Mechanical Engineer Job Descriptions, Average Salary, Interview Questions

What Does a Mechanical Engineer Do?

Mechanical engineers design, develop, and test mechanical systems, machines, and devices. The principles of physics and materials science are applied to develop and improve products and processes across a wide range of industries, including automotive, aerospace, energy, and manufacturing.

A mechanical engineer designs and develops new products, improves existing products, conducts tests and simulations, and supervises the production and implementation of mechanical systems.

Computer-aided design (CAD) software and other tools are used by mechanical engineers to design detailed products and processes, and they work closely with other engineers, technicians, and stakeholders to ensure that the designs are cost-effective, safe, and perform well. Mechanical engineers play a crucial role in the advancement of technology and the solution of complex engineering challenges across a variety of industries.

Are you a job seeker?

Browse zengig’s
comprehensive list
of job openings
and apply online

National Average Salary

Mechanical engineer salaries vary by experience, industry, organization size, and geography. To explore salary ranges by local market, please visit our sister site

The average U.S. salary for a Mechanical Engineer is:


Mechanical Engineer Job Descriptions

When it comes to recruiting a mechanical engineer, having the right job description can make a big difference. Here are some real world job descriptions you can use as templates for your next opening.

Example 1

Mechanical engineers design, build, and test various mechanical devices, such as industrial machines, transportation systems, and robotics equipment. They analyze problems with various machinery and develop effective solutions. They use CAD technology to design and develop new products. Mechanical engineers need a strong foundation in mechanics, thermodynamics, and other mechanical engineering concepts, as well as solid math problem-solving, and critical thinking skills. [Your Company Name] is hiring an experienced mechanical engineer. If you are highly creative and have experience working on production cycles from research and design to manufacturing, installation, and evaluation, you might be a perfect fit for a role as a mechanical engineer.

Typical duties and responsibilities

  • Analyze problems to see how mechanical and thermal devices might help solve them
  • Design or redesign mechanical and thermal devices or subsystems, using analysis and computer-assisted design
  • Investigate equipment issues to diagnose faults and recommend solutions
  • Develop and test prototypes of devices they design
  • Analyze the test results and change the design or system as needed
  • Oversee the manufacturing process for the device
  • Train technicians in using devices

Education and experience

This position requires a bachelor’s degree in mechanical engineering. Some employers prefer a master’s degree or Ph.D. for certain jobs or career advancement.

Required skills and qualifications

  • Analytical, problem-solving and critical-thinking skills
  • Firm grasp of engineering concepts, and experience designing mechanical systems and products
  • Advanced mathematics skills
  • Teamwork and interpersonal communication skills
  • Strong technical writing ability
  • Experience with database and spreadsheet software
  • Skill in working with engineering and computer-assisted design software
  • Demonstrated expertise in solving complex technical problems

Preferred qualifications

  • Bachelor’s in mechanical engineering or manufacturing
  • 2+ years of mechanical engineering experience
  • Knowledge of lean manufacturing and statistical problem solving

Example 2

Scope of role:

The Mechanical Engineer will work directly with other engineers, technicians, managers, and production personnel. This individual will perform detailed mechanical design/analysis, prototyping, and a variety of troubleshooting efforts. In addition, this person will be responsible for advancing and improving the mechanical technology used in our products. The individual will utilize working and analytical knowledge of various mechanical engineering techniques associated with form, fit, and function in specified operational environments.

A basic understanding of tool design and material flow characteristics will be required as important considerations in product design. Regular communication with other engineers and technicians is necessary to promote a close-knit, flexible, and highly adaptive engineering team. In that vein, the Mechanical Engineer must also use a basic understanding of electrical applications in order to ensure all mechanical designs are suitable for product integration.

Essential duties:

  • Provide support to the design, development, prototype fabrication, and verification testing of our products and production equipment
  • Perform detailed system and sub-system analysis, simulation, and design work as required
  • Work with complicated mechanical system concepts and detailed designs to properly determine the necessary design tradeoffs
  • Participate in the assembly, system test planning, and system test procedure generation for first articles or first piece builds
  • Serve as a project engineer/manager leading all phases of project management
  • Develop project charters, scope statements, schedules, plans, requirements documents, and other project documentation
  • Manage integration, communications, scope, budget, schedule, procurement, resources, quality, and risk
  • Assist in advising management of new developments and innovative ideas which may affect profit, schedule, costs, customer relations, and/or inter-departmental relations in a timely manner
  • Assist in forecasting costs associated with the use of materials and engineering services
  • Support technical proposal generation. Write white papers to document the application of new technologies for development of new products, or improvements to existing products
  • Adequately document processes, procedures and testing using structured formats. Where format do not currently exist, provide a recommended format for review
  • Learn and utilize the Quality Management System (QMS). Update the QMS when changing work instructions, forms, documents or procedures
  • Interface with external customers as required, to support corporate goals and objectives. Solicit new business and provide technical customer service as needed or required
  • Continually search for and make recommendations to improve design and process efficiencies and reduce supply chain costs
  • Judiciously source components for new designs, balancing the trade-offs between cost, quality, and lead time
  • Research and analyze internal and customer design proposals, specifications, manuals, and other data to evaluate the feasibility, cost, and maintenance requirements of designs or applications
  • Specify system components or direct modification of products to ensure conformance with engineering design and performance specifications
  • Design test control apparatus and equipment and develop procedures for testing products

Education and experience:

  • Bachelor’s degree in Mechanical Engineering
  • Minimum of 2 years of increasing relevant work experience using 3-D modeling software. Our ideal will be 5 years of experience
  • Experience working directly with a customer to understand and interpret needs and specifications is preferred
  • Minimum of one year experience working on a project that used formal Project Management techniques. Experience as a project manager desired but not required
  • Knowledge of raw materials, production processes, quality control, costs, and other techniques for maximizing the effective manufacture and distribution of goods

Other skills and abilities:

  • Build and maintain a strong working knowledge of our products and the industries we serve as well as current and novel technologies related to mechanical engineering (including competitive technologies)
  • Study industrial processes to determine where and how application of our products can be made
  • Strong written and oral communication skills
  • Strong initiative and an eagerness to learn
  • Attention to detail and strong organizational skills
  • Exceptional time management
  • Proficient in the use of Microsoft Office (Excel, WORD and PowerPoint)
  • Ability to use hand tools and lift 35 pounds

Example 3

The Mechanical Engineer will utilize engineering knowledge in the development of centrifugal pump products and their application and generate engineering documentation for both standard and special customer applications. Also, must assist the engineering department with drawing, document, and bill material control and revision.

Key responsibilities:

  • Applies theory and principles of mechanical design to modify, test, and develop, centrifugal pumps, pump components, and systems
  • Produces approval drawing as per internal and customer specification
  • Produces drawings and models based upon current engineering projects
  • Creates new or revised bill of materials as per internal or customer specifications
  • Provides product and application expertise where required
  • Reviews customer application documents ensuring technical requirements are documented properly and understood
  • Assistants in the establishment and enforcement, as needed, engineering procedures, standards, and best practices
  • Generates required engineering calculations as per application and design requirements
  • Assists and advises production in the proper manufacture of engineering designs
  • Establishes and maintains close working relationships with Sales, Operations, Quality, and other functions. Promotes and maintains flexible, cooperative, team-oriented, and customer focuses attitudes within and between functions
  • Participates in cross-functional teams to ensure continuous, ongoing improvement of processes, methods, and quality
  • Maintains technical competency and remains current in technology and changes in the industries the organization serves

Education and experience

  • Bachelor’s degree in mechanical engineering or equivalent; required
  • 5-7 + years of experience. Specific centrifugal pump and mechanical seal experience; preferred
  • Proficient in the use of SolidWorks or similar 3D CAD software, preferred
  • Familiarity with FEA and CFD simulations preferred
  • Demonstrated problem-solving capability
  • Six Sigma and Lean experience; preferred
  • Flexibility to work different schedules as needed to meet strict deadlines
  • MS Office Suite; required
  • Willingness to travel up to 30% of the time. Domestic and International to support field work, provide technical service, support sales, etc.

You should be proficient in:

  • Finite Element Analysis (FEA)
  • CAD Software

Machines & technologies you’ll use:

  • CAD Software

Example 4

We’re looking for a Mechanical Engineer, who is excited about working on advanced facilities projects that enable the heart of our clients’ business. Join us and you’ll have the chance to work on projects at some of the world’s most state of the art industrial and commercial facilities. You’ll be accountable for schedule and technical quality of challenging engineering tasks, as you gain familiarity with the client’s expectations, scope, budget and schedule.

You’ll also provide on-site assistance during startup, coordinating work activities with other design and engineering professionals and the discipline lead. Your multi-discipline, highly interactive team will successfully deliver on the design, development, application, evaluation, recommendation, and specification of engineered systems and products for building HVAC, Plumbing, and Fire Protection systems and components.

Your role keeps our company connected and we’ll support you with what you need to be successful.  Bring your creativity, ambitious spirit and extreme attention to detail, and we’ll help you grow, pursue and fulfill what drives you – so we can deliver extraordinary solutions for a better tomorrow, together.  

Here’s what you’ll perform

  • Perform conceptual and detailed designs for the Microelectronics and High Technology Industries
  • Design AHUs, MAHs Chillers, Cooling Towers, Water Side and Air Side distribution, VAV’s, HVAC, Process Exhaust, Fire Protection, Mechanical Wet and Dry piping systems
  • Support field construction efforts, including reviewing submittals, responding to questions from clients and contractors, and performing field walks
  • Perform technical and business presentations with clients and employees
  • Perform quality reviews on designs performed by others
  • Participate in the development of proposals, budgets, and schedules for process specific work

Here’s what you’ll need

  • Bachelor’s degree in Mechanical Engineering
  • Professional Engineer (PE)
  • At least 8 years of practical application of Mechanical Engineering, including HVAC, fire protection, plumbing, and related mechanical building systems
  • Strong communication skills both verbal and written
  • Ability to work with and guide designers
  • Strong analytical and problem-solving skills
  • Strong communication skills both verbal and written
  • Experience in utilizing and developing specifications
  • Ability to travel to site as needed
  • Proof of Vaccination Status
  • Live within 4 hours of (City, State)

Ideally, you’ll also have

  • Working knowledge of PipeFlo
  • Forward thinking, eager to learn best practices, and contribute with innovative ideas
  • Displayed ability to learn quickly and driven to broaden knowledge base
  • Ability to collaborate and work effectively in a variety of teams, including multi-disciplinary teams
  • Passion for buildings and construction
  • Familiarity with Revit, AutoCad, and NavisWorks
  • Industrial design experience including pharmaceutical manufacturing, semiconductor facilities, data center, or similar

Candidate Certifications to Look For

  • American Society of Mechanical Engineers (ASME). The ASME is a leader in the global engineering community. They offer a range of certification programs for engineers that provide professional development and a solid foundation for advancing technical knowledge. Certification programs include the Boiler and Pressure Vessel Certification (BPVC), Bioprocessing Equipment Certification (BPE), Nuclear Quality Assurance (NQA-1) Certification, and Parts Fabrication (PRT) Certification. Certifications are awarded based on passing an assessment in a candidate’s program of choice.
  • Fluid Power Hydraulic Specialist (CFPHS). Offered by the International Fluid Power Society, this certification is for professional engineers who design systems involving hydraulic components for mobile and industrial operating machinery. The program tests a candidate’s technical skill level in fluid power and motion control technologies. Certification requires the completion of a 3-hour written test covering the functions of hydraulic components and circuits, how to select components for hydraulic systems, how to analyze and troubleshoot hydraulic systems, and electrohydraulic control systems.  

How to Hire a Mechanical Engineer

There are a number of initial considerations when hiring a mechanical engineer:

  • Recruiting: Do you have the internal resources and tools to successfully source and recruit for this role?
  • Complexity: Does your project require a senior professional, or is a mid- or junior-level inspector sufficient?
  • Duration: Is this a one-time project or a permanent requirement?
  • Management: Do you have the time and expertise to direct the work effort effectively?
  • Urgency: How time-sensitive is this need? What happens if it remains unfilled?
  • Headcount: Do you have room on your team for a new W2 employee, or should you consider alternate options?

Answering these questions will help determine the best course of action for your current hiring need. Fortunately, various great options exist for every scenario, no matter how unique. We recommend the following options when hiring a mechanical engineer:

1. Use 4 Corner Resources (or another professional recruiting firm)

The heavy lifting is done for you when working with a top-tier staffing company like 4 Corner Resources. We source, screen, recruit, and deliver only the most qualified candidate(s), saving you significant time and effort throughout the hiring process while you remain focused on your core business. Understanding your needs and ensuring the right candidate for the position is the key to our success.

This is the best route to take when:

  • You need to fill the position quickly
  • You want access to a vast talent pool of high-quality, prescreened candidates
  • Your position is suited for temporary hiring services, contract staffing, or contract-to-hire recruiting, and you intend to direct the work activity.
  • You are hiring an employee as a direct placement but aren’t able to recruit effectively or efficiently with your internal staff. 
  • You aren’t familiar with current salary rates, market trends, and available skill sets
White 4 Corner Resources banner that says award-winning staffing and recruiting solutions with learn more button

2. Advertise your opening on a top job board

Your best option may be to advertise your opening on a proven job board. There are many widely used job sites out there that draw visits from qualified candidates. If you have someone internally who can dedicate the time and energy to sort through applications and screen individuals effectively, this can be a great choice. 

We recommend using a job board when:

  • Your internal recruiting team has the knowledge and experience to assess candidate qualifications
  • You are hiring a direct employee and have time to manage the entire recruiting effort 
  • You have a process for receiving, screening, and tracking all resumes and applications
  • You are prepared to respond to all applicants

We recommend using CareerBuilder when hiring a mechanical engineer:


CareerBuilder has been a trusted source for hiring since 1995. Reach 80+ million unique, diverse U.S. job seekers annually by posting your jobs through their talent acquisition channels. Through CareerBuilder, you can engage candidates and drive them into your sourcing pipeline. We recommend using CareerBuilder for hiring when you have the internal resources and processes to review, screen, and reply to all applicants.

navy and white CareerBuilder affiliate banner that says post your job and start your free 5-day trial today

3. Leverage your internal resources

You can utilize your own website, social media, and employees to assist in your search for top candidates. 

A company website posting should be the first step in notifying prospective candidates that you are hiring. Social media can also be a powerful tool for spreading the word about your new opening. As far as exposure is concerned, this option can be as good as some job boards when you have a large enough following across various platforms, like LinkedIn, Instagram, Facebook, TikTok, and Twitter.

Current employees are every organization’s greatest asset. Encourage your internal team to promote job openings to their network by offering cash and other incentives.

We recommend these options when:

  • Your brand has great name recognition
  • You can consistently monitor and respond to candidate activity through your website and social media accounts
  • You have a process in place to quickly and broadly communicate job openings and requirements
  • You have an effective employee referral program in place

If you aren’t sure which path is best, schedule a discovery call today with our seasoned recruiting professionals. The 4 Corner team is on standby to help you find the best option for your unique hiring need.

Sample Interview Questions

  • In your experience, what are the most important skills a mechanical engineer should possess, and how have you developed those skills?
  • What is your experience with CAD software, and which tools have you used in the past?
  • What was your most successful engineering project?
  • What process do you use to check for flaws?
  • What is the best way to balance innovation and creativity with practical considerations, such as cost-effectiveness and manufacturing?
  • What is a process flow diagram?
  • What is the difference between fatigue and creep?
  • What is the second law of thermodynamics?
  • How do hydraulic clutches work?
  • In what situation would you use a double pulley?
  • Can you explain what a cotter joint is?
  • Can you explain the difference between a clearance fit, an interference fit, and a transition fit?

Need help hiring a Mechanical Engineer?

We match top professionals with great employers across the country. From filling urgent job openings to developing long-term hiring strategies, our team is here to help. Review our staffing solutions, browse our award-winning Staffing Corner blog, or call today. We look forward to connecting with you soon.

Browse A-Z Job Descriptions