Mechanical Engineering Intern

Work with Us. Change the World.

At AECOM, we're delivering a better world. Whether improving your commute, keeping the lights on, providing access to clean water, or transforming skylines, our work helps people and communities thrive. We are the world's trusted infrastructure consulting firm, partnering with clients to solve the world’s most complex challenges and build legacies for future generations.

There has never been a better time to be at AECOM. With accelerating infrastructure investment worldwide, our services are in great demand. We invite you to bring your bold ideas and big dreams and become part of a global team of over 50,000 planners, designers, engineers, scientists, digital innovators, program and construction managers and other professionals delivering projects that create a positive and tangible impact around the world.

We're one global team driven by our common purpose to deliver a better world. Join us.

AECOM is seeking a Mechanical Engineer Intern to be based in Denver, CO.

This position is expected to begin in Summer 2026.

Internships are designed to introduce and build essential, hands-on skills that differ from those attained in the academic arena and help to enhance the transition from student to professional. Interns are assigned duties that will provide a broad, well-rounded learning experience within their field of study.

The responsibilities of this position include, but are not limited to:

• Performs specific portions of a broader assignment under the mentoring of an experienced engineer.
• Prepares designs, calculations, sketches, diagrams, schematic drawings, and working drawings.
• Evaluate, select, and apply standard engineering techniques, procedures, and judgment based on experience to design HVAC systems in buildings using building information modeling.
• Coordinate with other discipline Engineers as applicable for the continuity of the design process.
• Participate in design progress and coordination meetings.
• Assist with the design content by applying both design and technical knowledge to ensure high-quality outputs under project timelines.

Minimum Requirements:

• Candidates must be pursuing a bachelor’s degree or higher in mechanical engineering and must have completed at least one year of study. Candidates who have recently graduated with a bachelor’s degree and plan to continue with a master’s degree are eligible to apply for these positions. Recent graduates must have been enrolled in their bachelor’s degree in the most previous school term with an interest in pursuing an advanced degree in the same or similar discipline at the conclusion of the internship.
• Due to the nature of the work, U.S. citizenship is required.

Preferred Qualifications:

• Assist in the production of all phases of the design process.
• General knowledge in HVAC or MEP.
• With a background in Thermodynamics, Heat Transfer.
• Some Knowledge of AutoCAD and/or Revit.
• Knowledgeable in the Microsoft Office Suite of programs.
• Well organized and possesses an innovative mindset.

• Relocation assistance is not available for this position.
• Sponsorship for US employment authorization is not available now or in the future for this position.
• This position requires a hybrid work schedule, which includes in-office work in Denver, CO. The selected candidate must be available to work in Denver, CO on a scheduled basis.

About AECOM

AECOM is proud to offer comprehensive benefits to meet the diverse needs of our employees. Depending on your employment status, AECOM benefits may include medical, dental, vision, life, AD&D, disability benefits, paid time off, leaves of absences, voluntary benefits, perks, flexible work options, well-being resources, employee assistance program, business travel insurance, service recognition awards, retirement savings plan, and employee stock purchase plan.

AECOM is the global infrastructure leader, committed to delivering a better world. As a trusted professional services firm powered by deep technical abilities, we solve our clients’ complex challenges in water, environment, energy, transportation and buildings. Our teams partner with public- and private-sector clients to create innovative, sustainable and resilient solutions throughout the project lifecycle – from advisory, planning, design and engineering to program and construction management. AECOM is a Fortune 500 firm that had revenue of $16.1 billion in fiscal year 2024. Learn more at aecom.com.

What makes AECOM a great place to work

You will be part of a global team that champions your growth and career ambitions. Work on groundbreaking projects - both in your local community and on a global scale - that are transforming our industry and shaping the future. With cutting-edge technology and a network of experts, you’ll have the resources to make a real impact. Our award-winning training and development programs are designed to expand your technical expertise and leadership skills, helping you build the career you’ve always envisioned. Here, you’ll find a welcoming workplace built on respect, collaboration and community—where you have the freedom to grow in a world of opportunity.

As an Equal Opportunity Employer, we believe in your potential and are here to help you achieve it. All your information will be kept confidential according to EEO guidelines.