X-energy

Develops advanced small modular nuclear reactors and fuel technology.

x-energy.comNuclear Energy, Energy Technology1,771 employeesUS
PrivateFounded 2009Series D (2025)Nuclear reactor designNuclear fuel manufacturingEnergy technology developmentNuclear engineering servicesClean energy generation
Showing 132 matching jobs
Title
Thermal Analysis Engineer
Full Time · $70K-$163K
Rockville, Maryland, United States · Hybrid
Manager, Engineering Integration
Full Time · $105K-$175K · 10+ YOE
Rockville, Maryland, United States · Hybrid
Engineer III, Nuclear Fire Protection
Full Time · $85K-$142K · 5+ YOE
Rockville, Maryland, United States · Onsite
Structural Analysis Engineer, Metallics
Full Time · $80K-$198K · 2+ YOE
Rockville, Maryland, United States · Hybrid
Specialist V, Piping & In-line Devices
Full Time · $116K-$193K · 15+ YOE
Rockville, Maryland, United States · Onsite
Senior Thermal Analysis Engineer
Full Time · $131K-$218K · 15+ YOE
Rockville, Maryland, United States · Hybrid
Specialist V, Pressure Vessels Tanks
Full Time · $131K-$218K · 15+ YOE
Rockville or United States · Onsite
Lead Estimator
Full Time · $97K-$161K · 7+ YOE
Rockville, Maryland, United States · Onsite
Specialist V, Heat Exchanger
Full Time · $109K-$182K · 15+ YOE
Rockville, Maryland, United States · Onsite
I&C Systems Engineer
Full Time · $88K-$204K · 15+ YOE
Oak Ridge, Tennessee, United States · Onsite
Materials Engineer (Creep & High Temp Metallics Design)
Full Time · $98K-$163K · 5+ YOE
Rockville, Maryland, United States · Onsite
Team Lead Process Engineer - Waste & Recovery
Full Time · $135K-$171K · 7+ YOE
Oak Ridge, Tennessee, United States · Onsite
Engineer IV/V, Civil Structural
Full Time · $115K-$217K
Rockville, Maryland, United States · Hybrid
Engineer - Facility & Utility Design
Full Time · $116K-$187K · 5+ YOE
Oak Ridge, Tennessee, United States · Onsite
Manager, Probabilistic Risk Assessment
Full Time · $180K-$228K · 10+ YOE
Rockville, Maryland, United States · Onsite
Engineer V, Risk Informed Safety Analysis
Full Time · $135K-$225K · 15+ YOE
Rockville, Maryland, United States · Hybrid
Engineer IV, Plant & Process Design
Full Time · $125K-$198K · 10+ YOE
Rockville, Maryland, United States · Onsite
Engineer IV, Microreactor Systems
Full Time · $124K-$206K · 10+ YOE
Rockville, Maryland, United States · Onsite
Engineer III, Systems
Full Time · $103K-$171K
Rockville, Maryland, United States · Onsite
Plant Cyber Security Engineer III (Remote)
Full Time · $126K-$161K · 5+ YOE
Rockville, Maryland, United States · Remote
Subcontracts Administrator IV
Full Time · $99K-$155K · 10+ YOE
Oak Ridge, Tennessee, United States · Onsite
Administrator III, Product Lifecycle Management System
Full Time · $97K-$161K · 5+ YOE
Rockville, Maryland, United States · Remote
Engineer IV, Systems
Full Time · $136K-$174K · 10+ YOE
Rockville, Maryland, United States · Onsite
Lead, Mechanical Engineering (Reactor Internals)
Full Time · $146K-$185K · 7+ YOE
Rockville, Maryland, United States · Onsite
Cyber Security Engineer III (ICS/OT)
Full Time · $126K-$161K · 5+ YOE
Oak Ridge, Tennessee, United States · Onsite

About X-energy

Activities
Nuclear reactor designNuclear fuel manufacturingEnergy technology developmentNuclear engineering servicesClean energy generation
HeadquartersUS
Industries
Nuclear EnergyEnergy Technology
NameX-energy
Employees1,771
TypePrivate
Subsidiaries
TRISO-XXe-100 CanadaX-energy UK Holdings
TaglineDevelops advanced small modular nuclear reactors and fuel technology.
Founded2,009
Websitex-energy.com
Latest Funding RoundSeries D
Latest Funding Year2,025
Latest Funding Amount700,000,000
Latest Investors
Ares Management