Mechanical Engineering Intern

Mechanical Engineering Intern | St. Louis, MO

100% Employee-Owned Big-firm resources, local-team relationships, ONE IMEG culture

This posting is for Summer 2027 Internship opportunities.

IMEG is hiring a Mechanical Engineering Intern in St. Louis, Missouri. Over 10-12 weeks, you'll assist in the analysis, design, and implementation oversight of mechanical systems for the vertical building industry while gaining hands-on experience alongside experienced engineers and consultants. In this role, you'll support project documentation, coordination, and job site observations while helping teams work within project budgets and meet client expectations. You'll collaborate across disciplines on healthcare-focused MEP work while advancing high-performance, energy-efficient design.

At a Glance
Location: St. Louis, MO
Discipline: Mechanical
Markets: Healthcare; MEP
Ownership: 100% employee-owned (ESOP)
Work Schedule: Full-time in office, 10-12 week summer program
Program Length: 10-12 week summer program
Sponsorship: Not available

What You'll Do

• Assist with mechanical system design according to code and company standards
• Research commercially available equipment and supporting resources
• Support client relations, project design notebooks, and permanent record documentation
• Coordinate design activities and schedules with architectural, structural, electrical, mechanical, technology, clerical, and equipment supplier teams
• Document design decisions, meetings, and client instructions while monitoring project progress
• Review project documents for accuracy and completeness before final check
• Help prepare and issue addendum information
• Conduct periodic job site observations and support other services required by the contract services agreement

What You'll Bring

• Completed at least 2 years towards a Bachelor of Science (BS) Degree in Mechanical Engineering, or equivalent required
• Prior internship experience in the building design consulting industry preferred
• Strong interest in design consulting
• Proficient with MS Office Suite including, but not limited to, Word, Excel, and Outlook
• Skilled in AutoCAD and/or Building Information Modeling (BIM) software
• Ability to clearly communicate in both oral and written communication to individuals or groups

Why IMEG

We put people at the center of who we are, creating positive outcomes for people, communities, and our planet.

• A paid internship with real, hands-on project work, not busywork
• A structured program with an assigned mentor and a cohort of fellow interns
• A clear path to full-time: many interns and co-ops convert to full-time roles at IMEG
• IDEA Program: a firm-wide innovation accelerator where employees across every discipline develop and scale new tools, from VR and AI to carbon-reduction technology
• Real impact from day one: at IMEG, an intern once became our Virtual Reality leader
• Exposure across disciplines and offices at a 100+ office, employee-owned firm
• MEG, our in-house AI platform, helps employees find information and build agents that streamline project workflows and calculations

Bring Your Career to IMEG

Apply today to build hands-on experience, learn from experienced engineers and consultants, and contribute to projects that support clients and communities.

IMEG, an employee-owned corporation, is committed to investing in employees' futures through professional development programs and opportunities for career advancement. We offer a comprehensive benefits package including generous PTO, flexible schedule, and assistance with tuition reimbursement. Additionally, employees are eligible to enroll in health, dental, vision, and life insurance on their first day of employment.

Want to learn more about IMEG and our other amazing career opportunities? Please visit

IMEG is committed to providing equal employment opportunities in all employment practices, without regard to race, color, religion, sex (including sexual orientation or gender identity), gender, national origin, disability, age, genetic information (including family medical history), parental status (including pregnancy, childbirth or related medical conditions including lactation), ethnic origin, hair type (including hairstyle or hair texture), citizenship status, marital status, military service, veteran's status, political affiliation, non-merit-based factors, or any other characteristic protected by law. In accordance with antidiscrimination law, it is the purpose of this policy to put into effect these principles and mandates. IMEG prohibits discrimination and harassment of any type. IMEG conforms to the spirit as well as to the letter of all applicable laws and regulations.

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