Top Internships in Jacksonville, FL

Supports mechanical system, component, and assembly design and development; conducts engineering research and analysis; collaborates with cross-functional teams; helps solve technical problems and optimize designs; participates in testing and validation; and gains experience with industry-standard tools and software.

Supports the design and development of electrical systems and components, conducts testing and performance analysis, collaborates with cross-functional teams, and gains experience with industry-standard tools, electrical codes, and standards under experienced engineering guidance.

Supports the design and development of mechanical systems, components, and assemblies; conducts engineering research and analysis; collaborates with cross-functional teams to solve technical problems; participates in testing and validation; and gains exposure to industry-standard tools and software through hands-on aerospace projects.

The Systems Engineering Intern will assist with designing and developing system solutions, gathering requirements, defining specifications, integrating and testing system components, troubleshooting technical issues, and documenting engineering activities. The intern will collaborate with experienced engineers and cross-functional teams while gaining hands-on experience in system design, integration, testing, modeling, and simulation within Honeywell Aerospace.

Supports product marketing, market research, customer and competitive analysis, product positioning, pricing, go-to-market planning, digital marketing, demand generation, brand promotion, and new product launches. Collaborates with cross-functional teams to develop marketing plans, identify growth opportunities, monitor offering performance, and improve processes under the guidance of a regional marketing manager.

Supports the design and development of electrical systems and components, conducts testing and performance analysis, collaborates with cross-functional teams, and gains practical experience with industry-standard tools, technologies, electrical codes, and standards. The intern receives mentorship while contributing to aerospace engineering projects.

Supports investor relations activities by preparing presentations, earnings materials, and quarterly reports; researching industry trends and investor sentiment; developing communications and disclosures; maintaining investor databases; tracking engagement metrics; and collaborating with finance, legal, and communications teams.

Assist with roadway and transportation engineering design projects, including geometric alignments, profiles, cross sections, traffic control details, construction plans, quantity estimates, pavement design reports, and specifications. Use MicroStation, GEOPAK, and 3D corridor modeling tools while collaborating with multidisciplinary engineering teams and supporting public-sector transportation clients.

Supports cross-functional new product launch projects from development through scale-up and launch. Responsibilities include facilitating project teams, creating timelines, conducting risk assessments, preparing leadership status updates, supporting continual process improvement, and collaborating with Sales, Marketing, Product Development, Regulatory, Manufacturing, and Engineering teams.

Summer sales intern supporting Johnson & Johnson’s Vision/MedTech sales organization. Responsibilities include shadowing Territory Account Managers, participating in customer engagements, conducting competitive research, supporting sales planning, completing a commercial project, and presenting recommendations. The intern receives mentorship and exposure to sales strategy, healthcare customers, cross-functional collaboration, and leadership development.

Supports experienced engineers with Individual Patient Solution workflows, process improvement, educational materials, product design and testing, quality assurance, and case documentation. Collaborates with production, sales, marketing, and product management while following regulatory and internal guidelines. The intern shadows operations, assists with IPS cases, develops problem-solving and communication skills, and gains practical engineering experience in medical device product development.

Supports management consulting engagements by designing client deliverables, presentations, visual assets, reports, and meeting graphics. Assists with documenting requirements and processes, researching client industries and design best practices, and applying visual design, information hierarchy, and user experience principles. Collaborates with consulting professionals, manages multiple deadlines, and works within client branding guidelines. Travel may comprise 20%–50% of the schedule.

Supports mechanical engineering teams with design documentation, AutoCAD and Revit drawings, building system design calculations, equipment sizing, field investigations, and construction site visits. The intern participates in educational lunch-and-learn sessions while gaining hands-on experience with MEP engineering projects and collaborating with experienced engineers.

Unpaid summer marketing internship supporting a Pinterest-focused social media management agency. Responsibilities include researching cold-email leads, assisting with email marketing campaigns, managing Facebook community engagement, developing marketing campaign ideas, creating visual branding guidelines, testing strategies, measuring results, and developing marketing systems and SOPs. The intern will receive training but is expected to demonstrate ownership, creativity, self-leadership, and a willingness to learn quickly.

Collect, clean, and analyze sports data; develop machine learning and predictive models; create visualizations and reports; collaborate with data and sports strategy teams; and monitor advances in sports analytics.

Software Engineering Intern working across the technology stack to build semantic search, agentic AI systems, graph data solutions, and production-quality software. The role requires at least 20 hours per week and involves solving complex problems in an early-stage startup environment with significant ownership and experimentation.

Supports seed and crop protection product development through agronomic research, analysis, and collaboration with local teams. Provides agronomic insights to assist market development and sales execution, while completing a business-critical project. The 11-week internship includes customer and industry exposure, travel, and potential progression into a two-year rotational associate program.

Software Engineer Interns spend 12 weeks contributing to collaborative engineering teams at SingleStore. They develop features, test software, own projects end-to-end, and continuously deploy work to production. Interns gain exposure to the product lifecycle and business while working with experienced engineering mentors and cross-functional teams. The role requires strong computer science fundamentals, programming ability in JavaScript, Golang, or TypeScript, and an interest in building reliable software.

Supports FP&A activities including financial reporting, customer and product analysis, budgeting, forecasting, resource planning, process improvement, management presentations, and industry analysis. The intern works with finance leaders and mentors in a 12-week summer program, gaining exposure to business-line finance, commercial finance, and corporate FP&A while preparing for a finance development program.

Supports presales and delivery teams with client discovery, technical and competitive research, solution architecture, prototypes, presentations, Statements of Work, documentation, testing, and engagement tracking. Collaborates with sales, delivery, and technical teams throughout client pursuits and project delivery. The internship provides hands-on experience in consulting, presales, solution development, and technology delivery.

Participate in a 12-week commodities trading internship supporting energy market analysis, risk management, trade-related projects, and process improvement. Analyze natural gas supply, demand, storage, and transportation fundamentals; provide quantitative and analytical support; collaborate across commodities teams; and present findings to senior management. The role requires strong problem-solving, communication, attention to detail, and proficiency in Excel and PowerPoint.

Internship opportunity with BSI, a global business improvement and standards organization. The description provides an overview of BSI’s mission, values, industry expertise, and commitment to positive social and environmental impact, but does not specify the intern’s responsibilities or department.

Supports state advocacy committees during legislative sessions by tracking bills, assisting advocacy processes, coordinating with state directors, and advocating for organizational priorities across Arizona, Nevada, and Texas.

Supports website and web application development, AI/ML integration, API and database work, cloud technologies, prototypes, testing, troubleshooting, and brand-improvement initiatives. Collaborates with corporate support teams to identify automation and technology opportunities. The internship provides hands-on experience with web development, emerging AI technologies, and internal tools in a small government contracting environment.

Assist the social media team with sourcing user-generated content, obtaining permissions, creating weather-related posts, monitoring social networks, engaging with users, analyzing social media data, researching platform trends, and preparing reports. The internship offers hands-on experience in social media management and digital content creation, requiring approximately 20 hours per week with evening and weekend availability.