Investor Relations Director

Radiant is an El Segundo CA-based startup building the worlds first mass-produced portable nuclear microreactors. The companys first reactor Kaleidos is a 1-megawatt fail-safe microreactor that can be transported anywhere power is needed and run for up to 5 years without refueling. Portable nuclear power with rapid-deploy capability can replace similar-sized diesel generators and provide critical asset support for hospitals data centers remote sites and military bases. Radiants unique practical approach to nuclear development leverages modern software engineering to rapidly deliver safe factory-built microreactors that use existing well-qualified materials. Founded in 2020 Radiant is on track to test its first reactor at the Idaho National Laboratory this summer with initial customer deliveries beginning in 2028.

About the Role
We recently closed a oversubscribed $350M Series D at a $1.8B valuation backed by Andreesen Horowitz DCVC Boost Ventures Draper Associates Chevron Tech Ventures Founders Fund IQT LM Ventures and others. Weve grown to north of 200 people this year and we are just getting started. Radiant is hiring a Director of Investor Relations to build and lead this function from the ground up. This is a senior high-visibility role reporting directly to the CFO and working closely with the CEO and Board. You will own the full investor lifecycle from prospecting and diligence support through ongoing relationship management across multiple investor types.

This role sits at the intersection of finance strategy communication and capital markets. You will be a key architect of how Radiant presents itself to sophisticated capital allocators and how we manage and grow our investor ecosystem over time.

What Youll Own:

• Build the IR function from the ground up: Own the strategy messaging materials and reporting cadence across our existing and prospective investor base.

• Build and maintain a structured investor prioritization framework across multiple investor segments.

• Develop deep knowledge of investor thesis fit sector appetite and decision-making dynamics.

• Maintain intelligence on market dynamics and capital market trends in nuclear energy advanced technology.

• Partner with the CFO and Executive team to support any financing processes including materials development logistics diligence coordination and investor Q&A.

• Prepare and maintain core IR materials: investor presentations data room financial models one-pagers FAQs.

• Serve as a key point of contact for existing investors: manage quarterly update cadence information-share rhythms and ad-hoc communications.

• Deepen relationships: keep existing investor close field inquiries manage communications and surface opportunities across our sophisticated cap table.

• Partner with CFO and exec team to prepare board meeting materials and investor updates.

• Help develop a scalable IR infrastructure: reporting frameworks disclosure processes investor day planning and materials management.

• Shape the narrative: advise on investor narrative and messaging as the company scales through key milestones translate financial performance product velocity and market position into a compelling consistent story.

• Partner with Marketing team to ensure investor-facing narrative is consistent with brand product and policy positioning.

• Identify and manage relevant speaking opportunities investor conferences and industry forums.

What Were Looking For:

• 812 years of relevant experience across investor relations investment banking buyside investing or equity research or corporate development preferably with exposure to deep-tech energy defense or infrastructure companies.

• Track record of supporting or leading fundraising processes at high-growth venture backed companies and represented the company at investor conferences and roadshows; public company IR experience a strong plus.

• Familiarity with the nuclear energy or advanced manufacturing sector strongly preferred.

• Experience working with a range of sophisticated institutional investors across equity debt and other asset classes.

• Established network across institutional investors VC and / or investment banking particularly in deep-tech energy defense or infrastructure companies.

• Exceptional written and verbal communication; ability to translate complex technical and financial content into compelling investor narratives.

• First-principles thinker with the ability to understand and manage first-of-a-kind products and contexts.

• Strong financial modeling and analytical chops; comfortable in Excel and able to engage substantively on valuation comparable company analysis and capital structure questions.

• Experience building and managing data rooms and coordinating multi-party diligence processes.

• Highly organized with the ability to manage multiple work streams under tight deadlines.

• Builder mentality: comfortable creating structure where none exists and owning outcomes end to end.

• Low-ego high-output; thrives in a lean fast-moving environment where everyone operates above their title.

• Mission-aligned: genuinely excited about Radiants role in energy national security and the future of nuclear power.

Additional Requirements:

• Must be willing to work extended hours and weekends as necessary to accomplish our mission.

• Must work 100% onsite at El Segundo HQ.

• Regular travel to Oak Ridge TN and investor meetings nationally should be expected.

• Stock: Substantial incentive stock plan for all full-time employees.

• Medical: 100% up to base silver level plan for employee 50% dependents offers up to Platinum plans.

• One Medical: Sponsored memberships for employees and their dependents.

• Vision: 100% top tier plan coverage 50% for dependents.

• Dental: 100% top tier plan coverage orthodontia extra 50% for dependents.

• Voluntary life accident hospital critical illness commuter and FSA/HSA are offered as employee contributed benefits.

• 8-weeks of paid parental leave for all parents. Additional paid pregnancy leave for CA employees.

• Daily catered lunch. Free snacks and drinks.

• Flexible PTO policy. Remote workday allocation.

• Company and team-bonding events happy hours and in-person camaraderie.

• Beautiful El Segundo headquarters close to the Pacific Ocean.

Total Compensation and Benefits
Radiant compensates people for impact and invests in those who continue to raise the bar. Radiants new hire compensation package includes base salary substantial equity grants and comprehensive health benefits. Total compensation and level are determined through a rigorous evaluation of interview performance experience education and qualifications and are designed to support continued growth as scope responsibility and impact expand at Radiant.

The best of todays advanced reactor builders dont wait for job postings. They join the winning team. If thats you contact us directly for immediate opportunities: .

We are an equal opportunity employer and all qualified applicants will receive consideration for employment without regard to race color religion sex sexual orientation gender identity or expression pregnancy age national origin disability status genetic information protected veteran status or any other characteristic protected by law.

This position involves access to technology that is subject to U.S. export controls. Any job offer made will be contingent upon the applicants capacity to serve in compliance with U.S. export controls.

Required Experience:

Director