---
title: 'Investor Relations Director at Radiant Industries'
canonical: 'https://feeny.ai/job/investor-relations-director-radiant-industries-el-segundo-rde45zb14zas'
type: 'job'
last_seen: '2026-11-09'
---

# Investor Relations Director at Radiant Industries

- **Company:** [Radiant Industries](https://feeny.ai/companies/radiant-industries)
- **Location:** El Segundo, CA
- **Compensation:** $155k–$256k
- **Employment:** full-time
- **Work type:** onsite
- **Posted:** 2026-06-17
- **Last confirmed live:** 2026-11-09
- **Apply:** https://jobs.ashbyhq.com/radiant-industries/1400558a-5f08-452c-ad18-42378a3ae1f0/application

**Skills:** Financial modeling, Excel, Data room management, Investor presentations, Capital markets, Nuclear sector knowledge, Energy sector knowledge, Advanced manufacturing sector knowledge, Public company IR experience

> Build and lead the investor relations function from the ground up for a nuclear microreactor startup. Own the full investor lifecycle, manage capital markets execution, and shape the company narrative for sophisticated capital allocators.

## Job description

## About Radiant

Radiant is an El Segundo, CA-based company building the world's only mass-produced, transportable nuclear microreactors. The U.S. grid is under growing strain, with power demand accelerating, driving higher utility costs, rising carbon emissions, and interconnection backlogs. Radiant has a solution, transportable, on-site power. Our first reactor, Kaleidos, is 1 megawatt: small enough to be factory-built, transported by land, sea, or air, and deployed wherever power is needed. 1 MW can power 1000 homes for five years. Ship it back and we refuel for a 20 year operating life. We made energy a product that can be used for critical infrastructure like military bases, data centers, hospitals, and remote sites, as well as the commercial main street businesses that keep America running. Founded in 2020, Radiant is under contract to deliver power to the U.S. Army, Navy and Air Force and has signed pre-order agreements with Equinix, with deployments 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. We’ve 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 You'll Own: Investor Strategy

- 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.

Capital Markets Execution

- 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.

Ongoing Investor Relations

- 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.

Strategic Communications

- 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 We're Looking For:

## Experience

- 8–12 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.

## Skills

- 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.

Mindset

- 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 Radiant's 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.

## Benefits and Perks

- 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.
- Nuclear Engineering Certificate Program: 100% covered educational program with Penn State University, for eligible employees, to rapidly upscale into nuclear.
- 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. Radiant’s full-time 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 today’s advanced reactor builders don’t wait for job postings. They join the winning team. If that’s you, contact us directly for immediate opportunities: recruiting@radiantnuclear.com.

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 applicant’s capacity to serve in compliance with U.S. export controls.

## About Radiant Industries

## Company Overview
- **One-liner**: Radiant Industries is building the world’s first mass‑produced, portable nuclear microreactor (Kaleidos) to replace diesel generators with zero‑emission, resilient power for remote sites, hospitals, data centers, and military installations.
- **Entity Type**: Private (Series D – $300M raised in December 2025, led by Lockheed Martin Ventures)
- **Headquarters**: El Segundo, California, USA
- **Founded**: 2020 (some sources list 2019)
- **Founders**: Not publicly disclosed

## Core Business
- **Primary industry**: Nuclear electric power generation / clean energy
- **Target customers**: B2B – remote communities, hospitals, data centers, military bases, industrial sites that currently rely on diesel generators or unstable grids
- **Mission**: To bring one of the world’s first factory‑constructed microreactors to market, providing portable, zero‑emissions power anywhere, anytime.

## Products & Services
- **[Kaleidos Microreactor](https://www.radiantnuclear.com/)**: A 1 MW electric / 1.9 MW thermal portable nuclear reactor packaged in a shipping container. It uses helium gas cooling and TRISO fuel (meltdown‑proof ceramic uranium particles). Delivered by truck or aircraft, installed without site excavation, and can reach full power the next day. After 5+ years the entire container is returned to the factory for refueling; up to four fuel cycles yield a 20‑year product lifetime. Customers purchase via Power Purchase Agreements (PPAs) or direct unit sales.

## Market Standing
- **Valuation / Market Cap**: Not disclosed
- **Key Metric**: Total funding raised – **$622.6M** (as of early 2026)
- **Notable Investors/Partners**: Andreessen Horowitz (led Series B), Lockheed Martin Ventures (led Series D), plus 18+ other investors across Series B, C, and D rounds
- **Growth Signals**:
  - Headcount grew **141% YoY** to 157 employees (as of mid‑2026)
  - 64 active job postings (+178% YoY)
  - Plans to test its development reactor in **2026** – which would be the first new commercial reactor design to achieve a fueled test in over 50 years
  - Initial customer deployments targeted for **2028**
  - SBIR Phase II awards from the U.S. Air Force for nuclear microreactor installation energy resilience

## Competitive Advantages
- **Portability & speed**: Delivered in a standard shipping container, installed in one day, no on‑site water or excavation needed.
- **Passive safety**: TRISO fuel is meltdown‑proof; the core is cooled by natural convection (air jacket) without pumps.
- **Factory‑built, factory‑refueled**: No nuclear waste or infrastructure left on site after the container is returned.
- **High energy density**: Over 110× the energy density of existing diesel systems.
- **Fleet monitoring**: Hundreds of units can be monitored 24/7 from a centralized control center.

## Strategic Focus
- Complete fueled testing of the Kaleidos prototype in 2026.
- Secure regulatory approvals (special nuclear material license, Part 7 license).
- Scale manufacturing for initial customer deployments beginning in 2028.
- Expand into military, commercial, and humanitarian markets (disaster relief, remote microgrids, backup power).

## Why Work Here
- **Culture & mission**: High‑impact climate tech – directly replacing diesel generators with clean nuclear power. Rated 5.0/5.0 on employer reviews (5 reviews) with strong scores for culture (4.7) and career growth (4.8).
- **Work location**: On‑site in El Segundo, CA (steps from the Pacific Ocean, near downtown). Employees work from a physical office.
- **Perks**: Company equity, relocation assistance, free daily meals, commuter benefits, onsite parking, generous parental leave, family medical leave, onsite Mother’s Room, dental/health insurance, FSA.
- **Diversity & inclusion**: Mandated unconscious bias training; hiring practices that promote diversity.
- **Tech stack**: React, TypeScript, Python, C++, C#, Kubernetes, Docker, PostgreSQL, AWS, Ansys, SolidWorks, Altium, and more. Engineers work on cutting‑edge nuclear, mechanical, and embedded systems.
- **Growth trajectory**: 141% headcount growth in the past year; 64 open roles across engineering, regulatory, supply chain, and operations.

## Sources
1. [radiantnuclear.com](https://www.radiantnuclear.com/) – Product details, specs, deployment model
2. [builtin.com](https://builtin.com/company/radiant) – Company overview, perks, culture, tech stack, reviews
3. [linkedin.com](https://www.linkedin.com/company/r-a-d-i-a-n-t) – Funding, headcount, employee growth, locations, key executives
4. [sbir.gov](https://www.sbir.gov/portfolio/1655711) – SBIR awards, Phase II contracts with U.S. Air Force
5. [jobs.ashbyhq.com](https://jobs.ashbyhq.com/radiant-industries) – Current open positions (64+)

## Other roles at Radiant Industries

- [Senior Build Engineer, Turbomachinery](https://feeny.ai/job/senior-build-engineer-turbomachinery-radiant-industries-el-segundo-m5wssr3vpxve) — El Segundo, CA
- [Staff Nuclear Engineer](https://feeny.ai/job/staff-nuclear-engineer-radiant-industries-el-segundo-yx5h3evqz8w6) — El Segundo, CA
- [Program Development Lead](https://feeny.ai/job/program-development-lead-radiant-industries-el-segundo-dat68x1gvag2) — El Segundo, CA
- [Senior Operations Associate](https://feeny.ai/job/senior-operations-associate-radiant-industries-el-segundo-tyvmyj7b34nr) — El Segundo, CA
- [Principal Thermal Modeling Engineer](https://feeny.ai/job/principal-thermal-modeling-engineer-radiant-industries-el-segundo-9kfh14wgzf1p) — El Segundo, CA
- [Principal Turbomachinery Engineer](https://feeny.ai/job/principal-turbomachinery-engineer-radiant-industries-el-segundo-t79km8ymbgam) — El Segundo, CA
- [Site Lead](https://feeny.ai/job/site-lead-radiant-industries-el-segundo-s3eqh34jwg06) — El Segundo, CA
- [Staff Regulatory Engineer](https://feeny.ai/job/staff-regulatory-engineer-radiant-industries-el-segundo-bsm92yhympbx) — El Segundo, CA
- [Senior Regulatory Engineer](https://feeny.ai/job/senior-regulatory-engineer-radiant-industries-el-segundo-nr50jybcam8n) — El Segundo, CA
- [Director of Regulatory Affairs](https://feeny.ai/job/director-of-regulatory-affairs-radiant-industries-washington-zcqq77x6texk) — Washington, DC