Jobs in the United States

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Added 6 mins ago
Spaceflight Propulsion Engineer - Mid-Career (BT-26210)
Bastion Technologies
Houston, TX
The Spaceflight Propulsion Engineer - Mid-Career will support the space program located in Houston, TX.
Added 2 hours ago
Civil/Structural Engineer I
Mesa Brand
Chattanooga, TN
Mesa seeks a mid-level Engineer that will coordinate, prepare, and check calculations, specifications, reports, design details, plans, and drawings within assigned task areas. They help…
Added 2 hours ago
Senior Geotechnical Engineer - Kiewit Infrastructure Engineers
Kiewit
Westlake, TX
Kiewit is seeking a Senior Geotechnical Engineer to work on engineering assignments in support of Kiewit Corporation’s business. The KIE geotechnical group supports all market types and…
Added 2 hours ago
Licensed Civil/Structural Engineer - Mid/Senior Level
Richard Design Services, Inc.
Houston, TX
We are seeking a skilled and motivated Mid/Senior Level, Licensed Civil/Structural Engineer to be part of our team at our Houston office.
Added 3 hours ago
Software Product Pre Sales Engineer Senior Manager - FinCrime
Accenture LLP Company
NY
Deliver tailored product demonstrations to mid-level and senior client stakeholders, translating features into business value.
Added 5 hours ago
Engineer IV
General Atomics
Poway, CA
We have an exciting opportunity in Poway, CA for an Airframe Engineer in our Airframe Integrity Group at GA-ASI. Under general supervision with limited review, this position is responsible…
Added 5 hours ago
Mechanical Design and Analysis Engineer (Solar Array and Battery)– Satellites Systems
The Boeing Company
El Segundo, CA
The Integrated Design Engineering Organization is seeking a highly motivated Satellite Solar Array and Battery Mechanical Design Engineer, Mid-Career or Senior level, to join the Space…
Added 18 hours ago
Systems Engineer (Systems Engineering Engineer-General)
The Boeing Company
Richardson, TX
Boeing Defense, Space & Security is seeking a Senior/Mid-Level Systems Engineer to join our Advanced Airborne Sensor (AAS) In-Service and Project Engineering team located in Richardson, TX.…
Added 20 hours ago
Architect - Industrial Buildings
Kiewit
Lone Tree, CO
Kiewit is hiring for several Senior level and Lead Architects to join our team to deliver design solutions for a diverse range of industrial buildings across multiple market sectors. In…
Added 20 hours ago
TV
Senior / Mid-Level Data Engineer
Team Velocity Marketing
Remote, United States
- From $120,000 USD / year
We are seeking a Senior / Mid-Level Data Engineer to help build and scale the data platform that powers analytics, business intelligence, machine learning, and customer-facing products…
Added 1 day ago
J
Structural Engineer -- PE Licensure
Jobot
Columbus, OH
- $110,000 to $160,000 USD / year
This is an opportunity for a mid-level or senior engineer to contribute to structural design, take ownership of project assignments, and help strengthen client relationships. Candidates…
Added 1 day ago
Lead, Mechanical Engineer (Thermal) - Space Optics
L3Harris
Palm Bay, FL
L3Harris is seeking an experienced and highly accomplished Lead Thermal Engineer to lead spacecraft‑level thermal design, modeling, and analysis activities for advanced space based…
Added 1 day ago
Manufacturing Engineer
ZF Group
Marshall, IL
Requires average level supervision contact from Principal Engineer and/or manager
Added 1 day ago
Lead, Full Stack Engineer
TransUnion LLC
Crum Lynne, PA
Added 1 day ago
T
Automation Engineer (Control-z)
TEKsystems
Pittsburgh, PA
- $50 to $55 USD / hour
This position is best suited for a Mid-Level Control-M Administrator or Workload Automation Engineer with approximately 3-7 years of experience supporting enterprise automation and…
Added 1 day ago
Senior Professional, Electrical Engineering
WSP
Buffalo, NY
5 to 7 years of relevant post education experience as an electrical engineer providing design deliverables for large capital projects.
Added 1 day ago
Design Engineer II
SIG SAUER
Tualatin, OR
Position Summary: The Design Engineer II is responsible for developing new optics and/or accessories as well as managing legacy product improvements. They will exercise sound engineering…
Added 1 day ago
Electro-Optical/Infrared Signature Analyst Engineer (Mid-Level or Senior)
The Boeing Company
Berkeley, MO
…organization is seeking an Electro-Optical/Infrared Signature Analyst Engineer (Mid-Level or Senior) to join the Phantom Works team located in St. Louis,…
Added 1 day ago
Associate Principal/Principal, Structural Engineering
Simpson Gumpertz & Heger
NY
Mentor and develop junior and mid-level staff, supporting their technical and professional development.
Added 1 day ago
Senior Electrical Engineer (Renewables)
WSP
Houston, TX · Boulder, CO · Buffalo, NY · Austin, TX
Provides high degree of technical expertise in design, engineering, and guidance for multi-site/phase due diligence, investigation, remediation, impact assessment, permitting, design,…
Added 1 day ago
Industrial Engineer - Associate or Experienced
Boeing Aerospace Operations
Jacksonville, FL
Summary pay range – Mid-Level: 100,300 - 135,700
Added 1 day ago
Safety Engineer/Specialist
Idaho Environmental Coalition
Idaho Falls, ID
Salary Grade: 14 Salary Range Min $68,395 Mid $87,800 Max $107,210
Added 1 day ago
EL
Structural Associate Principal
ECS Ltd
Hanover, MD
- $105,000 to $150,000 USD / year
ECS is seeking a Structural Associate Principal to join our Mid-Atlantic Building Science & Infrastructure team in Baltimore, MD. In this role, you will manage structural consulting…
Added 1 day ago
Senior Lead Substation Project Engineer
WSP
Meridian, ID · Boise, ID · Reno, NV · Billings, MT · Salt Lake City, UT
…investigation, remediation, impact assessment, permitting, improvement, design, development, and construction of utility, industrial, and commercial scale projects in the public and private…
Added 1 day ago
Data Engineer, Expert
Pacific Gas And Electric Company
Oakland, CA
The engineer will design and implement robust ELT pipelines using Snowflake, Airflow, Informatica, and a suite of AWS services including Step Functions, Fargate, Lambda, DynamoDB, and S3.…

L3Harris

Lead, Mechanical Engineer (Thermal) - Space Optics

Palm Bay, FL, United States

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Job details

Posting language: English
Posted: Sep 18, 2026

Original job description

L3Harris is dedicated to recruiting and developing high-performing talent who are passionate about what they do. Our employees are unified in a shared dedication to our customers’ mission and quest for professional growth. L3Harris provides an inclusive, engaging environment designed to empower employees and promote work-life success. Fundamental to our culture is an unwavering focus on values, dedication to our communities, and commitment to excellence in everything we do.

L3Harris is the Trusted Disruptor in defense tech. With customers’ mission-critical needs always in mind, our employees deliver end-to-end technology solutions connecting the space, air, land, sea and cyber domains in the interest of national security.

Job Title: Lead, Mechanical Engineer (Thermal) – Space Optics

Job Code: 44597

Job Location: On-site in Palm Bay, FL or Fort Wayne, IN

Job Schedule: 9/80: Employees work 9 out of every 14 days- totaling 80 hours worked- and have every other Friday off

Relocation: Relocation assistance is available to qualified applicants

Job Description:

L3Harris is seeking an experienced and highly accomplished Lead Thermal Engineer to lead spacecraft‑level thermal design, modeling, and analysis activities for advanced space based electro-optical missions. This role is responsible for architecting and validating thermal solutions that ensure mission success across multiple orbital environments. The ideal candidate is a recognized technical expert capable of driving complex spacecraft thermal strategy, mentoring engineers, and collaborating across multidisciplinary teams.

Essential Functions:

Serve as the technical lead for spacecraft‑level thermal design, defining architecture, strategies, and requirements for high‑reliability space vehicles.
Develop detailed thermal models and analyses for all mission phases, including worst‑case hot/cold environments, eclipse conditions, orbital variations, and mission‑specific scenarios.
Lead creation and validation of thermal control hardware - including radiators, coatings, heat pipes, surface finishes, insulation, heaters, and conductive interfaces.
Own thermal performance budgets and flow‑down of requirements to payloads, avionics, structures, and propulsion subsystems.
Evaluate thermal impacts of system trades, configuration changes, power profiles, and operational timelines.
Direct development of thermal math models using industry-standard tools such as Thermal Desktop, SINDA/FLUINT, ESATAN‑TMS, or equivalent.
Provide leadership during spacecraft hardware build, integration, and test - including thermal vacuum (TVAC) planning, execution, anomaly resolution, and correlation of test results to analysis.
Guide environmental considerations for space platforms including radiation, conduction, convection-free behavior, material properties, surface degradation, and mission life effects.
Act as a cross-functional leader, collaborating closely with systems engineering, mechanical design, power, RF, digital hardware, manufacturing, and mission assurance teams.
Mentor junior and mid‑level engineers, establishing best practices and driving continuous improvement in thermal engineering processes.
Prepare high‑quality documentation including thermal requirements, analysis reports, review packages, test plans, and verification matrices.
Ability to obtain a US security clearance

Qualifications:

Bachelor of Science Degree in Engineering and a minimum of 9 years of prior relevant experience. Graduate Degree in Engineering and a minimum of 7 years of prior related experience. In lieu of a degree, minimum of 13 years of prior related experience.
5+ years professional experience using Thermal Desktop
Prior or current professional experience with thermal design and analysis for space environment/products
2+ years of experience as an IPTL or providing technical leadership to an engineering team

Preferred Additional Skills:

Experience designing for a space environment.
Hold a current security Clearance or the ability to obtain a security clearance
Deep understanding of spacecraft materials, thermal coatings, MLI, conductive interfaces, and active thermal control elements.
Demonstrated success in developing, validating, and correlating thermal models to TVAC results.
Ability to lead design reviews, guide complex decision-making, and communicate clearly with customers, leadership, and engineering teams.
Experience working on government, DoD, or national security space missions.
Knowledge of mission-specific environments such as GEO, LEO, cislunar, or deep space.
Broad knowledge of thermal-fluids physics including heat conduction and convection of multi-phase flows
Experience creating and overseeing the development of thermal testing control logic in SINDA/FLUENT
Familiarity with structural-thermal-optical (STOP) analysis, deployment mechanism thermal behavior, or thermal considerations in RF/high‑power payloads.
Experience with reliability assessments, derating, and long‑duration thermal performance modeling.

L3Harris Technologies is proud to be an Equal Opportunity Employer. L3Harris is committed to treating all employees and applicants for employment with respect and dignity and maintaining a workplace that is free from unlawful discrimination. All applicants will be considered for employment without regard to race, color, religion, age, national origin, ancestry, ethnicity, gender (including pregnancy, childbirth, breastfeeding or other related medical conditions), gender identity, gender expression, sexual orientation, marital status, veteran status, disability, genetic information, citizenship status, characteristic or membership in any other group protected by federal, state or local laws. L3Harris maintains a drug-free workplace and performs pre-employment substance abuse testing and background checks, where permitted by law.

Please be aware many of our positions require the ability to obtain a security clearance. Security clearances may only be granted to U.S. citizens. In addition, applicants who accept a conditional offer of employment may be subject to government security investigation(s) and must meet eligibility requirements for access to classified information.

By submitting your resume for this position, you understand and agree that L3Harris Technologies may share your resume, as well as any other related personal information or documentation you provide, with its subsidiaries and affiliated companies for the purpose of considering you for other available positions.

L3Harris Technologies is an E-Verify Employer. Please click here for the E-Verify Poster in English (https://www.e-verify.gov/sites/default/files/everify/posters/EVerifyParticipationPoster.pdf) or Spanish (https://www.e-verify.gov/sites/default/files/everify/posters/EVerifyParticipationPoster.pdf) . For information regarding your Right To Work, please click here for English (https://www.eeoc.gov/sites/default/files/2022-10/22-088_EEOC_KnowYourRights_10_20.pdf) or Spanish (https://www.eeoc.gov/sites/default/files/2022-10/22-088_EEOC_KnowYourRightsSp_10_20.pdf) .

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