Weekend Intern Jobs in Colorado (NOW HIRING)

Sustainability Intern

Join a team that's passionate about building inspiring spaces and pushing the industry forward in smarter, more innovative ways. As a top builder, developer, and EPC (Engineering, Procurement, and Construction), our expertise spans markets like sports, renewable energy, data centers, healthcare, and more. At Mortenson, we're grounded in offering meaningful work, real career growth, and a collaborative culture where your ideas and contributions matter.

We're looking for motivated, adaptable individuals who thrive in fast-paced environments and enjoy working with a diverse range of people. If you're proactive, curious, and ready to make an impact while growing your career, check out our opportunities!

As an intern, you'll get hands-on experience right away, working alongside project teams and partners to keep things moving. You'll help solve real problems, stay organized, communicate across teams, and make an impact from day one while building the foundation for your career.

Responsibilities

As a Sustainability Engineer Intern at Mortenson, you will interact with a variety of people to implement Mortenson's Build for the Greater Good program. You will work at our Denver, CO office and support the sustainability team.

Highlights of your time with this Mortenson internship will include:

• In-depth research addressing all facets of sustainable building practices

• Assisting in unorthodox data collection - be it calling local agencies or diving several levels deep in online search 

• Exploration and discovery of new publicly available informational sources and unidentified analytics-focused tools/capabilities that contribute to sustainable building initiatives

• Collecting, updating, and fact-checking existing structures and project profiles

Program Overview:

Our summer intern program (May - August 2027) is designed to give you real, hands-on experience from day one, working on meaningful projects that directly impact the business. You'll gain exposure to innovative work, build professional skills through development opportunities, and be supported by a team that values your growth. Your ideas matter here, and you'll have the chance to contribute, learn, and make a difference while exploring your career path.

Required Qualifications:

Cultivate your skills in your chosen field of study and build your career with Mortenson. We look forward to hearing from you if you:

• Currently pursuing an undergraduate, four-year degree in Environmental Science, Environmental Engineering, Ecology, Biology, Data Analytics, Sustainable Architecture, Environmental Architecture, Environmental Design, Engineering, or other related degree

Preferred Qualifications:

• Have previous related internship experience

• Are currently enrolled as an undergraduate junior

• Have a basic understanding of construction and generally accepted business practices

• Demonstrate strong collaboration, communication, and problem-solving skills and show initiative and leadership

• Showcase a positive and professional attitude and solid customer service skills

• Are detail-oriented, organized, and can effectively handle multiple competing priorities

The hourly wage for college Interns starts at $18. Students may be paid higher wages based on their year in school.

Please make note:

• Visa sponsorship is not offered for this position.

• Our postings are typically open a minimum of 5 days and an average of 44 days.

Equal Employment Opportunity

Your uniqueness brings new and creative perspectives to the team. Mortenson is committed to providing equal opportunities of employment (EOE) to all individuals, regardless of your race, religion, gender, national origin, age, veteran status, disability, marital status or any other legally protected category.

Other Items to Note

• Mortenson reserves the right to hire any individual without legal or financial obligation on unwanted solicitations.No agency emails, calls, or solicitations are accepted without a valid agreement.

• Must be currently legally authorized to work in the U.S. without sponsorship for employment visa status (e.g., H1B status, 0-1, TN, CPT, OPT, etc.). We are unable to sponsor or take over sponsorship of an employment Visa at this time.