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94 development intern jobs at 53 companies in Boulder, CO

1w
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Product Development Intern
Thornton, Colorado, United States
$25/hr OnsiteInternship
Solid Power
Solid PowerNasdaq: SLDP: Designs and manufactures all-solid-state battery technology for vehicles.
Currently enrolled in a STEM bachelor's program; academic or industrial lab experience; safe handling of hazardous materials and PPE; familiarity with material characterization and DOE; Microsoft Office; Python or Minitab a plus; strong communication skills.
XRD, TGA, DSC, rheometry, Python, Minitab, Microsoft Office
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2mo
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Summer Intern - Wind Development
Louisville, Colorado, United States
OnsiteInternship
AES
AESNYSE: AES: Provides electricity and renewable energy solutions globally.
Pursuing a bachelor’s or master’s degree; strong analytical and communication skills; proficient in Excel; attention to detail; GIS/Power BI preferred.
Microsoft Excel, Power BI, GIS
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2w
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Intern, Organizational Effectiveness & Talent Development
Denver, Colorado, United States
$20/hr HybridPart Time, Internship
National Endowment for Financial Education
National Endowment for Financial Education: Improving financial literacy through research, advocacy, and education.
Part-time paid intern supporting organizational effectiveness, talent management, leadership development, research, training design, and project coordination. Requires strong research, writing, communication, Microsoft Office, and interest in HR/OD fields.
Microsoft Office
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3d
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Development Strategic Operations Intern
United States or New York City or Boston or Washington or Boulder or San Francisco
$18/hr RemoteFull Time
Environmental Defense Fund
Environmental Defense Fund: Finds science-based solutions for urgent global environmental problems.
Enrolled in or recent graduate of an undergraduate program; basic Microsoft Office skills; confidentiality with sensitive data; Salesforce experience a plus; strong communication, organization, and attention to detail.
Microsoft Office, Salesforce
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3mo
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AI Engineering Intern
Boulder, Colorado, United States
$17-$25/hr OnsiteFull Time, Internship
TIFIN
TIFIN: AI platform for personalized wealth management and investment advice.
Pursuing or recently completed BS/MS in CS, engineering or related; strong Python; familiarity with machine learning/AI, APIs, and backend development via internships, coursework or research.
Python
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2mo
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Graduate (Year-Round) Intern – Socio-Economic Impacts
Boulder, Colorado, United States
$45k-$71k/yr HybridFull Time
National Laboratory of the Rockies
National Laboratory of the Rockies: Conducts applied research in energy systems and technology innovation.
0+ YOEGraduate intern focusing on socio-economic impacts; requires coursework in public policy, economics, or social science; strong communication and stakeholder engagement.
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2mo
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Business Development Manager - Electronics
Remote or Los Angeles or San Francisco or Denver or Atlanta or Chicago or Detroit or Madison Heights or New York or Dallas
$120k-$145k/yr RemoteFull Time
Henkel
HenkelXETRA: HEN3: Manufactures laundry, beauty, and adhesive products globally.
5+ YOEBachelor’s degree required; MBA preferred. 5+ years in electronics/electrification industry with applications and market trends experience. Strong networking, negotiation, and project leadership skills. Ability to travel up to 30% (including international).
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Learning & Development Specialist
Denver, Colorado, United States
OnsiteInternship
Maxx Properties
Maxx Properties: Owns and manages a nationwide portfolio of multifamily apartment communities.
Some college in Business/HR, proficiency in Microsoft Office, strong organizational and communication skills; preferred experience with Canva, Microsoft Forms, basic video editing and AI tools; familiarity with LMS.
Microsoft Office, LMS, Canva, Microsoft Forms, ChatGPT, Claude
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3mo
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Marketing Intern
Englewood, Colorado, United States
$18-$20/hr OnsiteFull Time
BrightSpring Health Services
BrightSpring Health ServicesNASDAQ: BTSG: Provider of home and community-based health and pharmacy services.
0+ YOECollege junior/senior or recent graduate pursuing Marketing/Business degree; knowledge of brand development, marketing materials, social and website content; self-starter with proactive attitude.
Microsoft Office Suite, Excel, PowerPoint, Word
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4w
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Intern - Unpaid; BR 21; 7.1.26
Denver, Colorado, United States
HybridInternship, Part Time
Texana Bank
Texana Bank: A regional bank and mortgage services provider offering community banking and mortgage offices with a long local history.
Structured, educational unpaid research internship (approx. 11 weeks). Produce written research report and presentation; conduct research and shadow loan officers. Estimated 18–20 hours/week; must be a minor with schedule accommodating training and school commitments.
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1mo
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Vice President, Business Development
Berthoud, Colorado, United States
$280k-$330k/yr OnsiteFull Time
Ursa Major
Ursa Major: Designs and manufactures rocket engines and aerospace propulsion systems.
12+ YOESenior sales leader with minimum 12 years in aerospace/defense sales or capture, proven federal procurement success, FAR/DFARS knowledge, team leadership, ability to obtain U.S. security clearance, onsite in Berthoud CO with extensive domestic and some international travel.
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2d
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GNC Intern (Fall 2026)
Golden, Colorado, United States
OnsiteFull Time
Rendezvous Robotics
Rendezvous Robotics: Develops self-assembling modular tiles for in-space infrastructure.
Pursuing an engineering/physics/math degree with coursework in dynamics and controls; working knowledge of Python, C++, or MATLAB/Simulink; understanding of rigid-body dynamics and electromagnetics; strong communication and analytical skills.
Python, C++, MATLAB, Simulink, Git
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2w
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Environmental Laboratory - Intern
Denver, Colorado, United States
$19/hr OnsitePart Time
Onterris
OnterrisNYSE: ONT: Global provider of environmental consulting, testing, and remediation services.
High school diploma, current university enrollment, basic lab techniques, Microsoft Excel, ability to lift up to 25 lbs, detail-oriented and good communication.
Microsoft Excel
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5d
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Instrument Solutions Intern
Denver, Colorado, United States
$25/hr OnsiteTemporary, Part Time
Metro Water Recovery
Metro Water Recovery: Operates wastewater treatment and recovery services in Denver.
Assist with maintenance, calibration, benchtop nutrient analyses, data recording/analysis, and support instrument trials; requires coursework in physical/biological sciences or environmental engineering.
Microsoft Office
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1mo
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Associate Business Development Representative
Denver, Colorado, United States
$45k-$55k/yr OnsiteFull Time
RXO
RXONYSE: RXO: Provide asset-light transportation and freight brokerage solutions.
1+ YOEMinimum 1 year procurement experience; responsibilities include cold calling, lead development, rate negotiation, and updating internal systems. Bachelor’s degree preferred; transportation, sales, or customer service experience a plus.
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Business Development Representative
United States or Princeton or Durham or Westminster
$35k-$47k/hr RemoteFull Time
Trimble
TrimbleNASDAQ: TRMB: Provides hardware and software for precision positioning and modeling.
Outbound prospecting and lead qualification, strong communication, multi-channel prospecting management, cross-functional collaboration, flexibility to work with international teams across European time zones.
CRM
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4w
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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)
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1mo
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Applied Research Intern - Water (Fall 2026)
Denver, Colorado, United States
$23-$35/hr FieldMultiple Commitments Available
Stantec
StantecToronto Stock Exchange / New York Stock Exchange: STN: Global design, engineering, and environmental consulting firm.
Currently enrolled in a B.S. or higher in environmental/chemical engineering or related, lab and research experience, wet chemistry and sampling experience, strong analytical and communication skills, proficiency with Microsoft Excel/Word/PowerPoint.
Microsoft Excel, Microsoft Word, Microsoft PowerPoint
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1d
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Business Development Specialist
Denver, Colorado, United States
OnsiteFull Time
Meketa Investment Group
Meketa Investment Group: Independent investment consulting and fiduciary advisory firm.
2+ YOEBachelor's degree in business/finance/economics,2+ years in financial services sales/internal wholesaling/client service,CRM proficiency,strong communication,knowledge of private markets,and ability to manage high-volume outbound activity.
HubSpot, Salesforce, CRM
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1mo
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Applied Research Intern - Water (Fall 2026)
Denver, Colorado, United States
$23-$35/hr FieldMultiple Commitments Available
Stantec
StantecTSX: STN: Provides professional engineering, architecture, and environmental consulting services.
0+ YOECurrently enrolled in a B.S. or higher in environmental/chemical engineering (or related) with lab and research experience; wet chemistry, sampling, analytical testing, data analysis, and strong written/oral communication.
Microsoft Excel, Microsoft Word, Microsoft PowerPoint
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