with disabilities upon request. If reasonable accommodation…