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34 Fermilab Mechanical Engineer Jobs Hiring Near You

The Fermilab Infrastructure Services Division (ISD) is seeking a Principal Mechanical Engineer . This individual is responsible for major, complex, high-level engineering projects requiring ...

Principal Mechanical Engineer

Batavia, IL · On-site

$124K - $164K/yr

The Fermilab Infrastructure Services Division (ISD) is seeking a Principal Mechanical Engineer . This individual is responsible for major, complex, high-level engineering projects requiring ...

The Mechanical Support Department of the Accelerator Division within Fermilab is seeking a Mechanical Thermal Fluids Engineer. Under general directions, this individual will be responsible for ...

Cryogenic Engineering Co-op

Batavia, IL · On-site

$21.26 - $25.93/hr

Under the direction of an expert mechanical engineer, project tasks may include cryogenic component ... Fermilab-Cooperative-Education-Program-Worksheet-Quarter.pdf (fnal.gov) (upload under the resume ...

Cryogenic Engineering Co-op

Batavia, NY · On-site

$21.26 - $25.93/hr

Under the direction of an expert mechanical engineer, project tasks may include cryogenic component ... Fermilab-Cooperative-Education-Program-Worksheet-Quarter.pdf (fnal.gov) (upload under the resume ...

Cryogenic Engineer

Batavia, IL · On-site

$88K - $116K/yr

The Fermilab Applied Superconducting and Technology Division (APS-TD) seeks a staff level Cryogenic ... Master of Science degree in mechanical engineering or a related engineering field, preferred * A ...

The Fermilab Applied Superconducting and Technology Division (APS-TD) seeks a staff level Cryogenic ... Master of Science degree in mechanical engineering or a related engineering field, preferred * A ...

Mechanical Technician III

Batavia, NY · On-site

$28.30 - $34.51/hr

The Fermilab Applied Superconducting and Technology Division (APS-TD) currently seeking a ... Assisting in the design and development of equipment and systems including providing engineering ...

Mechanical Technician III

Batavia, IL · On-site

$28.30 - $34.51/hr

The Fermilab Applied Superconducting and Technology Division (APS-TD) currently seeking a ... Assisting in the design and development of equipment and systems including providing engineering ...

Fermilab is seeking a Senior Electrical PCB Design Drafter within our Power Electronics Systems ... This person will apply extensive knowledge in the preparation of mechanical and electrical designs ...

Fermilab is seeking a Senior Electrical PCB Design Drafter within our Power Electronics Systems ... This person will apply extensive knowledge in the preparation of mechanical and electrical designs ...

Mechanical Technician

Batavia, IL · On-site

$31.13 - $37.96/hr

Fermilab is seeking a Senior Mechanical Technician who is a collaborator by nature. The successful candidate will work with engineers, designers, technicians, and scientists to build parts and ...

Plant Operator

Batavia, IL · On-site

$28.30 - $34.51/hr

... and engineers to perform operational and maintenance activities associated with the mechanical ... Fermilab offers a competitive and comprehensive benefits program, including: * Medical, Dental ...

Fermilab is seeking a Senior Mechanical Technician who is a collaborator by nature. The successful candidate will work with engineers, designers, technicians, and scientists to build parts and ...

Fermilab is seeking a Senior Electronic Mechanical Technician within our Power Supply Maintenance ... Assists in the design and development of equipment and systems including providing engineering ...

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Showing results 1-20

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What are the most popular categories at Fermilab?
Infographic showing various Mechanical Engineer job openings at Fermilab in the United States as of July 2026, with employment types broken down into 91% Full Time, and 9% Part Time. Highlights an 98% Physical, and 2% Hybrid job distribution.

Principal Mechanical Engineer

Fermilab

Batavia, NY

$124K - $164K/yr

Full-time

Medical, Dental, Vision, Life, Retirement, PTO

Re-posted 14 days ago


Fermilab rating

9.1

Company rating: 9.1 out of 10

Based on 9 frontline employees who took The Breakroom Quiz

10th of 120 rated laboratories


Job description

The expected hiring range for this position is:

$124,800.00-$164,200.00.

Please note that the pay range information is a general guideline only. The pay offered to a selected candidate will be determined based on factors such the scope and responsibilities of the position, qualifications of the selected candidate, business considerations, internal equity, and external market pay for comparable jobs.

About the Role:
The Fermilab Infrastructure Services Division (ISD) is seeking a Principal Mechanical Engineer. This individual is responsible for major, complex, high-level engineering projects requiring engineering creativity in developing innovative concepts and techniques. The (ISD) Principal Mechanical Engineer leads and contributes to projects in areas such as design, design review, procurement, manufacture, installation, test, and initial operations of a project with extensive & diversified engineering requirements in compliance with all applicable local, state, and federal regulations, requirements and standards, and all Department of Energy (DOE) orders. This role may oversee sub-contractors or supervise/ manage an engineering group/department.

What your day-to-day as a Principal Mechanical Engineer at Fermilab will look like:

  • Analyze data and perform engineering calculations.
  • Develop specifications, designs, and documents for major and technically complex, high-level, and highly visible engineering projects and design solutions. Work involves a variety of complex and advanced engineering techniques.
  • Plan and/or lead large or complex projects from inception to completion and brings them to operating status. Estimates manpower, schedules work, coordinates and directs technicians.
  • Provide technical direction to draftsmen, designers, engineering associates, technicians, or less senior engineers. Coordinates and/or supervises technicians and other engineers and sub-contractors. May manage the activities of engineering groups or departments.
  • Identify problems or tasks requiring engineering solutions and provides a thorough analysis of alternatives.
  • Participate in procurement, as well as manufacture, installation, testing, and operation.
  • Assist or lead in the development of cost estimates, as well as the monitoring and/or management of budgetary obligations.
  • Review and approve work before hardware and financial resources are committed, ensuring conformance to specifications and cost/time constraints.
  • Enhance the national and international presence of projects or the Lab through participation in and collaboration on project reviews, as well as participation in technical conferences and publication.
  • Serve on safety panels, review committees, and other subcommittees as assigned. May serves as chair of subcommittee(s) or division/section committees.
  • Contribute to setting lab-wide engineering policies, safety standards or technical standards.
  • May provide supervision or leadership of a team including hiring, promotions, performance reviews, training, disciplinary actions, team exits, and other duties as assigned.
  • Perform other duties as assigned by supervisor.
  • Abide by and is responsible for performing all duties in accordance with all environmental, health and safety regulations and practices pertinent to this position.

Essential Skills and Competencies for Succes:

  • Bachelor's in an applicable Engineering discipline from an ABET accredited institution with 8+ years of engineering experience, or a Master's or PhD in an applicable Engineering discipline from an ABET accredited institution with 6+ years of engineering experience.

Applicable Knowledge, Skills and Abilities Required:

  • In-depth knowledge and proficiency in application of theories, concepts, principles, and methodology for the engineering discipline.
  • Possess extensive project planning skills in developing specifications and documents for major and technically complex, high-level, and highly visible engineering projects and engineering design solutions.
  • Ability to perform a variety of complex and advanced engineering techniques.
  • Experience with AutoCAD required, and/or Revit is a plus.
  • Professional Engineer licensure in the State of Illinois is desired.

The successful candidate will have experience in one or more of the following related areas:

  • Design of HVAC Systems
  • Design of piping Systems
  • Design of plumbing systems and code experience
  • HVAC "Controls/DDC" background desired
  • Experience with energy modeling/hvac softwares specially CDS-Trace desired
  • Exposure to Building Commissioning
  • Familiarity with Ashrae requirements and applications desired
  • Working knowledge of building codes related to mechanical systems

Work Arrangement:
Please note that the described work arrangement is subject to change based on business needs and is not guaranteed to be final.

  • Onsite: This is an onsite role, and the candidate must be able to work from our Batavia office.

Benefits/Perks:
Fermilab offers a competitive and comprehensive benefits program, including:

  • Medical, Dental, Vision and Flexible Spending Accounts
  • Paid time off
  • Life insurance
  • Short and Long-term disability insurance
  • Retirement benefits
  • Onsite day care

Why Fermilab:
Fermilab is America's premier laboratory for particle physics and accelerator research, funded by the U.S. Department of Energy. We support discovery science experiments in Illinois and locations around the world, including deep underground mines in South Dakota and Canada, mountaintops in Arizona and Chile, CERN in Europe and the South Pole.

Pre-Employment Screening:


Drug-Free Workplace & Pre-Employment Screening

Fermilab is dedicated to fostering a safe, productive and drug-free environment. An offer of employment is contingent upon the successful completion of a background check and drug screening.

HSPD-12

In accordance with Homeland Security Presidential Directive 12 (HSPD-12) new employees are required to obtain and maintain a HSPD-12 Personal Identity Verification (PIV) Credential. To obtain this credential, new employees must successfully complete and pass a federal background check investigation. This investigation includes a declaration of illegal drug activities, including use, supply, possession, or manufacture. This includes marijuana and cannabis derivatives, which are still considered illegal under federal law, regardless of state laws. Failure to obtain or maintain such government access authorization could result in the withdrawal of a job offer or future termination of employment.

Foreign Government Sponsored Activities

Fermilab employees, and certain guest researchers and contractors, are subject to particular restrictions related to participation in Foreign Government Sponsored or Affiliated Activities, as defined and detailed in United States Department of Energy Order 486.1A. Such individuals will be asked to disclose any participation for review by Fermilab's Office of General Counsel.

REAL-ID Requirement for access to Fermilab Campus
Fermilab requires all members of the public to produce a REAL-ID, or equivalent, to access the Fermilab Campus for interviews or career events. A list of acceptable forms of ID can be found here: https://get-connected.fnal.gov/wp-content/uploads/2021/09/REALID-Documents.pdf. If a candidate is selected for an interview but does not possess any of the equivalent documents, we may schedule a virtual interview.

Equal Opportunity Statement

Fermilab is an equal opportunity employer. We evaluate qualified applicants without regard to race, color, religion, sex, age, national origin, disability, veteran status, genetic information, and other legally protected categories.


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