Thermodynamics jobs in Clayton, MO

Mechanical Systems Design & Analysis Engineer (Experienced or Senior)

Berkeley, Missouri

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Today

Job Description At Boeing, we innovate and collaborate to make the world a better place. We?re committed to fostering an environment for every teammate that?s welcoming, respectful and inclusive, with great opportunity for professional growth. Find your future with us. The Boeing Test Operations and Engineering (TO&E) team in Berkeley, Missouri is seeking Mechanical Systems Design & Analysis Engineers to join our Instrumentation Installation Design group supporting flight test programs. In this

Full-time

Compensation information provided in the description

Mechanical Engineer 1 (Entry Level) - Energy & Industrial (January 2027)

Clayton, Missouri

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Today

Responsibilities This position has a targeted start date of January 2027. This position will offer you the ability to directly apply your knowledge of thermodynamics, heat transfer, and fluid mechanicsYou will be involved in the system engineering aspects of power plant engineering and oil & gas engineering, including the design, modification, and analysis of mechanical systemsYou will be working within project teams with other Mechanical Engineers, focused on preparing engineering deliverables

Full-time

USD 62,998.00 - 90,586.00 per year

SUPERVISORY ARCHITECT/ENGINEER (TITLE 32)

Scott Air Force Base, Illinois

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Today

Summary THIS IS A NATIONAL GUARD TITLE 32 EXCEPTED SERVICE POSITION. This National Guard position is for a SUPERVISORY ARCHITECT/ENGINEER (TITLE 32), Position Description Number D1552000 and is part of the IL 126, National Guard. Learn more about this agency Duties Help As a SUPERVISORY ARCHITECT/ENGINEER (TITLE 32), GS-0810-13, you will performs long term planning and organizational development necessary to accomplish architecture and engineering functions for programs essential to state

Full-time

USD 109,137.00 - 141,880.00 per year

Senior Product Development Engineer

St. Louis, Missouri

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Today

Working at Watlow Watlow is a global technology and manufacturing leader who provides world class engineering expertise through innovative thermal products and systems, enabling our customers to thrive. We are making a positive impact every day as our solutions enrich the lives of people everywhere. We have been providing breakthrough thermal solutions for over 100 years! Our corporate values guide us uncompromisingly to always do the right thing, continually learn and improve, respect everyone,

Full-time

Mechanical Engineering New Graduate | St. Louis, MO

St. Louis, Missouri

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Today

Mechanical Engineering New Graduate | St. Louis, MO 100% Employee-Owned | Big-firm resources, local-team relationships, ONE IMEG culture This posting is for Winter 2026 New Graduate opportunities. IMEG is hiring a Mechanical Engineering New Graduate in St. Louis, MO, to support the analysis, design, and implementation oversight of mechanical systems for the vertical building industry. This entry-level role offers hands-on design, analysis, and project execution experience, with mentorship, tr

Full-time

Senior Simulation Driven Development Engineer - US

St. Louis, Missouri

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Today

Full-time

Mechanical Project Engineer | St. Louis, MO

St. Louis, Missouri

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Today

Mechanical Project Engineer | St. Louis, MO 100% Employee-Owned | Big-firm resources, local-team relationships, ONE IMEG culture IMEG is hiring a Mechanical Project Engineer in St. Louis, MO, to lead design efforts as a project manager or lead engineer for low to moderate complexity projects and support the delivery of larger and high complexity work with senior staff. This role focuses on engineering analysis, design, and implementation oversight of mechanical systems for the vertical building

Full-time

Mechanical Systems Design & Analysis Engineer (Experienced or Senior)

Berkeley, Missouri

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Today

Mechanical Systems Design & Analysis Engineer (Experienced or Senior) Company: The Boeing Company The Boeing Test Operations and Engineering (TO&E) team in Berkeley, Missouri is seeking Mechanical Systems Design & Analysis Engineers to join our Instrumentation Installation Design group supporting flight test programs. In this team, a design engineer has the primary responsibility for the synthesis of requirements, creation of engineering definition, 3D models, 2D drawings, and model-based def

Full-time

USD 126,650.00 - 171,350.00 per year

Lead Mechanical Engineer 2 - Nuclear

Remote

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Today

Responsibilities You will be involved in nuclear power plant systems design, including preparation or review of: Modification packages for operating nuclear power plantsFunctional mechanical drawings and/or drawings for nuclear power plant systemsEngineering analyses and evaluations to support modifications and operation of plant systemsTechnical specifications and procurement documents for plant equipmentVendor bid evaluations for plant equipmentStudies and options evaluations for modification

Full-time

USD 134,546.00 - 205,557.00 per year

Lead Mechanical Engineer 1 - Nuclear

Remote

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Today

Full-time

USD 118,023.00 - 180,313.00 per year

Senior Mechanical Engineer 1 - Nuclear

Remote

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Today

Full-time

USD 84,762.00 - 129,498.00 per year

RF Mechanical Engineer I (Onsite)

Remote or Tucson, Arizona

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Today

Date Posted: 2026-09-28 Country: United States of America Location: US-AZ-TUCSON-M02 ~ 1151 E Hermans Rd ~ BLDG M02 Position Role Type: Onsite U.S. Citizen, U.S. Person, or Immigration Status Requirements: Active and transferable U.S. government issued security clearance is required prior to start date.Security Clearance Type: DoD Clearance: Secret Security Clearance Status: Ability to obtain INTERIM U.S. government issued security clearance is required prior to start date Are you ready

Full-time

USD 57,200.00 - 108,800.00 per year

Lead HRSG Application Engineer

Remote

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Today

Job Description Summary The Heat Recovery Steam Generator (HRSG) Application Engineer owns global, project-specific proposal activity to drive consistent functional specifications and standardized workflow processes for outsourced HRSG scopes. This role requires a strong understanding of gas turbine combined cycle power plant applications - including HRSG and water-steam cycle application engineering - with the ability to translate plant-level requirements into detailed functional specifications

Full-time

USD 98.00 per hour

Senior Mechanical Engineer 2 - Nuclear Plant Analysis

Remote

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Today

Responsibilities This position will offer you the ability to directly apply your knowledge of thermodynamics, heat transfer, fluid mechanics, and experience in power plant engineeringYou will be preparing or reviewing calculations, evaluations, and technical reports to support client recommendations and reviews, and will additionally conduct equipment sizing, optimization evaluation, and selection in response to client needsWhile supporting clients and project teams with other Mechanical Engine

Full-time

USD 100,019.00 - 152,807.00 per year

Senior Mechanical Engineer 1 - Nuclear Plant Analysis

Remote

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Today

Full-time

USD 84,762.00 - 129,498.00 per year

Mechanical Engineer Consultant 2 (Nuclear Plant Analysis) - Nuclear

Remote

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Today

Responsibilities Our electric power generation clients are seeking to increase the power output of their existing power plants to meet the electric demands. This is expanding work in the Mechanical Analysis Engineering group. You will work on major systems, equipment and plant process in the following areas: Develop and lead licensing basis system and component evaluations for nuclear power uprate projects.This position will offer you the ability to directly apply your knowledge of thermodynami

Full-time

USD 145,310.00 - 222,001.00 per year

Lead Mechanical Engineer 2 (Nuclear Plant Analysis) - Nuclear

Remote

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Today

Full-time

USD 134,546.00 - 205,557.00 per year

Lead Mechanical Engineer 1 (Nuclear Plant Analysis) - Nuclear

Remote

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Today

Full-time

USD 118,023.00 - 180,313.00 per year

Propulsion Engineer - Solid

Remote or Folsom, California

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Today

Voyager is an innovative space, defense, and national security technology company committed to advancing and delivering transformative, mission-critical solutions. We tackle the most complex challenges to unlock new frontiers for human progress, fortify national security, and protect critical assets to lead in the race for technological and operational superiority from ground to space. Forge the Future: Join Voyager Technologies The future belongs to those who build it. At Voyager Technologies

Full-time

USD 103,000.00 - 218,000.00 per year

Lead Mechanical Engineer 1 - Mission Critical

Remote

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Today

Responsibilities This is a lead-level engineering position that offers a variety of challenging opportunities in Mechanical Engineering and will provide an excellent opportunity for career advancement. Lead Mechanical design engineering efforts on a multi-disciplined project design team and apply mechanical engineering expertise to the design and analysis of special purpose equipment, pressure vessels, and interfacing systems, controls, and structural support elementsPrepare and review complex

Full-time

USD 118,023.00 - 180,313.00 per year

Thermodynamics jobs in Clayton, MO, USA