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Internship Jobs in Colorado

Outside Sales Internship - Summer 2026

Uline

Aurora, CO

As a Uline Outside Sales Intern, spend your summer working alongside sales professionals with the best training, tools and products to win in the field every day. Coordinate and conduct one-on-one customer visits providing business solutions from our world-class website and catalog stacked with 43,000+ quality products.

6 days ago
Medical Sales - Paid Internship

Medical Sales Recruiting

$60000 - $75000

Denver, CO

INTERNSHIP OVERVIEW: As critical members of the team, interns will spend the first six months building phone skills and answering questions from prospective students while learning all about Medical Sales College. In the second half of the internship, interns will contribute to the promotion and growth of Medical Sales College by sourcing new sales opportunities through inbound lead follow-up and outbound phone calls, emails and texts.

14 days ago
Client Informatics Summer Internship

The Cigna Group

Denver, CO

These states include: Alabama, Alaska, Arizona, Arkansas, Delaware, Florida, Georgia, Hawaii, Idaho, Iowa, Kansas, Maryland, Massachusetts, Michigan, Nebraska, Ohio, Pennsylvania, Texas, Utah, Vermont, and Washington State._. We’re seeking curious, driven students who are: + Progressingtoward a bachelor's degree and have completed at least 2 years in desired majors including; Finance, Business, Economics, Risk Management or related fields by start of internship program.

30+ days ago
Summer 2026 MBA Internship- NBMBAA

Humana

$37440 - $96800

Denver, CO

Interns will drive strategic projects, gain exposure to executive leadership, and develop the skills and insights needed to launch a successful post-MBA or graduate school career in healthcare.  . + Demonstrated leadership experience through professional, academic, military, or extracurricular roles, showcasing the ability to lead teams, drive cross-functional initiatives, influence stakeholders, and deliver measurable results in a dynamic environment .  .

30+ days ago
Summer 2026 MBA Internship- ROMBA

Humana

$37440 - $96800

Denver, CO

Interns will drive strategic projects, gain exposure to executive leadership, and develop the skills and insights needed to launch a successful post-MBA or graduate school career in healthcare.  . + Demonstrated leadership experience through professional, academic, military, or extracurricular roles, showcasing the ability to lead teams, drive cross-functional initiatives, influence stakeholders, and deliver measurable results in a dynamic environment .  .

30+ days ago
Risk Management & Underwriting Summer Internship Program - Denver, CO

The Cigna Group

Denver, CO

These states include: Alabama, Alaska, Arizona, Arkansas, Delaware, Florida, Georgia, Hawaii, Idaho, Iowa, Kansas, Maryland, Massachusetts, Michigan, Nebraska, Ohio, Pennsylvania, Texas, Utah, Vermont, and Washington State._. What We’re Looking For: We’re seeking curious, driven students who are: + Progressing toward a bachelor's degree and have completed 3 years in a preferred major and/or minors are preferred: Risk Management, Insurance, Business, Economics, Finance, Management, Mathematics, or Healthcare. .

30+ days ago
2026 Sales Summer Internship

JBS USA

Greeley, CO

Our mission: To be the best in all that we do, completely focused on our business, ensuring the best products and services to our customers, a relationship of trust with our suppliers, profitability for our shareholders and the opportunity of a better future for all of our team members. Purpose/General Summary:During this 10-week summer internship, you will use your unique perspective and knowledge to help us find operational gaps and improve process efficiency in a way that makes a genuine mark on our business.

30+ days ago
Summer Internship- Software Engineer, Broomfield CO (4996)

SMX

$17 - $22

Broomfield, CO

Internship Requirements: Must be enrolled full-time and pursuing an associate, undergraduate or graduate degree from an accredited college/university (junior or senior level preferred) in computer engineering, computer science, applied mathematics, physics, aerospace engineering, or other related STEM field. Our delivery model and unique approaches harness our deep technical and domain knowledge, providing forward-looking insights and practical solutions to power secure mission acceleration.

24 days ago
Summer Internship- AI/ML, Broomfield CO (4997)

SMX

$17 - $22

Broomfield, CO

Internship Requirements: Must be enrolled full-time and pursuing an associate, undergraduate or graduate degree from an accredited college/university (junior or senior level preferred) in computer engineering, computer science, applied mathematics, physics, aerospace engineering, or other related STEM field. Our delivery model and unique approaches harness our deep technical and domain knowledge, providing forward-looking insights and practical solutions to power secure mission acceleration.

24 days ago
Summer 2026 MBA Internship – Finance & Human Resources

Humana

$37440 - $96800

Denver, CO

Interns will drive strategic projects, gain exposure to executive leadership, and develop the skills and insights needed to launch a successful post-MBA or graduate school career in healthcare. + Demonstrated leadership experience through professional, academic, military, or extracurricular roles, showcasing the ability to lead teams, drive cross-functional initiatives, influence stakeholders, and deliver measurable results in a dynamic environment.

30+ days ago
2026 JBS Operations Summer Internship

Pilgrim's Pride Corporation

Greeley, CO

Shadowing how to identify problems or bottlenecks in production processes and resolve issues; ensure production resources (including materials, equipment, and human resources) are available as needed to maintain product schedules; support continuous improvement goals in safety, quality, cost, and customer service. Our mission: To be the best in all that we do, completely focused on our business, ensuring the best products and services to our customers, a relationship of trust with our suppliers, profitability for our shareholders and the opportunity of a better future for all of our team members.

30+ days ago
2026 JBS Operations Summer Internship

JBS USA

Greeley, CO

Shadowing how to identify problems or bottlenecks in production processes and resolve issues; ensure production resources (including materials, equipment, and human resources) are available as needed to maintain product schedules; support continuous improvement goals in safety, quality, cost, and customer service. Our mission: To be the best in all that we do, completely focused on our business, ensuring the best products and services to our customers, a relationship of trust with our suppliers, profitability for our shareholders and the opportunity of a better future for all of our team members.

30+ days ago
2026 Supply Chain Summer Internship

JBS USA

Greeley, CO

Our mission: To be the best in all that we do, completely focused on our business, ensuring the best products and services to our customers, a relationship of trust with our suppliers, profitability for our shareholders and the opportunity of a better future for all of our team members. Purpose/General Summary:During this 10-week summer internship, you will use your unique perspective and knowledge to help us find operational gaps and improve process efficiency in a way that makes a genuine mark on our business.

30+ days ago
Summer Internship - Electrical Engineer

Lux Aeterna

Denver, CO

Interns at Lux Aeterna design circuits, build hardware, run tests, and help solve real flight problems. You will work directly with our team to create a reusable spacecraft’s electrical system that must survive launch, operate on orbit, safely return to Earth, and be refurbished in preparation for the next launch.

10 days ago
Summer Internship - Structures Engineering

Lux Aeterna

Denver, CO

This is not a documentation or shadowing role — interns at Lux Aeterna design parts, build hardware, run tests, and help solve real flight problems. Interns are expected to engage directly with the hardware and help close real problems, not just generate reports.

18 days ago
Graduate (Summer) Internship - Dynamic Observability & State Estimation for Large-Scale Distribution Grids

National Laboratory of the Rockies

$44500 - $71200

Golden, CO

E-Verifywww.dhs.gov/E-VerifyFor information about right to work, click here (http://www.justice.gov/sites/default/files/crt/legacy/2013/08/13/FinalOSCPosterEN08_01_2013.pdf) for English orhere (http://www.justice.gov/crt/file/813271/download) for Spanish. The Power Systems Engineering Center (PSEC) at The National Laboratory of the Rockies (NLR) focuses on advancing research in dynamic analysis of large-scale distribution grids, with particular emphasis on dynamic observability, controllability, and state estimation.

4 days ago
Public Accounting Internship

MBE CPAs

Durango, CO

We expanded our services from just accounting and tax to now include an entire affiliate group of services to support our clients with 19 office locations including 13 in Wisconsin in Black Earth, Door Country, Fort Atkinson, Mauston, Marshfield, Portage, Reedsburg, Sauk City, Sun Prairie, Tomah, Wausau, Wisconsin Dells-Lake Delton, and our corporate headquarters in Baraboo plus offices in Phoenix, Goodyear, and Chandler, Arizona, in Scottsbluff and Kimball, Nebraska, and Durango, Colorado. You can apply for the Staff Accountant posting at https://mbecpa.isolvedhire.com/ or submit your resume to this posting, and be sure to note that you will graduate in the coming 6-12 months.

18 days ago
Actuarial Internship (Undergrad) Summer 2026

The Cigna Group

Denver, CO

You’ll also participate in training sessions, case studies, community-building events, and intern-exclusive programming developed by our “Intern Committee”—a team of full-time AEDP associates committed to shaping an inclusive and engaging summer experience. These states include: Alabama, Alaska, Arizona, Arkansas, Delaware, Florida, Georgia, Hawaii, Idaho, Iowa, Kansas, Maryland, Massachusetts, Michigan, Nebraska, Ohio, Pennsylvania, Texas, Utah, Vermont, and Washington State._.

30+ days ago
Environmental Health and Safety - Summer Internship

Elevation Labs

Denver, CO

Elevation Labs is seeking a highly motivated and detail-oriented Environmental Health & Safety (EHS) Intern to support site-level safety, environmental compliance, and regulatory initiatives. Currently pursuing a Bachelor's degree (Junior or Senior preferred) in, Environmental Health & Safety, Occupational Safety, Environmental Science, Industrial Hygiene Or related discipline.

5 days ago
Summer 2026 MBA Internship – Marketing & Consumer Engagement

Humana

$37440 - $96800

Denver, CO

Interns will drive strategic projects, gain exposure to executive leadership, and develop the skills and insights needed to launch a successful post-MBA or graduate school career in healthcare. + Demonstrated leadership experience through professional, academic, military, or extracurricular roles, showcasing the ability to lead teams, drive cross-functional initiatives, influence stakeholders, and deliver measurable results in a dynamic environment.

30+ days ago
Summer 2026 MBA Internship – Strategy and Operations

Humana

$37440 - $96800

Denver, CO

Interns will drive strategic projects, gain exposure to executive leadership, and develop the skills and insights needed to launch a successful post-MBA or graduate school career in healthcare. + Demonstrated leadership experience through professional, academic, military, or extracurricular roles, showcasing the ability to lead teams, drive cross-functional initiatives, influence stakeholders, and deliver measurable results in a dynamic environment.

30+ days ago
Summer 2026 MBA Internship – CenterWell

Humana

$37440 - $96800

Denver, CO

Interns will drive strategic projects, gain exposure to executive leadership, and develop the skills and insights needed to launch a successful post-MBA or graduate school career in healthcare. + Demonstrated leadership experience through professional, academic, military, or extracurricular roles, showcasing the ability to lead teams, drive cross-functional initiatives, influence stakeholders, and deliver measurable results in a dynamic environment.

30+ days ago
Summer 2026 MBA Internship – Insurance

Humana

$37440 - $96800

Denver, CO

Interns will drive strategic projects, gain exposure to executive leadership, and develop the skills and insights needed to launch a successful post-MBA or graduate school career in healthcare. + Demonstrated leadership experience through professional, academic, military, or extracurricular roles, showcasing the ability to lead teams, drive cross-functional initiatives, influence stakeholders, and deliver measurable results in a dynamic environment.

30+ days ago
EWB-USA Summer Internship 2026 (Unpaid)

Engineers Without Borders USA

$0.01

Denver, Colorado

To address this challenge, EWB-USA is developing the BMET Digital Training Initiative, an open-access, hybrid digital training platform that combines modular online learning, open technical repair content, and mobile-optimized learning management systems (LMS) to strengthen biomedical maintenance at scale. Projects may include cleaning and analyzing Knowledge Base article data, reviewing article view statistics to identify trends and content gaps, and organizing and labeling digital media assets using Google Drive or a digital asset management (DAM) approach.

30+ days ago
2026 Paid Summer Internship – Sales Representative at Premier Roofing

Premier Roofing Company

$2000 - $5000

Denver, Colorado

At Premier, our founders started as college grads chasing an opportunity — and built one of America’s most respected roofing companies. Build leadership, resilience, and goal-setting skills that will serve you long after summer ends.

30+ days ago
Actuarial Internship (Masters/PhD) - Summer 2026

The Cigna Group

Denver, CO

You’ll also participate in training sessions, case studies, community-building events, and intern-exclusive programming developed by our “Intern Committee”—a team of full-time AEDP associates committed to shaping an inclusive and engaging summer experience. These states include: Alabama, Alaska, Arizona, Arkansas, Delaware, Florida, Georgia, Hawaii, Idaho, Iowa, Kansas, Maryland, Massachusetts, Michigan, Nebraska, Ohio, Pennsylvania, Texas, Utah, Vermont, and Washington State._.

30+ days ago
Brokerage Insurance Internship

Amwins Internships

$20 - $21

Greenwood Village, CO

That's why our internship program is designed to give you real-world experience, meaningful projects, and a chance to explore the insurance industry from the inside out. You won't be fetching coffee — you'll be building skills, making connections, and discovering what a career in risk management and insurance could look like for you.

30+ days ago
Project Engineer Summer Internship

Forgen

Denver, CO

This internship applies the general knowledge of the physical sciences and mathematics underlying engineering and specialized knowledge of the mechanics of solids (particularly of soils), hydraulics, theory of structure, strength of materials, engineering geology and surveying. Forgen is seeking students pursuing degrees in Civil Engineering, Construction Management, or related field; and other interested candidates to join our various project locations for internship opportunities.

30+ days ago
Winter 2027 Tax Internship- Denver

Topel Forman

Denver, CO

The Winter 2027 Tax Interns in our Denver office will receive individual, hands-on training from experienced tax professionals in various areas of taxation, tax workpaper documentation, and other projects. As an award-winning firm, Topel Forman has been serving a range of individuals and professionals, to family-owned businesses and corporations for over sixty years, providing accounting, tax, audit, family office, and advisory services.

30+ days ago
Environmental Science / Planning Internship - I0019

Felsburg Holt & Ullevig

$23

Denver, CO

Opportunities to perform field monitoring and data collection activities, which may include windshield surveys, visual impact assessments, viewshed analysis, wetland delineations, habitat assessments, migratory bird surveys, site monitoring, construction inspections, historic surveys, hazardous materials assessments, traffic noise impact analysis, air quality monitoring, etc. Undergraduate (Junior or higher status) or Graduate student in Landscape Architecture, Environmental Design, Environmental Engineering, Geography, Environmental Science, Environmental Studies, Natural Resources, Archaeology, Chemistry, History, Ecology, Wildlife Biology, Botany, or a closely related field.

30+ days ago
Consumer and Branch Banking Internship Summer 2026

Huntington National Bank

$21 - $25

Denver, CO

Huntington offers Consumer and Branch Banking Internships in Customer Solution Center, Community Development positions will be located in Columbus, OH and Branch Banking positions will be located in Minnesota and Colorado. Our internship program is perfect for ambitious students looking to gain valuable hands-on experience that will build more than just your resumé - it will expand your career possibilities after graduation.

30+ days ago
Internship Program - College Students

21st Century Equipme

$15 - $20

Yuma, CO

This dynamic rotation will provide you with a well-rounded perspective of our business, preparing you for a successful career At the end of your internship, you will present a final report to our senior management team, highlighting your experiences, completed projects, and suggestions for improving the internship program. MINIMUM QUALIFICATIONS: Current college student in the process of obtaining an associate or bachelor's degree Excellent communication and problem-solving skills Agricultural knowledge or experience is preferred but not required for this internship - we will teach you everything there is to know!

30+ days ago
Communications & Volunteerism Internship

Laradon

Denver, CO

Supporting the communications manager with creating unique and interesting content for Laradon’s social media channels— Facebook, Instagram, TikTok & LinkedIn. You won’t just be observing; you will be the voice of our mission, helping us tell the stories of the individuals we serve and building the volunteer force that makes our work possible.

4 days ago
Integrated Communications Internship

TURNER

Denver, CO

Interns are introduced to a wide cross-section of public relations and digital media, including research, reporting, media and influencer relations, content development, social media, a whole lot of writing and special events. Upon completion of the internship, the student will have a thorough understanding of the skills, knowledge and experience required to succeed in, as well as have a greater insight into his/her personal strengths and interests.

7 days ago
Consumer and Branch Banking Internship Summer 2026

Huntington

$21 - $25

Denver, CO

Huntington offers Consumer and Branch Banking Internships in Customer Solution Center, Community Development positions will be located in Columbus, OH and Branch Banking positions will be located in Minnesota and Colorado. Our internship program is perfect for ambitious students looking to gain valuable hands-on experience that will build more than just your resumé - it will expand your career possibilities after graduation.

30+ days ago
STRUCTURAL Construction Internship - Summer 2025

STRUCTURAL PRESERVATION SYSTEMS, LLC

SEDALIA, CO

STRUCTURAL offers a wide range of specialty repair and maintenance services and is the largest concrete repair contractor in the United States, with roughly 2,500 employees working from locations nationwide and in select international markets. STRUCTURAL integrates technology-driven solutions with specialty contracting services to improve, protect, and enhance the existing infrastructure of owners directly, and in partnership with designers and contractors.

30+ days ago
DoD Skillbridge Internship for Transitioning Military Service Members

SciTec

Boulder, CO

SciTec values military experience and has a variety of opportunities for transitioning service members as part of the DoD Skillbridge program at all of our operating locations (Princeton, NJ; Boulder, CO; El Segundo, CA; Huntsville, AL; Dayton, OH). SciTec, Inc. is a dynamic small business with the mission to deliver advanced sensor data processing technologies and scientific instrumentation capabilities in support of National Security and Defense.

30+ days ago
AI/ML Engineering Internship

Frontier Technology Inc.

Golden, Colorado

This role provides a unique opportunity for you to work closely with FTI’s Chief Technology Officer (CTO) and his AI technologist, gaining mentorship and direction from senior technical leaders while collaborating with experienced engineers in a dynamic environment. This internship offers hands-on experience working on impactful projects in Artificial Intelligence, Machine Learning, MLOps, and advanced analytics that support mission-critical solutions for the Department of Defense (DoD).

30+ days ago
Internship Development Section Head

Scientific Applicati

Colorado Springs, CO

We have expertise in RF, EMP, Pulsed Power, Acoustics and Threat Warning Systems, and we prioritize partnering with our customers to address real-world problems with cost-effective solutions that wo The SARA High Power Electromagnetics Division (HPEM) is looking for a remarkably talented, motivated, and imaginative Internship Section Head/Electrical Engineer to support research and development activities and transition innovative technologies to the DoD, DoE, and their contractors in Colorado Springs, CO. Scientific Applications & Research Associates, Inc. (SARA) is a world-class Defense Research and Development enterprise, with a charter to create new and emerging technology innovations in support of Commercial & Government organizations.

30+ days ago
Geotechnical Engineering Internship/Co-Op

Westwood Professiona

Loveland, CO

The successful job applicant will be part of a dynamic geotechnical engineering team and will assist senior geotechnical staff with project work involving various aspects of geotechnical engineering related to renewable energy and other power-related projects. Geotechnical Engineering Internship/Co-Op Job Locations US-MN-Minnetonka | US-CO-Westminster | US-WI-Middleton | US-MN-Minnetonka ID 2025-6616 Category Geotechnical Engineering Position Type Intern Division Renewables Overview Geotechnical Co-Op Westwood Professional Services, Inc.

30+ days ago
DoD Skillbridge Safety Internship

MasTec Advanced Technologies

FORT COLLINS, CO

MasTec Utility Services delivers critical infrastructure construction and engineering services for power delivery, gas, and water customers, specializing in overhead and underground electric distribution for power delivery systems, gas distribution construction for gas systems, and turnkey solutions for a variety of water, sewer, and civil infrastructure projects. Backed by the strength of decades of experience, unrivaled industry skills, and a deep commitment to core values, MES delivers safe, innovative, and environmentally responsible services that provide extraordinary value to clients.

18 days ago
Real-time power system modeling and simulation internship

National Laboratory of the Rockies

$51200 - $81900

Boulder, CO

E-Verifywww.dhs.gov/E-VerifyFor information about right to work, click here (http://www.justice.gov/sites/default/files/crt/legacy/2013/08/13/FinalOSCPosterEN08_01_2013.pdf) for English orhere (http://www.justice.gov/crt/file/813271/download) for Spanish. Nestled south of Boulder, Colorado, and north of NLR’s main South Table Mountain campus, Flatirons Campus sits adjacent to the Rocky Flats National Wildlife Refuge and countless acres of open space and parks with stunning views of the Flatirons rock formations.

1 day ago
Internship, Safety Project - Summer 2026

MasTec Inc

Louisville, Colorado

In addition to our industrial market sector; In infrastructure, we specialize in general heavy civil construction, underground utilities, structures, electrical work, material production, roadways, bridges, specialty pavement overlays, environmental projects and commercial buildings. Overview: Responsible for providing general administrative support to the jobsite including tasks of moderate to advanced difficulty requiring excellent clerical skills in multiple areas of the Safety Department.

30+ days ago
Internship|Sales and Management|AT&T|Metronet|

RTA of Iowa

Colorado Springs, CO

About Metronet: Metronet is a cutting-edge telecommunications provider bringing 100% fiber-optic internet, TV, and phone services to communities across the country. Internship Overview: We’re seeking ambitious, outgoing, and motivated individuals for our Sales & Management Internship Program.

30+ days ago
Sales Internship

Aerotek

Loveland, Colorado

Individual compensation offered for this position within this range will depend on many factors, including qualifications, skills, relevant experience, job knowledge, geographic location, internal equity, and other pertinent job-related factors. We work with 95% of Fortune 500 companies and specialize in staffing and services solutions in manufacturing, logistics, construction, aviation, facilities and maintenance.

30+ days ago
Graduate (Year-Round) Internship –Modeling, Simulation, and Analysis of Power Systems With High-Penetration Renewables

National Laboratory of the Rockies

$50200 - $80300

Golden, CO

E-Verifywww.dhs.gov/E-VerifyFor information about right to work, click here (http://www.justice.gov/sites/default/files/crt/legacy/2013/08/13/FinalOSCPosterEN08_01_2013.pdf) for English orhere (http://www.justice.gov/crt/file/813271/download) for Spanish. NLR takes into consideration a candidate’s education, training, and experience, expected quality and quantity of work, required travel (if any), external market and internal value, including seniority and merit systems, and internal pay alignment when determining the salary level for potential new employees.

30+ days ago
Mission Analysis and Simulation Internship

iMETALX

$55000 - $67000

Colorado Springs, CO

This role is designed to engage students in vital analyses influencing our cutting-edge projects and provide them with key skills in simulation processes as applied to real-world missions. A dedicated undergraduate or graduate student pursuing a degree in Aerospace Engineering, Systems Engineering, Robotics, Computer Science, or a related field.

21 days ago
Environmental Specialist Internship

MWH Global, Inc

Broomfield, CO

In Stantec stiamo cercando una persona motivata a crescere professionalmente, da inserire con un iniziale stage di 6 mesi. La risorsa affiancherà professionisti esperti nei processi di progettazione, consulenza e gestione ambientale, contribuendo in modo concreto allo sviluppo di progetti in ambiti quali
-Studi di impatto ambi...

29 days ago
Environmental Hydrogeologist Internship

MWH Global, Inc

Broomfield, CO

Stantec è alla ricerca di una risorsa che sarà inserita in stage nel Team Ambientale e affiancherà il team tecnico nello sviluppo di modelli numerici idrogeologici 3D, nell’ambito di progetti di caratterizzazione e bonifica di siti contaminati.
Lo stage è pensato come percorso formativo per l’acquisizione di competenze operati...

18 days ago
Project Engineer - Internship, Denver

Brinkmann Constructors

Aurora, Colorado

Responsibilities: Brinkmann Project Engineer Interns are responsible for assisting the Project Engineer, Project Manager, and Superintendent in all aspects of the day-to-day management of a construction project. The project engineer intern’s work is primarily performed indoors out of a main office or field office at the construction site; occasionally outdoors in various weather conditions.

30+ days ago