Principal Mechanical Engineer jobs in Massachusetts

Quincy, Massachusetts

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Today

Job Description: Saab Inc., Autonomous and Undersea Systems division is seeking an innovative and experienced Principal Mechanical Engineer to guide others on technical teams in capturing, understanding, and implementing product design requirements for autonomous Unmanned Surface/Underwater Vehicles (aUSVs/aUUVs, AUVs) and Remotely Operated Vehicles (ROVs). This position will sit in our Quincy, MA or Cranston, RI facilities. Responsibilities: Ability to serve as the lead contributor for the res

Full-time

Compensation information provided in the description

Principal Mechanical Engineer

Quincy, Massachusetts

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Today

Full-time

Compensation information provided in the description

Principal Mechanical Engineer

Marlborough, Massachusetts

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Today

Date Posted: 2026-03-09 Country: United States of America Location: US-MA-MARLBOROUGH-MA1 ~ 1001 Boston Post Rd ~ BLDG 1 Position Role Type: Onsite U.S. Citizen, U.S. Person, or Immigration Status Requirements: The ability to obtain and maintain a U.S. government issued security clearance is required.Security Clearance Type: DoD Clearance: Secret Security Clearance Status: Active and existing security clearance required after day 1 At Raytheon, the foundation of everything we do is rooted in

Full-time

USD 107,500.00 per year

Senior Principal Mechanical Engineer

Marlborough, Massachusetts

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Today

Date Posted: 2026-02-03 Country: United States of America Location: US-MA-MARLBOROUGH-MA1 ~ 1001 Boston Post Rd ~ BLDG 1 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 At Raytheon,

Full-time

USD 132,400.00 per year

SD&I - Sr. Principal Mechanical Engineer

Marlborough, Massachusetts

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Today

Date Posted: 2026-01-29 Country: United States of America Location: US-MA-MARLBOROUGH-MA1 ~ 1001 Boston Post Rd ~ BLDG 1 Position Role Type: Onsite U.S. Citizen, U.S. Person, or Immigration Status Requirements: The ability to obtain and maintain a U.S. government issued security clearance is required.Security Clearance Type: DoD Clearance: Secret Security Clearance Status: Active and existing security clearance required after day 1 At Raytheon, the foundation of everything we do is rooted in

Full-time

USD 132,400.00 per year

Principal Mechanical Engineer - Cooling Systems

Marlborough, Massachusetts

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Today

Date Posted: 2026-02-23 Country: United States of America Location: US-MA-MARLBOROUGH-MA1 ~ 1001 Boston Post Rd ~ BLDG 1 Position Role Type: Onsite U.S. Citizen, U.S. Person, or Immigration Status Requirements: The ability to obtain and maintain a U.S. government issued security clearance is required.Security Clearance Type: DoD Clearance: Secret Security Clearance Status: Active and existing security clearance required after day 1 At Raytheon, the foundation of everything we do is rooted in

Full-time

USD 107,500.00 per year

Sr Principal Mechanical Engineer - CCB Chair

Tewksbury, Massachusetts

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Today

Date Posted: 2026-02-24 Country: United States of America Location: US-MA-TEWKSBURY-TB1 ~ 50 Apple Hill Dr ~ ASSABET BLDG Position Role Type: Remote U.S. Citizen, U.S. Person, or Immigration Status Requirements: The ability to obtain and maintain a U.S. government issued security clearance is required.Security Clearance Type: DoD Clearance: Secret Security Clearance Status: Active and existing security clearance required after day 1 At Raytheon, the foundation of everything we do is rooted i

Full-time

USD 132,400.00 per year

Principal Mechanical Engineer - Air Traffic Solutions (Onsite)

Marlborough, Massachusetts

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Today

Date Posted: 2026-03-27 Country: United States of America Location: US-MA-MARLBOROUGH-MA3 ~ 1001 Boston Post Rd ~ BLDG 3 Position Role Type: Onsite U.S. Citizen, U.S. Person, or Immigration Status Requirements: Security Clearance Type: None/Not Required Security Clearance Status: Not Required Join a team whose impact stretches across the world, and even beyond! Collins Aerospace, an RTX company, is a leader in advanced technologically and intelligent solutions for the global aerospace and de

Full-time

USD 107,500.00 per year

2026 ADGE Principal Mechanical Engineer - On-Site

Tewksbury, Massachusetts

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Today

Date Posted: 2026-02-18 Country: United States of America Location: US-MA-TEWKSBURY-TB1 ~ 50 Apple Hill Dr ~ ASSABET BLDG Position Role Type: Onsite U.S. Citizen, U.S. Person, or Immigration Status Requirements: The ability to obtain and maintain a U.S. government issued security clearance is required.Security Clearance Type: DoD Clearance: Secret Security Clearance Status: Active and existing security clearance required after day 1 At Raytheon, the foundation of everything we do is rooted i

Full-time

USD 107,500.00 per year

Principal Electro-Mechanical Engineer (Remote)

Remote or Massachusetts

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Today

Date Posted: 2026-02-20 Country: United States of America Location: US-MA-REMOTE Position Role Type: Remote U.S. Citizen, U.S. Person, or Immigration Status Requirements: The ability to obtain and maintain a U.S. government issued security clearance is required.Security Clearance Type: DoD Clearance: Secret Security Clearance Status: Active and existing security clearance required after day 1 At Raytheon, the foundation of everything we do is rooted in our values and a higher calling - to he

Full-time

USD 107,500.00 per year

Principal Systems/Mechanical Design Engineer

Remote

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Today

At Jabil (NYSE: JBL), we are proud to be a trusted partner for the world's top brands, offering comprehensive engineering, supply chain, and manufacturing solutions. With 60 years of experience across industries and a vast network of over 100 sites worldwide, Jabil combines global reach with local expertise to deliver both scalable and customized solutions. Our commitment extends beyond business success as we strive to build sustainable processes that minimize environmental impact and foster vib

Full-time

USD 126,100.00 - 227,000.00 per year

Mechanical Principal Engineer - AI Technologies

Franklin, Massachusetts

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Today

Mechanical Principal Engineer - AI Technologies Thermal / Mechanical Engineering leads and delivers the development of innovative and compliant mechanical design solutions, as well as cross-functional interfaces for datacenter and server computer systems and peripherals. Our team conducts the analysis, feasibility studies and testing of mechanical products, instruments, subassemblies and packaging for new and existing products - and then oversees the introduction of design changes to the manuf

Full-time

USD 145,000.00 - 187,000.00 per year

Principal Process Mechanical / Wastewater Engineer

Remote or Tampa, Florida

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Today

Arcadis is the world's leading company delivering sustainable design, engineering, and consultancy solutions for natural and built assets. We are more than 36,000 people, in over 70 countries, dedicated to improving quality of life. Everyone has an important role to play. With the power of many curious minds, together we can solve the world's most complex challenges and deliver more impact together. Role description: Arcadis is looking for a Principal Process Mechanical / Wastewater Engineer

Full-time

USD 113,933.00 - 193,686.00 per year

Sr. Principal Mechanical Integration Engineer - Data Center Liquid Cooling (REMOTE)

Remote or Austin, Texas

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Today

Full-time

USD 164,200.00 - 295,600.00 per year

Lead, Mechanical Engineer

Massachusetts

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Today

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 Trus

Full-time

USD 122,000.00 - 227,000.00 per year

Aero Equipment ITR Lead Mechanical Engineer

Remote or Houston, Texas

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Today

Job Description Summary GE Vernova is looking for highly motivated individuals to join the Aero Equipment ITR engineering team. GE Vernova Gas Power is a growing and exciting business encompassing all Aero Derivatives Gas Turbines and Power Plants enabling renewable penetration through grid firming, decarbonizing and electrifying the world. The Aero Equipment ITR Lead Mechanical Engineer will be part of a team tasked to deliver wing-to-wing customer solutions for Aeroderivative Gas Turbine Gene

Full-time

USD 98,400.00 - 164,000.00 per year

Lead Mechanical Engineer 1 (Power Uprates) - Nuclear

Remote

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Today

Description 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 nuclear industry. You will work on major systems, equipment and plant process in the following areas: Perform consulting level work for power uprates in the nuclear industry.Interface with clients and project teams to present technical discussions and project status.Develop engineering proposals and cost estimates.M

Full-time

USD 116,620.00 - 179,890.00 per year

Lead Mechanical Engineer 1 (Nuclear Plant Analysis) - Nuclear

Remote

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Today

Description 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 thermodynamics, h

Full-time

USD 116,620.00 - 179,890.00 per year

Lead Mechanical Engineer 2 (Nuclear Plant Analysis) - Nuclear

Remote

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Today

Description 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 thermodynamics, h

Full-time

USD 131,960.00 - 205,330.00 per year

Lead generator mechanical engineer (Hydroelectric industry)

Remote

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Today

Job Description Summary Job Description The Lead Generator Mechanical Engineer will be responsible for the design of hydro generator mechanical components for installed based projects. He/she will also be responsible to provide technical support for supply chain and site activities related to hydro generators. About Us: We are a purpose-built company leading a new era of energy - electrifying the world while simultaneously working to help decarbonize it! Our culture is built on inclusivity,

Full-time

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Principal Mechanical Engineer jobs in Massachusetts, USA