El Segundo, California, United States · On-site
$140k–$190k/yr
Forge Atomics Humanity faces two critical challenges: securing reliable energy and aggressively lowering our environmental impact. At Forge, we believe nuclear fission is the key to solving both at once. Today Forge is d…
Skills: Fluid systems design, Mechanical engineering, Fluids analysis, Technical leadership, Trade studies
El Segundo, California, United States · On-site
$115k–$150k/yr
Forge Atomics Humanity faces two critical challenges: securing reliable energy and aggressively lowering our environmental impact. At Forge, we believe nuclear fission is the key to solving both at once. Today Forge is d…
Skills: Design For Manufacturability, CNC Programming, CAM Workflows, Geometric Dimensioning And Tolerancing, Root Cause Analysis
El Segundo, California, United States · On-site
$118k–$225k/yr
Date Posted: 2026-07-17 Country: United States of America Location: US-CA-EL SEGUNDO-R01 ~ 2000 E Imperial Hwy ~ BLDG R01 Position Role Type: Onsite U.S. Citizen, U.S. Person, or Immigration Status Requirements: The abil…
Skills: Electronic Packaging, ANSI Drawing Standards, GD&T, CREO, 3D Solid Modeling
El Segundo, California, United States · On-site
IESE Solutions is seeking Aerospace Systems Engineers to support the U.S. Space Forces mission of delivering warfighter capability via the Space Systems Command (SSC) directorates. Positions are available in El Segundo, …
Skills: Systems Engineering, Systems Integration, Model-Based System Engineering, Agile Development, DevOps
El Segundo, California, United States · On-site
$75k–$125k/yr
A New Paradigm For Space Operations. Who We Are: Space Kinetic is a dual use space technology startup building a completely new architecture for space operations – one that brings the advantages of proliferated drone tec…
Skills: Thermal Analysis, Hardware Design, Passive Thermal Control, Active Thermal Control, TVAC Testing
El Segundo, California, United States · On-site
$195k–$220k/yr
A New Paradigm For Space Operations. Who We Are: Space Kinetic is a dual use space technology startup building a completely new architecture for space operations – one that brings the advantages of proliferated drone tec…
Skills: Mechanical Design, 3D CAD, GD&T, Tolerance Stack-up Analysis, Design For Manufacturing
El Segundo, California, United States · On-site
$100k–$130k/yr
Amca is building America’s new industrial base. Since the 1990s, our ability to build new aviation and military systems and maintain the ones we already have has eroded. Today, the gap between what the nation needs to pr…
Skills: 3D CAD, GD&T, Fluid Dynamics, Hydraulics, Pneumatics
El Segundo, California, United States · On-site
$150k–$250k/yr
Amca is building America’s new industrial base. Since the 1990s, our ability to build new aviation and military systems and maintain the ones we already have has eroded. Today, the gap between what the nation needs to pr…
Skills: Magnetic Design, Electromagnetic Analysis, FEA, ANSYS Maxwell, Thermal Analysis
El Segundo, California, United States · On-site
$150k–$250k/yr
Amca is building America’s new industrial base. Since the 1990s, our ability to build new aviation and military systems and maintain the ones we already have has eroded. Today, the gap between what the nation needs to pr…
Skills: Fluid Dynamics, Hydraulics, Pneumatics, 3D CAD, GD&T
El Segundo, California, United States · On-site
$150k–$250k/yr
Amca is building America’s new industrial base. Since the 1990s, our ability to build new aviation and military systems and maintain the ones we already have has eroded. Today, the gap between what the nation needs to pr…
Skills: Test Rig Design, Fluid Dynamics, Data Acquisition, Hydraulic Systems, Pneumatic Systems
El Segundo, California, United States · On-site
$100k–$130k/yr
Amca is building America’s new industrial base. Since the 1990s, our ability to build new aviation and military systems and maintain the ones we already have has eroded. Today, the gap between what the nation needs to pr…
Skills: Test Rig Construction, Data Acquisition, Fluid Mechanics, Instrumentation, Hydraulic Systems
El Segundo, California, United States · On-site
$91k–$184k/yr
Mechanical Systems Design & Analysis Engineer (Thermal) - (Associate, Experienced, or Lead) Company: The Boeing Company Come work for Boeing Satellite Systems at the El Segundo Satellite Development Center in Los Angeles…
Skills: Thermodynamics, Heat Transfer, Thermal Analysis, System Engineering, Thermal Desktop
El Segundo, California, United States · On-site
$162k–$242k/yr
RELOCATION ASSISTANCE: Relocation assistance may be available CLEARANCE REQUIRED FOR START: Yes CLEARANCE TYPE: Top Secret TRAVEL: Yes, 10% of the TimeDescription At Northrop Grumman, our employees have incredible opport…
Skills: Systems Engineering, Functional Management, Project Planning, Earned Value Management, Performance Measurement Baseline
El Segundo, California, United States · On-site
$91k–$184k/yr
Mechanical Systems Design & Analysis Engineer (Thermal) - (Associate, Experienced, or Lead) Company: The Boeing Company Come work for Boeing Satellite Systems at the El Segundo Satellite Development Center in Los Angeles…
Skills: Thermodynamics, Heat Transfer, Thermal Analysis, System Engineering, Thermal Desktop
El Segundo, California, United States · On-site
$146k–$239k/yr
Systems Engineer - Digital Signal Processing (Lead or Senior) Company: The Boeing Company Boeing Defense, Space & Security is seeking Lead or Senior DSP Systems Engineers to join the Space and Launch Engineering team in …
Skills: Digital Signal Processing, RF Systems Design, Optical Communication Systems, Fixed-point Architecture, Link Budgets
El Segundo, California, United States · On-site
$146k–$239k/yr
Systems Engineer - Digital Signal Processing (Lead or Senior) Company: The Boeing Company Boeing Defense, Space & Security is seeking Lead or Senior DSP Systems Engineers to join the Space and Launch Engineering team in …
Skills: Digital Signal Processing, RF Systems Design, Optical Communication Systems, Fixed-point Architecture, Link Budgets
El Segundo, California, United States · On-site
$151k–$227k/yr
The Aerospace Corporation is the trusted partner to the nation’s space programs, solving the hardest problems and providing unmatched technical expertise. As the operator of a federally funded research and development ce…
Skills: Space Domain Awareness, Space Control, Systems Engineering, Engineering Program Management, Satellite Communications
El Segundo, California, United States · On-site
$162k–$242k/yr
RELOCATION ASSISTANCE: Relocation assistance may be available CLEARANCE REQUIRED FOR START: Yes CLEARANCE TYPE: Top Secret TRAVEL: Yes, 10% of the TimeDescription At Northrop Grumman, our employees have incredible opport…
Skills: Systems Engineering, Functional Management, Project Planning, Earned Value Management, Performance Measurement Baseline
El Segundo, California, United States · On-site
$146k–$239k/yr
Lead or Senior Satellite Systems Ground Systems Engineer Company: The Boeing Company The Boeing Space & Mission Systems MILSATCOM Program is seeking a Lead or Senior Ground Systems Engineer to develop our nation’s next g…
Skills: Systems Engineering, Ground System Integration, System Verification, Interface Design, Requirements Analysis
El Segundo, California, United States · On-site
$146k–$239k/yr
Lead or Senior Satellite Systems Ground Systems Engineer Company: The Boeing Company The Boeing Space & Mission Systems MILSATCOM Program is seeking a Lead or Senior Ground Systems Engineer to develop our nation’s next g…
Skills: Systems Engineering, Ground System Integration, System Verification, Interface Design, Requirements Analysis
Forge Atomics Inc.
El Segundo, California, United States • On-site
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Design and deploy complex fluid, piping, and plumbing systems for nuclear reactors optimized for reliability and manufacturability. Lead technical efforts, perform detailed fluids analysis, and mentor junior engineers while supporting reactor test campaigns.
Requires a Bachelor's degree in mechanical engineering and at least 5 years of experience designing and building mechanical hardware. Preference is given to candidates with a track record of technical leadership in high-reliability fluid or thermal systems.
Humanity faces two critical challenges: securing reliable energy and aggressively lowering our environmental impact. At Forge, we believe nuclear fission is the key to solving both at once. Today Forge is developing the technology to rapidly scale the deployment of nuclear fission.
As a fluids engineer at Forge, you'll be responsible for designing hardware to manage the complex network of fluids, piping, and plumbing required to operate a nuclear reactor. Fluids engineers at Forge will be responsible for designing tightly packaged fluid systems optimized for low cost, ease of manufacturability, and ultra-high reliability in a nuclear environment with challenging access. Sr. Fluids Engineers will own the most complex fluid systems while setting the technical bar for the fluids engineering team. Successful candidates will have previously demonstrated extreme ownership in designing, testing and delivering complex and high reliability fluid systems.
Design, build and deploy fluid systems to support rapid reactor build and test timelines
Perform detailed fluids analysis to characterize and troubleshoot expected design performance
Work closely with our in-house build shop to develop and own the scaling of the manufacturing line for your system
Support critical reactor test campaigns & operations, provide troubleshooting and technical support
Develop and maintain detailed timelines to capture and communicate project progress
Make high-value decisions on the fly, use feedback to continuously iterate and develop both product and process
Provide training and mentorship to junior fluids engineers, setting the standard for technical rigor across the team
Bachelor's degree in mechanical engineering or a related technical discipline
5+ years of engineering experience designing, analyzing, and building mechanical hardware
Strong interpersonal and collaborative skills, enthusiasm for problem solving, and desire to enable abundant clean energy
5+ years of experience designing and analyzing fluid systems via professional work experience, project/research-based student experience, or a combination of both
Experience acting as a technical lead — scoping work, reviewing designs and processes, and guiding other engineers to successful outcomes
Ability to perform trade studies and make clear recommendations using first principles and engineering fundamentals even with partial information
Experience working at a nimble engineering organization or in a highly technical position that required a scrappy, entrepreneurial manner to accomplish tasks with tight time or budget constraints
Hands-on experience with fluid, gas, or thermal systems
Experience using test instrumentation and control components (e.g. pressure transducers, thermocouples, resistance temperature detectors, relays, solenoid valves, etc.)
Experience designing highly integrated and complex fluid systems in high reliability environments
Position will be based in the South Bay area of Los Angeles County and will require relocation if not already local. The position will be full-time in the office.
Ability to work extended hours and weekends as necessary
Ability to travel to reactor construction sites in other states as necessary
Pay range:
Senior: $140,000.00 - $190,000.00/per year
Your actual level and base salary will be determined on a case-by-case basis and may vary based on the following considerations: job-related knowledge and skills, education, and experience.
Base salary is just one part of your total rewards package at Forge. You may also be eligible for long-term incentives, in the form of company stock or stock options, as well as potential discretionary bonuses and the ability to purchase additional stock at a discount through an Employee Stock Purchase Plan. You will also receive access to comprehensive medical, vision, and dental coverage, access to a 401(k) retirement plan, paid vacation, paid parental leave, and various other perks. Employees accrue paid sick leave pursuant to Company policy which satisfies or exceeds the accrual, carryover, and use requirements of the law.
Forge is an Equal Opportunity Employer; employment with Forge is governed on the basis of merit, competence and qualifications and will not be influenced in any manner by race, color, religion, gender, national origin/ethnicity, veteran status, disability status, age, sexual orientation, gender identity, marital status, mental or physical disability or any other legally protected status.
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.
Based on 567 listings with disclosed salaries, most science & research jobs in El Segundo, CA pay between $99k–$225k per year. Individual offers vary with seniority, company size, and specialization.
There are currently 603 open science & research positions in El Segundo, CA listed on Clera. New openings are added daily as companies post roles.
Companies currently hiring include Boeing, The Aerospace Corporation, Varda Space Industries, Northrop Grumman, CHAOS Industries, among others. Browse the listings above to see every active employer.
Yes — 48 of the 603 open science & research positions offer remote or hybrid work (10 remote, 38 hybrid).
Each listing links directly to the employer's application page. Apply early — fresh listings get the most recruiter attention in the first two weeks.
