Top 5 Mechanical engineering internship Jobs in Fairfax, Va

Mechanical Engineer Intern/Co-op Fall 2026
Legence —Arlington, VA
- Full-time
- Microsoft Excel
- Office
- Travel
- 401(k)
- Paid sick time
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Mechanical Engineer Intern/Co-op Fall 2026
CMTA —Arlington, VA
- Full-time
- Microsoft Excel
- Office
- Travel
- 401(k)
- Paid sick time
Quick Apply
Mechanical Engineer Intern/Co-op Fall 2026 - Energy Solutions
Legence —Fairfax, VA
- Full-time
- Microsoft Excel
- Engineering
- Travel
- 401(k)
- Paid sick time
Quick Apply
Mechanical Engineer Intern/Co-op Fall 2026 - Energy Solutions
CMTA —Fairfax, VA
- Full-time
- Microsoft Excel
- Engineering
- Travel
- 401(k)
- Paid sick time
Quick Apply
Solar Engineer Intern/Co-op Fall 2026 - Energy Solutions
CMTA —Fairfax, VA
- Full-time
- Microsoft Excel
- CAD
- Travel
- 401(k)
- Paid sick time
Quick Apply

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Mechanical Engineer Intern/Co-op Fall 2026
Legence —Dublin, OH
Our engineers will teach you how we design and implement mechanical systems/infrastructure and implement energy efficient measures in our building projects.
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Mechanical Engineer Intern/Co-op Fall 2026
CMTA —Dublin, OH
Our engineers will teach you how we design and implement mechanical systems/infrastructure and implement energy efficient measures in our building projects.
Quick Apply

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Mechanical Engineer Intern/Co-op Fall 2026

Legence -
Arlington, VA

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Job Details

Full-time

Benefits

401(k)
Paid sick time

Qualifications

Microsoft Excel
Productivity software

Full Job Description

CMTA, a Legence company
CMTA is one of the fastest growing engineering firms in the U.S., with nationally recognized expertise in sustainable, high-performance building engineering. We are a collaborative, innovative, and energetic team that leverages a data-driven, holistic approach to consulting engineering, performance contracting, and zero energy projects. We focus on finding engineers whose skills and personalities drive them to excel, fostering a workplace that provides unparalleled growth and career opportunities.

For college students interested in engineering design for the built environment, CMTA has a robust co-op program for students pursuing a degree in Mechanical Engineering, Electrical Engineering, and Architectural Engineering. We offer an opportunity for students to immerse themselves for one or more semesters in the consulting engineering world. Our co-ops build industry competitive skills in a hands-on environment, all while working on a team, and being trained by Professional Engineers in AutoCAD and Revit. The skills our co-ops learn allow them to create real construction drawings for real CMTA projects.
This position is a full time (40 hrs./week), onsite position with a competitive hourly pay rate and eligible for overtime pay. This position will start in August 2026 and go through Fall 2026. Dates are flexible with school calendar. Our hope is that the co-op students that are hired will do multiple co-op rotations with CMTA with possible consideration for full time employment upon graduation.

Job Description:
This position provides a unique opportunity for hands-on training in mechanical/HVAC/Energy design. The ideal candidate will possess excellent interpersonal skills and be able to work well with a team, and independently. Our engineers will teach you how we design and implement mechanical systems/infrastructure and implement energy efficient measures in our building projects. This is a great opportunity to work on some of the most challenging and complex MEP projects and become an important part of our design team.
Job Functions: (may include but are not limited to)

Produce detailed layout and equipment details of HVAC systems,
Produce one-line diagrams/schematics,
Assist the design team in the process of assembling organized sets of drawings,
May assist in the data collection and/or field verification, and
Work in conjunction with designers and engineers to help develop all aspects of a project.

Requirements:

Pursuing a Bachelor of Mechanical Engineering or Architectural Engineering, preferably a sophomore (2nd year), or junior (3rd year),
Strong interest in Building Systems Mechanical Engineering,
AutoCAD and REVIT experience preferred,
Strong interpersonal and communication skills,
Proficiency with Microsoft Word and Excel,
Ability to work both independently and with a team,
Ability to work full time in our office throughout the co-op term,
Ability to travel locally for job site inspections, field work, etc.

No sponsorship available for this position.
#LI-RH1 #LI-Onsite

About Legence
Legence (Nasdaq: LGN) is a leading provider of engineering, consulting, installation, and maintenance services for mission-critical systems in buildings. The company specializes in designing, fabricating, and installing complex HVAC, process piping, and other mechanical, electrical, and plumbing (MEP) systems—enhancing energy efficiency, reliability, and sustainability in new and existing facilities. Legence also delivers long-term performance through strategic upgrades and holistic solutions. Serving some of the world’s most technically demanding sectors, Legence counts over 60% of the Nasdaq-100 Index among its clients.
Benefits Overview
Time Off Benefits: Paid sick leave
Financial Benefits: 401(k) retirement savings plan
Reasonable Accommodations
If you need assistance or accommodations during the application or interview process, please contact us at [email protected] or your dedicated recruiter with the job title and requisition number.
Third-Party Recruiting Disclaimer
Legence and its affiliates do not accept unsolicited resumes from agencies; any such submissions without a prior signed agreement authorized by Legence Holdings LLC's CHRO or Director of Talent Acquisition will not incur fees and are considered property of Legence.
Pay Disclosure & Considerations
Where pay ranges are indicated, please note that a successful candidate’s exact pay will be determined based relevant job-related factors, including any of the following: candidate’s experience, skills, and qualifications, as well as geographic and market considerations. We are committed to ensuring fair and competitive compensation for all employees and comply with all applicable salary transparency laws.
Equal Employment Opportunity Employer
Legence and its affiliate companies are proud to be an equal opportunity workplace. We are committed to equal employment opportunity regardless of race, color, religion, sex (including pregnancy, gender identity, and sexual orientation), marital or familial status, national origin, age, disability, genetic information (including family medical history), political affiliation, military service, other non-merit-based factors, and any other characteristic protected under applicable local, state or federal laws and regulations.
EEO is the Law

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mechanical engineering internship jobs in fairfax, va

Mechanical Engineer Intern/Co-op Fall 2026

Mechanical Engineer Intern/Co-op Fall 2026

Mechanical Engineer Intern/Co-op Fall 2026 - Energy Solutions

Mechanical Engineer Intern/Co-op Fall 2026 - Energy Solutions

Solar Engineer Intern/Co-op Fall 2026 - Energy Solutions

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