8 summer 2026 intern jobs at 5 companies in Denver, CO

1mo
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2026 Summer Intern, Human Resources (Talent Acquisition)
Denver, Colorado, United States
$19-$24/hr OnsiteInternship
Frontier Airlines
Frontier AirlinesNasdaq: ULCC: Provides low-fare passenger air transportation services across the Americas.
University enrollment preferred; coursework in HR, Communications, or Organizational Development preferred; customer service or event planning experience preferred; strong office and communication skills; proficiency with Microsoft Word and Excel.
Microsoft Word, Microsoft Excel, Learning Management System (LMS)
4w
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Engineering Internship Summer 2026
Loveland, Colorado, United States
$16-$20/hr OnsiteInternship
Enthusiast Auto Holdings
Enthusiast Auto Holdings: Direct-to-consumer e-commerce retailer of specialty performance automotive parts.
Pursuing a bachelor's in mechanical engineering or related field; CAD proficiency (SolidWorks/CATIA), welding experience (MIG/TIG), strong analytical and communication skills; independent and team work capability.
SolidWorks, CATIA, NetSuite, Salesforce
2d
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Early Careers: Intern Conversion only - Pension Outsourcing Analyst - 2026
Detroit or Philadelphia or Minneapolis or Denver or Dallas or Boston
$51k-$55k/yr HybridFull Time
WTW
WTWNASDAQ: WTW: Provides global risk management, insurance brokerage, and advisory services.
Completion of a summer 2026 WTW Pension Outsourcing internship, bachelor's or master's degree with quantitative coursework, 3.0 GPA, analytical skills, communication skills, and Microsoft Office proficiency.
Microsoft Office, Microsoft Excel
2d
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Early Careers: Intern Conversion only - Pension Outsourcing Analyst - 2026
Detroit or Philadelphia or Minneapolis or Denver or Dallas
$51k-$55k/yr OnsiteFull Time
WTW
WTWNASDAQ: WTW: Global advisory, broking, and solutions.
Completed WTW's summer 2026 Pension Outsourcing internship; bachelor's or master's degree with quantitative coursework, 3.0 GPA, analytical skills, client service experience, communication skills, and Microsoft Office proficiency.
Microsoft Office, Microsoft Excel
1w
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Kiewit Building Group - Field Engineer Intern (Summer 2026) 1
Omaha or Seattle or Washington or Lone Tree or Corpus Christi or Boulder or Dallas or El Paso or Abilene or Honolulu or Council Bluffs
$20-$25/hr FieldMultiple Commitments Available
Kiewit
Kiewit: Provides large-scale construction and engineering services for diverse infrastructure.
Pursuing a construction management or engineering degree; requires construction scheduling, cost control, drawing interpretation, Microsoft Office, communication, site access, travel or relocation, and a valid driver's license.
Microsoft Office, SureTrak, Hard Dollar, Revit, SAP, Pro Log, Primavera P6
2d
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Early Careers: Intern Conversion only- Retirement Actuarial Analyst- 2027
New York City or Atlanta or Boston or Arlington or Short Hills or Philadelphia or Stamford or Chicago or Cleveland or Detroit or Minneapolis or Pittsburgh or St. Louis or Los Angeles or Houston or Dallas or San Francisco or Denver or Seattle
OnsiteFull Time
WTW
WTWNASDAQ: WTW: Provides global risk management, insurance brokerage, and advisory services.
Bachelor's or master's degree in a quantitative field, GPA of 3.0+, prior WTW summer 2026 internship, strong technical or client service skills, and legal U.S. work authorization without sponsorship.
SPDs
2d
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Early Careers: Intern Conversion only- Retirement Actuarial Analyst- 2027
New York City or Atlanta or Boston or Arlington or Short Hills or Philadelphia or Stamford or Chicago or Cleveland or Detroit or Minneapolis or Pittsburgh or St. Louis or Los Angeles or Houston or Dallas or San Francisco or Denver or Seattle
OnsiteFull Time
WTW
WTWNASDAQ: WTW: Global advisory, broking, and solutions.
Bachelor's or master's degree in actuarial science, mathematics, statistics, finance, or quantitative field; 3.0 GPA; actuarial exams preferred; prior WTW summer 2026 internship; strong analytical, technical, client service, and communication skills.
2mo
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Adjunct Hiring Pool - Political Science & International Affairs
Greeley, Colorado, United States
$1k-$1k/hr OnsiteContract, Temporary
University of Northern Colorado
University of Northern Colorado: Public university providing undergraduate and graduate degree programs.
Master’s degree in Political Science or International Relations; available to teach face-to-face; pool for Fall 2026-Summer 2027; temporary, part-time adjunct positions.