Internships in Catalina Foothills, Arizona, United States

Audit Department at Redwitz Inc. supports public accounting clients by delivering comprehensive audit and accounting engagements. The intern provides audit support, performs substantive testing, documents internal controls, and assists in preparing financial statements while shadowing senior staff.

Tax Department at Redwitz Inc. provides comprehensive tax compliance and advisory services to diverse clients. The Tax Intern supports audit and accounting engagements, prepares individual and business tax returns, and assists with tax audits under senior supervision.

Raytheon’s System Safety Engineering Team seeks a highly motivated intern to learn MIL-STD-882E safety processes and perform safety tasks and analysis. The role involves developing plans and reports, interpreting system requirements, investigating new technology, and preparing technical reviews.

Veterinary Student Ambassador at University of Arizona supports Alliance Animal Health by promoting events, identifying opportunities, and managing on‑campus activities. Works with peers, faculty, and clinicians to enhance AAH presence and provides mentorship and career guidance.

Distribution Sales Intern at Pool Corporation offers a 12‑week rotational program across multiple U.S. distribution centers. Interns receive hands‑on sales training by traveling with Business Development Representatives, shadowing contractors, builders, and retail customers to understand the full spectrum of the pool, irrigation, and landscaping business.

This unpaid volunteer internship offers recent Peer Support graduates the chance to gain hands‑on experience in a non‑crisis warm line. Interns share their recovery journey, provide community resources, and document calls while developing coaching and listening skills.

RTX is seeking an Intern – Systems Engineer to work onsite in Tucson, AZ, collaborating with multi‑disciplinary design teams to co‑develop engineering hardware, provide rapid prototyping solutions, and support the entire product lifecycle. The role requires a STEM bachelor’s student entering sophomore year, hands‑on testing experience, CAD proficiency, and troubleshooting skills.

RTX, a leading defense contractor, is seeking an Intern for its Configuration and Data Management (CDM) organization in Tucson, AZ. The role focuses on supporting the Data Management and Execution section by collecting and analyzing metrics, delivering data sets, and assisting leadership with data organization and special projects. Candidates must be enrolled in a bachelor’s or higher degree program, entering their sophomore year by Summer 2026, and pursuing studies in Business Management, Business Administration, or a related discipline.

This internship offers a hands‑on opportunity within RTX’s Configuration Management and Data Management (CMDM) organization, focusing on the Effectors Configuration Management department. Interns will review and analyze released engineering change data, coordinate changes with engineering, quality, support, manufacturing, and data control activities, and learn the pillars of configuration management—planning, identification, change management, status accounting, verification, and audits.

The RTX internship offers a hands‑on experience in the Effectors Center of the Software organization, located in Tucson, AZ. As a Software Engineer Intern, you will work on real‑time embedded and application software for missile, launcher, radar, and naval systems. The role involves requirements gathering, design, coding, testing, integration, and documentation within an agile team.

RTX is seeking an Intern – Energetics & Propulsion Engineer to work onsite in Tucson, AZ. The role involves applying advanced technologies and scientific principles to integrate propulsion, thrusters, controllers, software, mechanical and electrical interfaces into missile systems and space vehicles. Responsibilities include development and production programs across Raytheon Product Lines, reviewing manufacturing processes, collaborating with subcontractors on solid rocket motor design and manufacturing, and participating in long‑range program planning and technical direction.

RTX is seeking a Quality Engineering Intern to support continuous improvement and lean/agile methodologies at its Tucson, AZ facility. The intern will participate in root cause analysis, corrective and preventive action solutions, trend analysis, and compliance flow-down for Raytheon and contract program requirements.

RTX is seeking a Production Test Engineering Intern to support manufacturing test processes at its Tucson, AZ facility. The role involves validating new or modified test equipment, ensuring accurate operation and documentation, and maintaining compliance with technical data packages.

RTX is seeking a 2026 Summer Intern for Electrical Engineering Production Hardware. The role is onsite in Tucson, AZ, and requires U.S. citizenship and a DoD Secret clearance.

Raytheon Electrical Production Support Engineer Intern is a 2026 internship focused on electrical product lifecycle support in Tucson, AZ. The role requires collaboration with Operations, Supply Chain, Quality, and Engineering to resolve production, testing, and integration issues. Candidates must have experience in digital, analog, RF testing, and debugging complex circuit card assemblies or electro‑mechanical systems, with preferred knowledge of RF/microwave devices.

Raytheon invites students to join as Summer Finance Intern/Co‑op in Tucson, AZ. Interns will work onsite in the Finance organization, gaining exposure to financial planning, analysis, accounting, budgeting, program and contract management, pricing, cash management, and business process improvement. Responsibilities include building financial models, enhancing finance tools, and presenting individual and group projects to leadership.

Real Estate Development Department at MAAC, a nonprofit focused on affordable housing, seeks an intern to support multifamily and commercial projects. The role involves coordinating site acquisition, due diligence, and local government approvals, while assisting budgeting and financing efforts.

Raytheon seeks an intern for Effector Power Design to design, analyze, simulate, test, and document power conversion circuitry, guide circuit card development, support ECAD drafting, act as an individual contributor, and present work to leadership. The role requires a bachelor’s or graduate degree in Electrical Engineering or STEM, junior year by summer 2026, experience with buck/boost/buck-boost converters, familiarity with MATLAB/MathCAD/Mathematica, and coursework in analog electronics.

Heat Response and Relief Graduate Intern at Pima County Health Department. Grant‑funded paid internship (8 positions, 2 offered) for 400 hours from 05/18/2026 to 07/31/2026.

Pima County Health Department offers eight paid summer internship positions (up to 400 hours) for students in public health, epidemiology, or related fields. Interns will work 5/18/2026–7/31/2026, assisting with data analysis, visualization, reporting, and community outreach.