---
title: 'Security Engineer (Fuse Corp) at Fuse'
canonical: 'https://feeny.ai/job/security-engineer-fuse-corp-fuse-san-leandro-ny5j9cmv18qr'
type: 'job'
last_seen: '2026-10-13'
---

# Security Engineer (Fuse Corp) at Fuse

- **Company:** Fuse
- **Location:** San Leandro, CA
- **Employment:** full-time
- **Work type:** onsite
- **Posted:** 2026-10-08
- **Last confirmed live:** 2026-10-13
- **Apply:** https://jobs.ashbyhq.com/fuse/09f1be75-8a26-49f1-8f32-ada2aa711b3f

## Job description

## About Fuse

We are building one of the most potentially consequential companies of the century. Our mission is to accelerate the world's transition to fusion energy while safeguarding humankind. This is not a normal company. This is not a normal job. We are committed for the long term to win.

## About the Role

We're hiring our first dedicated Security Engineer to own security across a growing and technically diverse footprint: cloud infrastructure, software development practices, control systems, and data collection pipelines. You'll work alongside our IT Systems Administrator, who owns day-to-day device/identity operations - you'll set the security strategy, standards, and technical controls, and partner with them on enforcement. This role sits at the intersection of cloud security, DevSecOps, and OT/control-systems security with real ownership from day one.

## What We Value

- Obsess about the details — sloppy work costs us later, so do it right the first time.
- Care — pick up the trash. Do things no one asks you to do. Go the extra mile because you care.
- Act with urgency — every hour matters more than it feels like it does.
- Be responsible for the outcome, not just the task; if it is not working, it remains your problem until it is fixed.
- Assume good intent — disagree openly, then commit fully once a call is made.

Core Responsibilities

- Own security posture for AWS infrastructure managed via Terraform and Spacelift, including IAM policy review, secrets management, and network segmentation.
- Partner with engineering to build security into the SDLC and CI/CD pipeline - code scanning, dependency/vulnerability management, secure defaults for new services.
- Assess and secure control systems and data collection infrastructure.
- Own and operate our security monitoring and detection tooling; triage alerts and build out detection coverage over time.
- Define access-control standards (conditional access, least privilege, MFA policy) in IdP and across SaaS tools; partner with IT Admin on enforcement.
- Define MDM security baselines (macOS/Windows) for IT to implement and maintain.
- Build and lead incident response efforts when issues arise.
- Track security risk across the environment and lay groundwork for relevant compliance frameworks as the company matures.
- Run periodic security awareness efforts (phishing simulations, training) for a non-security-native team.

## Minimum Qualifications

- 4+ years in a security engineering role spanning cloud security and application/DevSecOps work.
- Strong hands-on experience with AWS and Infrastructure-as-Code (Terraform).
- Practical experience with identity security — SSO/IdP policy (Okta or equivalent), conditional access, least-privilege design.
- Experience with a security monitoring/detection platform (SIEM, EDR, or specialized tools) — alert triage, tuning, investigation.
- Solid understanding of secure SDLC practices — SAST/DAST, dependency scanning, secrets management, code review for security issues.
- Strong ability to communicate risk clearly to non-security stakeholders and make pragmatic trade-offs for a small, fast-moving company.

## Preferred Qualifications

- Direct experience securing control systems, OT, or industrial environments.
- Experience with CI/CD-integrated IaC workflows (Spacelift or similar).
- Experience with data collection pipeline security (data integrity, sensor/telemetry access controls).
- Prior experience as employee #1 or #2 on a security team, building programs from scratch.
- Compliance experience (SOC 2, ISO 27001, NIST, or sector-specific frameworks relevant to hardware/control systems companies).
- Scripting/automation skills (Python, Go) to build custom detections or automate security tooling.
- Experience in a company where hardware, CAD/simulation workstations, or physical systems intersect with traditional IT.

Additional Requirements

- Comfortable being the sole dedicated security resource, setting strategy while partnering with IT for day-to-day enforcement.
- Availability for incident response outside standard business hours when needed.
- Based in or willing to work from our San Leandro, CA office given the control systems and hardware-adjacent scope of the role.
- Occasional travel to other Fuse locations.
- Willingness to obtain relevant certifications (e.g., AWS Security, GIAC/GSEC) if not already held, as the role and compliance needs mature.

## Benefits

- Medical, dental, and vision coverage.
- Relocation assistance for roles that require it.
- Flexible time off. Take what you need, no accrual tracking.
- 2 weeks of paid time off built into the end of each year (subject to team and business needs).
- 10+ paid holidays.
- Supportive leave of absence policies.
- Paid leave for new parents.
- Access to a 401(k) retirement plan.
- Meals provided on site at our San Leandro and Napierville facilities.

ITAR Requirements To conform to U.S. Government technology export regulations, including the International Traffic in Arms Regulations (ITAR), you must be a U.S. citizen, lawful permanent resident of the U.S., protected individual as defined by 8 U.S.C. 1324b(a)(3), or eligible to obtain the required authorizations from the U.S. Department of State.

## Equal Opportunity

Fuse is an Equal Opportunity Employer; employment with Fuse is governed on the basis of merit, competence, and qualifications and will not be influenced by race, color, religion, gender, national origin/ethnicity, veteran status, disability status, age, ancestry, immigration status, sexual orientation, gender identity, marital status, mental or physical disability, or any other legally protected status.

## About Fuse

## Company Overview
- **One-liner**: Fuse is a fusion energy and defense company developing magnetized-liner inertial fusion (MagLIF) technology to deliver clean, on-demand power while providing radiation testing services for national security customers.
- **Entity Type**: Private (Series A)
- **Headquarters**: San Leandro, California, United States (operates "Fuseville" facility)
- **Founded**: 2018 (per CB Insights) or 2019 (per Wikipedia); founder J.C. Btaiche started the company at age 19
- **Founders**: J.C. Btaiche

## Core Business
- **Primary industry/industries**: Fusion energy, defense, nuclear effects testing, pulsed power engineering
- **Target customers**: U.S. government (Air Force, NNSA, national labs), defense contractors, eventually commercial energy utilities
- **Mission or purpose statement**: "Accelerating the World’s Transition to Fusion Energy" — building the fastest practical path to abundant, clean, safe, on-demand energy

## Products & Services
- **TITAN**: A 1 TW Impedance-Matched Marx Generator (IMG) — the essential MagLIF pulser building block. World’s first high-energy, high-power IMG, demonstrated in 2024 with results published in *Nature Scientific Reports*.
- **Z-Star**: A 15 TW MagLIF generator designed to iterate on and solve system engineering challenges (targeting 2027).
- **Apeiron I**: A pilot fusion plant design aiming to demonstrate a MagLIF hybrid plant core (targeting 203x).
- **FAETON I**: Neutron-producing fusion generator (over 1 trillion neutrons generated).
- **Radiation Testing Services (HEART)**: Hardened Electronics And Radiation Testing — providing short-burst radiation testing for government and commercial hardware resilience.

## Market Standing
- **Valuation**: Over $200 million as of September 2024 (per Bloomberg News)
- **Total Funding**: $32 million raised (Series A)
- **Key Metric**: 100+ employees; 2 patents filed; 53 employees as of 2024 (Wikipedia)
- **Notable Investors/Partners**: Bracket Capital, Tamarack Global, Buckley Ventures. Government partners: U.S. Air Force, National Nuclear Security Administration, Sandia National Laboratories, Los Alamos National Laboratory.
- **Growth Signals**: Awarded USAF contract (Feb 2024); published in *Nature Scientific Reports* (July 2024); former NNSA Administrator Lisa Gordon-Hagerty joined board; building Z-Star and Apeiron I platforms; operating a radiation facility covered by *Wired*.

## Competitive Advantages
- **MagLIF approach**: Integrates proven fusion technologies (magnetic and inertial) — demonstrated feasible by Sandia National Lab (2018, 2022). Fuse’s focus on engineering efficiency and affordability aims to solve repetition rate and cost barriers.
- **Rapid iteration**: Delivered two neutron-producing fusion generators and the world’s first IMG pulser in under three years, on time and on a lean budget.
- **Dual-use revenue model**: Generates revenue now through nuclear effects testing for defense customers while developing long-term fusion power — de-risking the path to commercial fusion.
- **Deep government relationships**: Contracts with USAF, NNSA, and CRADAs with Sandia and Los Alamos. Advisory board includes former Under Secretary of Energy, former CIA COO, former NSA Deputy Director, and senior military officers.
- **Patents**: 2 filed patents protecting core technology.

## Strategic Focus
- **Immediate**: Scale the pulsed power driver technology (Z-Star) and continue delivering radiation testing services to defense and intelligence customers.
- **Medium-term**: Demonstrate a MagLIF hybrid plant core with Apeiron I.
- **Long-term**: Deploy commercial fusion power plants, achieving 90% energy efficiency and enabling clean, on-demand energy at scale.
- **Talent**: Aggressively hiring for plasma physics, electrical engineering, pulse power, mechanical engineering, and experimental physics roles.

## Why Work Here
- **Culture**: Described as "misfits, tinkerers, skeptics, doers" — drawn to impossible problems. Values include frugality, speed, hands-on experimentation, and deep technical conviction. "Fuse is not a comfortable environment" — no bean bag chairs; many live, eat, and work at the facility.
- **Work environment**: "Fuseville" — a shipping-container communal living facility adjacent to the lab. Bed-to-reactor commute under 60 seconds. Sleep pods available. You'll likely build your own desk. "We really skimp on furniture."
- **Compensation**: Low salaries — "you should be willing to work for free. While you will receive a minimum base so that you can survive, money and lifestyle is not the motivator." Significant stock option upside if fusion succeeds. "Fair wages. Long hours. High voltage. Success far from guaranteed."
- **Benefits**: Competitive healthcare plan. High-end computer setup and cloud computing resources. "Everyone on the team has skin in the game."
- **Who should apply**: Self-motivated, deeply internally driven, humble yet brilliant, fusion geeks who built Polywells in high school, boundary-pushers who "get shit done." Must be comfortable with deferred gratification and high risk.
- **Remote/hybrid policy**: Not explicitly stated, but the "Fuseville" on-site living model suggests heavy in-person presence is expected. "Commuting makes your blood boil" is a stated value.
- **Notable perks**: Working on one of humanity’s hardest problems alongside top 1% talent; national security impact; potential enormous financial reward via stock options; "glory in case of ignition."

## Sources
1. [f.energy](https://www.f.energy/)
2. [f.energy - About](https://www.f.energy/about-fuse-energy)
3. [f.energy - Join Us](https://www.f.energy/join-us)
4. [CB Insights](https://www.cbinsights.com/company/fuse-energy-technologies)
5. [Wikipedia](https://en.wikipedia.org/wiki/Fuse_Energy_Technologies_Corporation)
6. [Jobs page](https://jobs.ashbyhq.com/fuse)

## Other roles at Fuse

- [IT System Administrator (Fuse Corp)](https://feeny.ai/job/it-system-administrator-fuse-corp-fuse-san-leandro-jgpta6gqdgg9) — San Leandro, CA
- [FSO/ITPSO (Fuse Fed)](https://feeny.ai/job/fso-itpso-fuse-fed-fuse-fuse-federal-albuquerque-3qer3v7mpvze) — Fuse Federal Albuquerque, NM
- [IT System Administrator (Fuse Fed)](https://feeny.ai/job/it-system-administrator-fuse-fed-fuse-fuse-federal-albuquerque-ry10tqst0n42) — Fuse Federal Albuquerque, NM
- [Health Physicist](https://feeny.ai/job/health-physicist-fuse-albuquerque-gddj5k91cqf5) — Albuquerque, NM
- [Head of Government Affairs](https://feeny.ai/job/head-of-government-affairs-fuse-washington-19z8bhwga0xj) — Washington, DC
- [Director, Defense Prime Partnerships](https://feeny.ai/job/director-defense-prime-partnerships-fuse-washington-1fz4np6nf5jd) — Washington, DC
- [Director of Commercial Partnerships](https://feeny.ai/job/director-of-commercial-partnerships-fuse-san-leandro-amvyfmb02jh8) — San Leandro, CA
- [Director of Contracts](https://feeny.ai/job/director-of-contracts-fuse-washington-jwcd5z44856p) — Washington, DC
- [Technician](https://feeny.ai/job/technician-fuse-albuquerque-9fazbpqp0gzv) — Albuquerque, NM
- [Mechanical Engineer](https://feeny.ai/job/mechanical-engineer-fuse-albuquerque-d3egysth0c2j) — Albuquerque, NM