Top Internships in Denver & Boulder, CO

As a Detection Engineer Intern, you will analyze telemetry, research coverage opportunities, improve workflows, and communicate threat findings effectively.

Support planning, executing, and optimizing paid digital acquisition campaigns. Coordinate content and landing pages, run A/B tests, analyze marketing data, create performance reports, and recommend optimizations to improve ROAS.

Manage three branded Reddit accounts: post 2–3 times per week per brand, engage with users and comments per brand guidelines, craft brand-specific Reddit strategies, and coordinate with an outside contractor to manage meetings and goals.

Part-time remote internship supporting the Email Automation team: transfer and code email copy into templates, maintain templates, perform QA, run semi-weekly A/B tests and data tracking, and assist with organizational and cross-functional email operations.

Assist in monitoring insider risks, support data protection, investigate security alerts, and maintain operational governance in a security team.

Part-time remote legal internship supporting regulatory and marketing compliance. Conduct FDA/FTC and advertising legal research, review marketing materials, draft memos, assist with contract lifecycle and corporate records, and support policy and training development.

The Phishing Analyst-SkillBridge Intern will assist in threat detection and analysis, focusing on phishing attempts. Responsibilities include identifying and mitigating threats using AI and collaborating with teams to enhance cybersecurity measures.

Manage day-to-day operations for two YouTube podcast channels: review 3–4 edited videos weekly, curate IG/TikTok clips, maintain podcast/YouTube schedule, write podcast ads, create mash-up episodes, and support PR/marketing projects and freelance editing coordination.

This intern role in Federal Security Operations focuses on cybersecurity, project tracking, and maintaining relationships with customer stakeholders in a mission-driven environment.

This internship role focuses on SRE skills, requiring collaboration and problem-solving in dynamic environments for Zscaler's Zero Trust Exchange team.

Support the Field Team Network with administrative tasks: email communications, partner outreach, meeting notes, document organization, process review and improvement, time studies and quality review of calls, plus project work aligned with intern skills and growth.

Support tax compliance and client engagements across federal, state, and individual/trust areas. Communicate with clients and staff, perform client-site work, create and maintain workpapers, analyze internal controls, research industry comparables, and use firm tax/accounting systems and Microsoft Office. Full-time for eight weeks or more.

Support small-business accounting and tax engagements: prepare and review financial statements, assist with tax return preparation and payroll/1099/W-2 filings, maintain client records, perform attest procedures, and communicate findings to engagement teams and clients.

Assist audit teams with testing, internal control analysis, workpaper documentation, and industry research. Communicate with clients and staff, prepare written company and financial reviews, and participate full-time for eight weeks or more under guidance of a Career Advocate.

Support small-business engagements by applying accounting procedures, maintaining client records, preparing financial statements, assisting with tax planning and return preparation, performing attest procedures, preparing payroll/1099/W-2 filings, and communicating with clients to identify improvement opportunities.

Seasonal tax internship introducing students to public accounting. Interns participate in client work, tax compliance (federal, state, local, trust/wealth), internal controls analysis, and preparation/maintenance of engagement workpapers. Interns work full-time for eight weeks or more, receive orientation and mentorship, and use the firm's accounting and tax technology.

Participate in public accounting audit engagements: perform audit testing, prepare workpapers and written reports, research industry comparables, assist with risk assessment, communicate with clients and staff, and work full-time for at least eight weeks while receiving orientation and mentoring.

Work with the development team to build and debug web applications: write Python backend code, create responsive HTML/CSS/JavaScript frontends, integrate frontend and backend, participate in code reviews and testing, learn frameworks and document progress.

Assist in designing and building full-stack web applications using the MERN stack. Work on frontend (React) and backend (Node/Express), create responsive UIs, develop RESTful APIs, manage MongoDB databases, debug and optimize applications, collaborate in code reviews and agile sprints, and stay current with web development trends.

Support execution of large-scale B2B outbound and demand-generation campaigns: build outreach sequences, manage outreach tools, enrich and QA data, maintain outbound infrastructure, coordinate webinar and content syndication operations, research target accounts/ICPs, assist reporting, and apply AI tools to automate workflows.

Support Tier 2 network operations: install and maintain LAN/WAN devices, respond to incident tickets, assist Tier 3 engineers on surveys and equipment installs, perform configuration management, update topology drawings, and maintain accurate asset inventories.

SkillBridge/Hiring Our Heroes internship for active-duty U.S. military to develop Java Spring Boot microservices and backend REST APIs for satellite ground planning. Collaborate with systems engineers, support integration/testing, participate in code reviews, and contribute to DevOps (GitLab, CI/CD, containers). Follow secure development practices in a classified environment while learning under Radix mentors.

Part-time remote internship conducting competitive and labor-market research for skilled trades and infrastructure training, synthesizing insights using AI-assisted methods, pricing analysis, and delivering written and verbal reports to inform product and market strategy.

Intern will build Zepho's social media presence, create content, manage influencer relationships, and track performance metrics. This role offers potential for full-time conversion.

As an Intern, you will assist with day-to-day tasks, participate in meetings, support departmental operations, and help with SAP implementation projects.