Top Internships in Milwaukee, WI

Industrial Engineering Intern supporting manufacturing and product development projects. Responsibilities include creating CAD models, drawings, and bills of materials; developing and validating designs; conducting testing and process validation; analyzing cost, reliability, safety, and manufacturability; and collaborating with manufacturing partners, designers, contract manufacturers, and product specialists. The internship is full-time and on-site during summer 2027, with potential travel to other facilities.

Full-time summer electrical engineering internship supporting generator and power tool product development. Responsibilities include designing and validating electrical systems, controls, embedded systems, and power electronics; creating CAD models, drawings, and bills of materials; developing and executing testing and validation plans; evaluating reliability, safety, cost, and manufacturability; and collaborating with manufacturing, design, and product teams. Travel to other Generac facilities may be required.

Data Science Interns will partner with experienced team members to translate business challenges into analytical questions. They will learn and apply data preparation, exploratory analysis, feature engineering, forecasting, classification, anomaly detection, machine learning, and generative AI techniques using tools such as Python, SQL, Snowflake, Azure Data Factory, Matillion, and Power BI. The role includes presenting findings, collaborating with technical and business teams, participating in mentorship, and learning the end-to-end delivery of data science projects.

Supports civil engineering and construction projects involving roadways, utilities, sewers, and bridges. Performs basic design, modeling, data collection, engineering analysis, calculations, reporting, and preparation of plans, specifications, and estimates. Assists with construction management while meeting project deadlines and quality requirements. The role requires at least two years of college in an engineering program, basic engineering skills, Microsoft Office proficiency, teamwork, and occasional outdoor work.

Supports international logistics and supply chain coordination by tracking shipments, inventory, delivery timelines, and transportation costs. Analyzes logistics data using Excel or Power BI, prepares customs and trade documentation, coordinates with vendors and carriers, assists with cost-reduction and process-improvement initiatives, and presents performance reports to management. The internship also involves supporting supply chain technology systems and collaborating with procurement, sales, trade compliance, and other cross-functional teams.

Supports compensation, benefits, and broader HR initiatives as part of Rehlko’s Total Rewards team. The intern will analyze data in Excel, generate insights, collaborate with stakeholders, and assist with projects that support employee engagement and business goals. The role includes mentorship, professional development, and hands-on exposure to Total Rewards programs.

Participate in Rehlko’s early talent program while supporting finance and accounting initiatives. The intern will apply advanced Excel skills, financial modeling knowledge, and analytical abilities to interpret financial data, generate business insights, and develop recommendations. The role includes mentorship, professional development, collaboration, and exposure to enterprise financial systems. Applicants must be enrolled in a relevant degree program and authorized to work in the United States without current or future visa sponsorship.

Supports product and digital marketing initiatives while gaining hands-on experience through Rehlko’s early talent program. The role involves applying marketing analytics, using Power BI and Canva, managing social media tools, communicating effectively, coordinating multiple projects, and identifying ways to improve marketing effectiveness and customer engagement. Candidates must be marketing students enrolled as juniors, seniors, or graduate students at an accredited institution.

Mechanical Engineering Intern supporting aerospace customer projects through mechanical design, packaging, 3D modeling, thermal and model analysis, verification testing, and mechanical assembly integration. The role includes test execution, thermal surveys, troubleshooting, and support for vibration and thermal qualification tests under senior engineering guidance. Interns work onsite full-time during summer 2027 in a hands-on engineering development environment.

Supports cybersecurity engineering for avionics and in-flight computing systems. Responsibilities include risk and safety assessments, cybersecurity lifecycle documentation for FAA certification, penetration testing, requirements development, architecture and design reviews, verification, and compliance activities under experienced engineers’ supervision.

Year-round intern supporting AI, automation, and analytics initiatives for business and manufacturing teams. Responsibilities include analyzing processes, preparing and validating data, developing workflows with ChatGPT, Alteryx, SQL, Snowflake, Python, Power Automate, and Tableau, creating reusable AI prompts and custom GPT solutions, documenting processes, testing solutions, and communicating outcomes to stakeholders.

Ten-week paid internship for college juniors pursuing finance, trust and wealth management, or business degrees. Interns support client advisory projects and research, observe client meetings, gain exposure to financial planning and portfolio construction, and communicate with clients, vendors, and internal teams. The role requires analytical thinking, strong communication, organization, curiosity, integrity, confidentiality, and proficiency with Microsoft Office.

Supports electrical transmission system reliability and efficiency by analyzing system issues, reviewing events, developing operating plans, coordinating outages with utilities and regulators, and improving grid reliability processes. The intern gains hands-on exposure to real-time operations and reliability strategy while collaborating independently and cross-functionally.

Supports transmission system planning by using electrical system models to evaluate grid performance, future capacity needs, renewable energy and energy storage integration, and long-term planning scenarios. Assists with data collection, technical studies, documentation, reliability initiatives, and grid modernization while collaborating with engineers.

Supports the System Operations team in updating, developing, and maintaining an Energy Management System for electric transmission operations. Responsibilities include maintaining EMS components, developing operator visualization tools, gaining experience with SCADA and advanced network applications, conducting engineering analysis, and collaborating with internal teams to improve EMS functionality.

Supports marketing and communications through content creation, social media, campaign support, competitive research, asset organization, performance reporting, and customer engagement initiatives. The intern will help promote corporate giving, business initiatives, and brand efforts while gaining experience in communications strategy, stakeholder insights, and event support. Candidates should be pursuing a bachelor's degree in marketing, business, communications, or a related field and possess strong writing, organization, creativity, and collaboration skills.

Supports cost estimating and project performance tracking for capital infrastructure projects. Responsibilities include updating estimating tools, maintaining earned value management tools, monitoring project health indicators, analyzing field change requests and cost metrics, preparing reports, and improving cost engineering processes. The intern will gain experience supporting electric utility infrastructure projects and project execution teams.

Civil Design Engineering Intern supporting utility and transmission projects. Responsibilities include organizing engineering data, assisting with material procurement and design documentation, preparing drawings and structural analyses, updating as-built drawings and asset databases, reviewing consultant scopes, and occasionally verifying field implementations. Candidates should be Civil Engineering bachelor's students with CAD experience, strong attention to detail, and a valid driver's license.

Quality Engineering Intern supporting root cause analysis, continuous improvement, process audits, data collection, and manufacturing process analysis. The role focuses on reducing defects, improving efficiency and product quality, participating in problem-solving and team activities, and developing engineering skills under manager guidance. This is an onsite position in New Berlin, Wisconsin, with candidates required to live within 50 miles and arrange their own transportation.

Mechanical Engineering Intern supporting real-world engineering projects at Rehlko. The role offers mentorship, professional development, and hands-on exposure to product development, manufacturing, testing, quality engineering, continuous improvement, data analysis, and problem-solving. Candidates must be enrolled in an engineering degree program and authorized to work in the United States without current or future visa sponsorship.

Supports systems engineering for avionics products, including requirements definition, system design, verification testing, software debugging, hardware integration, lifecycle documentation, and FAA certification activities. Works under experienced engineers on customer projects in a controlled development environment.

Develop and maintain avionics software for flight displays, in-flight computing devices, and flight controls. Participate in requirements, design, coding, verification, testing, debugging, hardware integration, and software lifecycle documentation supporting FAA and international certification. Work onsite with experienced engineers on customer projects using Agile Scrum practices.

Supports engineers developing, testing, troubleshooting, and enhancing equipment controls, building automation systems, and smart-building products. Designs automated test configurations, executes test plans, assists with defect resolution, and contributes to simulation, emulation, and product-development projects. The role offers practical experience across control systems, thermodynamics, programming, hardware, software, HVAC systems, and physical-system modeling while working part time during school and full time in summer.

Supports semiconductor engineering projects through device testing, characterization, data analysis, process development, and optimization. Collaborates with cross-functional teams to troubleshoot technical issues and improve semiconductor design and manufacturing processes. The internship provides hands-on experience with semiconductor technology, engineering tools, and simulation software.

Develop and test AI software using large datasets, Python, JavaScript, and C++. Evaluate algorithms, statistics, and data to improve industrial applications. Collaborate with machine learning and data engineers on end-to-end AI and integration solutions, stay current with AI trends and regulations, and present project progress to leadership and stakeholders.