Mortenson’s success is not a matter of luck; it’s a result of our ingenuity, expertise, and exceptional people coupled with our unparalleled focus on customer service.

Our foundation and culture are based upon our company values of trust, safety, teamwork, responsibility, service and stewardship. We are inspired by a compelling purpose to build structures and facilities for the advancement of modern society and a mission to create an exceptional customer experience. Mortenson has built a reputation for being a leader in our industry and in the communities in which we live and work.

It all starts with our exceptional people and exceptional teams. Mortenson has been voted a "best place to work" 40+ times regionally over the past decade…

…What are you waiting for?! 

Mortenson’s Strategic Marketing team is seeking a motivated Proposal Intern to join our team. This internship offers a valuable opportunity to gain hands-on experience in the proposal development process within the Architectural, Engineering, and Construction (AEC) industry. You will work closely with our proposal team, contributing to the preparation and submission of compelling proposals that align with our strategic goals. 

Highlights of your work with Mortenson will include

• Conduct research to gather information and insights to support proposal content.


• Coordinate with cross-functional teams to collect necessary data and materials.


• Help develop and maintain a centralized site to elevate proposal quality and consistency across the organization.


• Continuously improve the tools and resources set in place for proposal development.


• Support the proposal team with administrative tasks as needed.


• Assist in the preparation of proposals, as needed, ensuring accuracy and compliance with customer requirements.

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

• Currently pursuing a 4 year degree in Marketing, Business, Communications, or a related field.


• Strong organizational skills and attention to detail.


• Excellent written and verbal communication skills.


• Ability to work collaboratively in a team environment.


• Proficiency in Microsoft Office Suite (Word, Excel, PowerPoint).


• Have experience in InDesign, Illustrator, and other Adobe Suite programs (preferred).

You will join an exciting and ever-changing industry with a minimum 12-week internship with our team. This opportunity is full-time for the summer of 2025. This internship is not relocation-assistance eligible. 

Visa sponsorship is not available for this position. 

Mortenson is an EOE/Affirmative Action/M/F/Veteran/Disabled employer.