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Senior Mechanical Systems Engineer Jobs (NOW HIRING)

Mechanical Systems Engineer

Esmond, IL · On-site

$87K - $154K/yr

The Mechanical Systems Engineer position is based out of our Byron Clean Energy facility in Byron ... This Engineering role can be filled at Entry level, Mid-level or Senior Engineer level. Please see ...

Senior Mechanical Engineer

Peoria, IL · On-site

$102K - $135K/yr

Senior Mechanical Engineer - Manufacturing Peoria, IL + Relocation Assistance $120,000 - $150,000 ... systems, supplying critical infrastructure projects across North America. They have built an ...

Sr. Mechanical Engineer

Germantown, MD · On-site

$106K - $140K/yr

Job Title: Sr. Mechanical Engineer Department: Engineering Location: Germantown, MD FLSA Status ... Lead mechanical design of systems, assemblies, and components using CAD software (SolidWorks, CATIA ...

Sr. Mechanical Engineer

Germantown, MD · On-site

$106K - $140K/yr

Job Title: Sr. Mechanical Engineer Department: Engineering Location: Germantown, MD FLSA Status ... Lead mechanical design of systems, assemblies, and components using CAD software (SolidWorks, CATIA ...

Mechanical Systems Engineer

Polo, IL · On-site

$122K - $154K/yr

The Mechanical Systems Engineer position is based out of our Byron Clean Energy facility in Byron ... This Engineering role can be filled at Entry level, Mid-level or Senior Engineer level. Please see ...

Mechanical Systems Engineer

Chana, IL · On-site

$87K - $154K/yr

The Mechanical Systems Engineer position is based out of our Byron Clean Energy facility in Byron ... This Engineering role can be filled at Entry level, Mid-level or Senior Engineer level. Please see ...

Mechanical Systems Engineer

Seward, IL · On-site

$122K - $154K/yr

The Mechanical Systems Engineer position is based out of our Byron Clean Energy facility in Byron ... This Engineering role can be filled at Entry level, Mid-level or Senior Engineer level. Please see ...

Mechanical Systems Engineer

Polo, IL · On-site

$122K - $154K/yr

The Mechanical Systems Engineer position is based out of our Byron Clean Energy facility in Byron ... This Engineering role can be filled at Entry level, Mid-level or Senior Engineer level. Please see ...

Showing results 41-60

Senior Mechanical Systems Engineer information

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$74.5K

$122.6K

$171K

How much do senior mechanical systems engineer jobs pay per year?

As of Sep 4, 2026, the average yearly pay for senior mechanical systems engineer in the United States is $122,564.00, according to ZipRecruiter salary data. Most workers in this role earn between $104,500.00 and $138,000.00 per year, depending on experience, location, and employer.

What does a senior mechanical systems engineer do?

A Senior Mechanical Systems Engineer is responsible for designing, developing, and overseeing complex mechanical systems and components in various industries such as aerospace, automotive, or manufacturing. They lead engineering teams, manage projects, and ensure that systems meet performance, safety, and quality standards. Their role often includes analyzing system requirements, troubleshooting issues, and collaborating with other engineering disciplines to deliver integrated solutions. Additionally, they may mentor junior engineers and contribute to product innovation and continuous improvement initiatives.

What are the key skills and qualifications needed to thrive as a senior mechanical systems engineer?

To thrive as a Senior Mechanical Systems Engineer, you need advanced knowledge of mechanical engineering principles, systems integration, and a relevant engineering degree, often accompanied by a Professional Engineer (PE) license. Proficiency in CAD software (such as SolidWorks or AutoCAD), simulation tools like ANSYS, and experience with project management systems are typically required. Strong analytical thinking, leadership, and effective communication are crucial soft skills that distinguish top performers in this role. These skills are essential for designing complex systems, leading multidisciplinary teams, and ensuring project success from concept to implementation.

What types of cross-functional collaboration can a senior mechanical systems engineer expect in their daily work?

As a Senior Mechanical Systems Engineer, you will frequently collaborate with multidisciplinary teams, including electrical engineers, software developers, project managers, and manufacturing specialists. This collaboration is essential for integrating mechanical components with other system elements, resolving design challenges, and ensuring that projects meet performance, safety, and cost requirements. Regular meetings, design reviews, and problem-solving sessions are typical, making strong communication and teamwork skills crucial for success in this role.

What is the difference between Senior Mechanical Systems Engineer vs Mechanical Design Engineer?

AspectSenior Mechanical Systems EngineerMechanical Design Engineer
CredentialsBachelor's or Master's in Mechanical Engineering, professional certifications (e.g., PE)Bachelor's or Master's in Mechanical Engineering, some certifications beneficial
Work EnvironmentSystems integration, project management, cross-disciplinary collaborationDesign development, CAD modeling, prototype testing
Industry UsageEngineering firms, manufacturing, aerospace, automotiveProduct design, manufacturing, R&D departments
Search & ComparisonOften compared for experience level and responsibilitiesCompared for design focus and technical skills

The Senior Mechanical Systems Engineer typically oversees complex systems integration and project management, requiring broader experience. In contrast, the Mechanical Design Engineer focuses on designing and developing mechanical components. Both roles require strong engineering credentials and are common in manufacturing and aerospace industries, but they differ in scope and responsibilities.

How much do senior mechanical systems engineers get paid?

Senior mechanical systems engineers typically earn between $90,000 and $130,000 annually, depending on experience, location, and industry. They often require strong skills in CAD software, systems analysis, and project management, with salaries increasing with certifications and specialized expertise.
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What cities are hiring for Senior Mechanical Systems Engineer jobs?

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What states have the most Senior Mechanical Systems Engineer jobs?

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What job categories do people searching Senior Mechanical Systems Engineer jobs look for?

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Infographic showing various Senior Mechanical Systems Engineer job openings in the United States as of August 2026, with employment types broken down into 1% As Needed, 85% Full Time, 9% Part Time, 4% Contract, and 1% Nights. Highlights an 90% Physical, 2% Hybrid, and 8% Remote job distribution, with an average salary of $122,564 per year, or $58.9 per hour.

Mechanical Systems Engineer

Constellation Energy

Davis Junction, IL • On-site

$122K - $154K/yr

Other

Medical, Dental, Vision, Life, Retirement, PTO

Re-posted 26 days ago


Constellation Energy rating

8.6

Company rating: 8.6 out of 10

Based on 101 frontline employees who took The Breakroom Quiz

12th of 87 rated oil and gas companies


Job description

Who We Are

As the largest private-sector power producer in the world and the nation's largest producer of clean and reliable energy, Constellation is focused on our purpose: lighting the way to a brilliant tomorrow for all. We have been the leader in clean energy production for more than a decade, and we are cultivating a workplace where our employees can grow, thrive, and contribute. Now integrated with Calpine, our portfolio includes 55 gigawatts of capacity from nuclear, natural gas, geothermal, hydro, wind and solar facilities, with the generating capacity to power the equivalent of 27 million homes.

The Mechanical Systems Engineer position is based out of our Byron Clean Energy facility in Byron, IL.


Our culture and employee experience make it clear: We are powered by passion and purpose. Together, we're creating healthier communities and a cleaner planet, and our people are the driving force behind our success. At Constellation, you can build a fulfilling career with opportunities to learn, grow and make an impact. By doing our best work and meeting new challenges, we can accomplish great things. Join us in meeting the country's energy needs today and tomorrow.

Total Rewards

Constellation offers an extensive selection of benefits and rewards to help our employees thrive professionally and personally. We provide competitive compensation and a wide-range of benefits that support both employees and their families, helping them prepare for the future. In addition to highly competitive salaries, eligible employees are offered a bonus program, 401(k) with company match, employee stock purchase program comprehensive medical, dental and vision benefits, including robust wellbeing programs disability and life insurance benefits paid time off for vacation, holidays, and sick days and much more.

*****************This Engineering role can be filled at Entry level,  Mid-level or Senior Engineer level. Please see minimum qualifications list below for each level*********************************** 

Entry Level - $87,000

Mid Level - $92,700-$114,000 

Sr Level - $122,400-$154,000 

Ranges are per year based on experience, along with a comprehensive benefits package that includes bonus and 401K 

Primary Purpose of Position

Responsible for performing engineering and technical tasks, under general supervision, in support of nuclear plant operations.

Primary Duties and Accountabilities

  • Perform engineering and technical tasks as assigned by supervision applying general engineering principles
  • Assure all engineering products prepared are in accordance with applicable safety analyses, industry codes, engineering specifications and all regulatory requirements.
  • Participate in the development and implementation of effective processes and techniques at appropriate levels of detail and in compliance with established policies and procedures.
  • Recommend format and methodology improvements to standard processes and procedures.
  • Perform other job assignments and duties as directed by management or pursuant to company policy, including but not limited to emergency response, departmental coverage, call outs, and support of outage activities in positions outside the department.

MINIMUM QUALIFICATIONS for Entry Level E01 Engineer &ndash New Graduate 

  • B.S  in Engineering (Chemical, Civil/Structural, Electrical, Industrial, Mechanical or Nuclear) 
  • Maintain minimum access requirements or unescorted access requirements, as applicable, and favorable medical examination and/or testing in accordance with position duties

MINIMUM QUALIFICATIONS for Mid-level E02 Engineer

  • B.S. in Engineering, a minimum 2 years Nuclear experience or related engineering experience
  • Must meet additional requirements as outlined in ANSI/ANS-3.1-2014 Standard, "Selection, Qualification, and Training of Personnel for Nuclear Power Plants"
  • Maintain minimum access requirements or unescorted access requirements, as applicable, and favorable medical examination and/or testing in accordance with position duties

MINIMUM QUALIFICATIONS for Senior E03 Engineer

  • B.S. in Engineering, a minimum 5 years Nuclear experience or related engineering experience
  • Must meet additional requirements as outlined in ANSI/ANS-3.1-2014 Standard, "Selection, Qualification, and Training of Personnel for Nuclear Power Plants"
  • Maintain minimum access requirements or unescorted access requirements, as applicable, and favorable medical examination and/or testing in accordance with position duties

Preferred Qualifications

  • BS Mechanical, Civil, Industrial or Chemical Engineering
  • Engineer in Training Certification
  • Good grasp of techniques and a good understanding of the fundamental functions performed by the group. As responsibility increases within the organization
  • Experience with raw water systems
  • Nuclear power plant experience

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