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Mechanical Engineer 3 Jobs (NOW HIRING)

Sayres Defense

Mechanical Engineer III

Philadelphia, PA · On-site

$80K - $120K/yr

Sayres is seeking Mechanical Engineer III with ability to obtain secret clearance in in Philadelphia PA. This is a significant engineering and technical support effort tied to the Navy's propulsion ...

Sayres Defense

Mechanical Engineer III

Philadelphia, PA · On-site

$80K - $120K/yr

Sayres is seeking Mechanical Engineer III with ability to obtain secret clearance in in Philadelphia PA. This is a significant engineering and technical support effort tied to the Navy's propulsion ...

System One

Mechanical Engineer III

Perry, OH · On-site

$52/hr

Mechanical Engineer III Location: Perry, OH Type: Contract Compensation: $52.00 - DOE Contractor Work Model: Onsite - onsite Hours: 40 hours/week Security Clearance: Must be a US Citizen due to ...

System One

Mechanical Engineer III

Perry, OH · On-site

$52/hr

Mechanical Engineer III Location: Perry, OH Type: Contract Compensation: $52.00 - DOE Contractor Work Model: Onsite - onsite Hours: 40 hours/week Security Clearance: Must be a US Citizen due to ...

System One

Mechanical Engineer III

Perry, OH · On-site

$52/hr

Mechanical Engineer III Location: Perry, OH Type: Contract Compensation: $52.00 - DOE Contractor Work Model: Onsite - onsite Hours: 40 hours/week Security Clearance: Must be a US Citizen due to ...

System One

Mechanical Engineer III

Perry, OH · On-site

$52/hr

Mechanical Engineer III Location: Perry, OH Type: Contract Compensation: $52.00 - DOE Contractor Work Model: Onsite - onsite Hours: 40 hours/week Security Clearance: Must be a US Citizen due to ...

Tekberry

Mechanical Engineer III

Wilmington, NC · On-site

$50 - $57/hr

Mechanical Engineer III Pay Rate Range: $50.00 - 57.00 /hr DOE Employment Type: Contract Duration: Approximately 6+ Months (Potential Extension) Schedule: Full-Time | 40+ Hours per Week | Monday ...

System One

Mechanical Engineer III

Perry, OH · On-site

$52/hr

Mechanical Engineer III Location: Perry, OH Type: Contract Compensation: $52.00 - DOE Contractor Work Model: Onsite - onsite Hours: 40 hours/week Security Clearance: Must be a US Citizen due to ...

System One

Mechanical Engineer III

Perry, OH · On-site

$52/hr

Mechanical Engineer III Location: Perry, OH Type: Contract Compensation: $52.00 - DOE Contractor Work Model: Onsite - onsite Hours: 40 hours/week Security Clearance: Must be a US Citizen due to ...

System One

Mechanical Engineer III

Perry, OH · On-site

$52/hr

Mechanical Engineer III Location: Perry, OH Type: Contract Compensation: $52.00 - DOE Contractor Work Model: Onsite - onsite Hours: 40 hours/week Security Clearance: Must be a US Citizen due to ...

System One

Mechanical Engineer III

Perry, OH · On-site

$52/hr

Mechanical Engineer III Location: Perry, OH Type: Contract Compensation: $52.00 - DOE Contractor Work Model: Onsite - onsite Hours: 40 hours/week Security Clearance: Must be a US Citizen due to ...

System One

Mechanical Engineer III

Perry, OH · On-site

$52/hr

Mechanical Engineer III Location: Perry, OH Type: Contract Compensation: $52.00 - DOE Contractor Work Model: Onsite - onsite Hours: 40 hours/week Security Clearance: Must be a US Citizen due to ...

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All JobsMechanical Engineer 3 Jobs

Mechanical Engineer 3 information

See salary details

$45.5K

$102.9K

$166.5K

How much do mechanical engineer 3 jobs pay per year?

As of Jul 25, 2026, the average yearly pay for mechanical engineer 3 in the United States is $102,878.00, according to ZipRecruiter salary data. Most workers in this role earn between $81,500.00 and $126,500.00 per year, depending on experience, location, and employer.

What are the key skills and qualifications needed to thrive as a Mechanical Engineer 3, and why are they important?

To thrive as a Mechanical Engineer 3, you need a solid background in mechanical design, problem-solving, and engineering analysis, typically with a bachelor’s degree in mechanical engineering and several years of experience. Familiarity with CAD software (such as SolidWorks or AutoCAD), finite element analysis tools, and project management systems is often required, along with relevant certifications like a PE license. Strong communication, teamwork, and project leadership skills help you effectively collaborate and mentor junior engineers. These capabilities are crucial for delivering high-quality engineering solutions and managing complex projects efficiently.

What does mechanical engineer 3 mean?

A Mechanical Engineer 3 is a mid- to senior-level engineering position that typically requires several years of experience, advanced technical skills, and possibly a bachelor's or master's degree in mechanical engineering. This level often involves leading projects, designing systems, and applying specialized tools like CAD software. Salary and responsibilities increase with experience and expertise in the field.

How does a Mechanical Engineer 3 typically collaborate with cross-functional teams during project development?

As a Mechanical Engineer 3, you'll frequently work with cross-functional teams such as electrical engineers, manufacturing specialists, and project managers to ensure all design aspects align with overall project goals. This collaboration often involves participating in design reviews, providing technical input, and coordinating with other departments to resolve integration challenges. Effective communication and teamwork are essential, as you'll be expected to both guide junior engineers and consult with senior staff. Your ability to manage interdisciplinary feedback and maintain project timelines will be key to your success in this role.

Can you make $200,000 a year as a mechanical engineer?

Mechanical engineers can earn $200,000 or more annually, typically with extensive experience, advanced skills, and work in high-paying industries such as aerospace, oil and gas, or specialized consulting. Achieving this salary often requires senior-level positions, professional certifications, and sometimes managerial responsibilities.

What are Mechanical Engineer 3s?

A Mechanical Engineer 3 is a mid- to senior-level mechanical engineering professional who typically has several years of experience in designing, developing, testing, and overseeing the manufacturing of mechanical devices or systems. They are often responsible for complex engineering projects, providing technical guidance to junior engineers, and ensuring that designs meet safety, quality, and regulatory standards. Mechanical Engineer 3s may also be involved in project management, process optimization, and collaboration with cross-functional teams to deliver solutions. Their role requires strong analytical skills, proficiency with engineering software, and a solid understanding of mechanical principles.

What is the difference between Mechanical Engineer 3 vs Mechanical Engineer 2?

CriteriaMechanical Engineer 3Mechanical Engineer 2
Required CredentialsBachelor's degree in Mechanical Engineering; Professional Engineer (PE) license often preferredBachelor's degree in Mechanical Engineering; PE license may be optional
Work EnvironmentDesign, analysis, testing in manufacturing, automotive, aerospace industriesSimilar environments, often with more supervision or entry-level tasks
Employer & Industry UsageUsed across engineering firms, manufacturing companies, and government agenciesCommonly used in the same sectors, typically for less experienced roles

Mechanical Engineer 3 typically has more experience, responsibilities, and often a PE license, compared to Mechanical Engineer 2. The role involves more complex projects and independent work, whereas Mechanical Engineer 2 may focus on supporting tasks under supervision.

What engineers make $300,000 a year?

Senior-level mechanical engineers with extensive experience, advanced skills, and often specialized expertise in areas like aerospace, robotics, or energy can earn $300,000 or more annually. High compensation typically involves leadership roles, bonuses, or working in high-demand industries with complex projects and certifications such as Professional Engineer (PE).

What engineer makes $500,000 a year?

Highly experienced senior engineers in specialized fields such as petroleum, aerospace, or software engineering can earn $500,000 or more annually, often through a combination of base salary, bonuses, and stock options. These roles typically require advanced skills, extensive experience, and often involve leadership or executive responsibilities.
More about Mechanical Engineer 3 jobs
What cities are hiring for Mechanical Engineer 3 jobs? Cities with the most Mechanical Engineer 3 job openings:
What states have the most Mechanical Engineer 3 jobs? States with the most job openings for Mechanical Engineer 3 jobs include:
What job categories do people searching Mechanical Engineer 3 jobs look for? The top searched job categories for Mechanical Engineer 3 jobs are:
Mechanical Engineer 3 jobs near you
Infographic showing various Mechanical Engineer 3 job openings in the United States as of July 2026, with employment types broken down into 1% As Needed, 69% Full Time, 26% Part Time, 1% Temporary, and 3% Contract. Highlights an 95% Physical, 2% Hybrid, and 3% Remote job distribution, with an average salary of $102,878 per year, or $49.5 per hour.
Mechanical Engineer III

Mechanical Engineer III

Sterling Engineering Inc.

Worcester, MA

$136K - $189K/yr

Contractor

Medical, Dental, Vision, Retirement, PTO

Posted 23 days ago

Job description

Title: Mechanical Engineer III / Principal Mechanical Engineer
Company: Sterling Engineering
Location: Portland, ME; Worcester, MA; Plymouth, MA
Hire Type: Direct Hire or Contract-to-Hire
Compensation: $136,000 - $189,000 based on experience


Overview: Sterling Engineering is partnering with a growing engineering organization seeking an experienced Mechanical Engineer III or Principal Mechanical Engineer to provide technical leadership and engineering expertise on complex industrial, infrastructure, utility, and energy-related projects. This role will support LNG, RNG, natural gas transmission, and distribution projects while leading engineering activities from planning and design through project execution. The ideal candidate will be a licensed Professional Engineer with strong project leadership skills, technical expertise, and experience working in multidisciplinary engineering environments.

Key Responsibilities:
• Lead the planning, design, and execution of engineering projects while maintaining quality, efficiency, and safety standards.
• Provide technical leadership and oversight for engineering projects and disciplines.
• Conduct field visits, site assessments, and construction coordination activities.
• Review engineering designs, calculations, specifications, reports, and supporting documentation for technical accuracy and compliance.
• Identify project risks, engineering issues, and deficiencies while implementing corrective actions and solutions.
• Participate in proposal preparation, project planning, budgeting support, and scope development.
• Coordinate with internal teams, contractors, vendors, clients, and regulatory agencies throughout project execution.
• Support project scheduling, forecasting, cost tracking, and resource planning activities.
• Mentor and provide technical guidance to engineers, designers, drafters, and field personnel.
• Support quality assurance and quality control initiatives.
• Assist with recruiting, onboarding, training, and development of engineering staff.
• Drive continuous improvement initiatives, engineering best practices, and technology enhancements.

Qualifications:
• Minimum 10 years of progressive engineering experience.
• Experience supporting industrial, infrastructure, construction, manufacturing, utility, or energy-related projects.
• Strong knowledge of LNG, RNG, natural gas transmission, and distribution systems preferred.
• Field, operations, commissioning, maintenance, or construction experience strongly preferred.
• Demonstrated leadership experience directing engineering teams and multidisciplinary project efforts.
• Experience developing project scopes, technical proposals, cost estimates, and project budgets.
• Strong problem-solving, organizational, communication, and project management skills.
• Ability to effectively communicate technical information to clients, stakeholders, and project teams.
• Valid driver's license required for project-related travel and field work.

Education/Certifications:
• Bachelor's Degree in Mechanical Engineering required.
• Master's Degree in Engineering, Business, or related field preferred.
• Professional Engineer (PE) License required.

Technical Skills:
• Microsoft Office Suite
• Advanced knowledge of mechanical engineering principles, methods, standards, and practices

Benefits:
Insurance (Medical, Dental, Vision), PTO, 401(k) Plan

Qualified applicants will receive consideration for employment without regard to race, color, age, religion, sex, sexual orientation, gender identity, national origin, disability, protected veteran status, or genetic information.