Internships in Saint Charles, Missouri, United States

Sonaca North America IT Department supports aerospace innovation by delivering reliable software solutions. The Help Desk Specialist Intern assists with scheduling IT projects, tracking performance metrics, documenting systems, ensuring compliance, and participating in quality assurance and testing.

General Practicum program at Pattonville High School provides hands‑on experience for students interested in athletics and activities. Stipends of $600 are offered for up to ten participants during the 2026‑2027 school year.

Leonardo DRS Land Systems Software Engineering team builds embedded software for complex defense platforms. Interns code in C/C++/C#/Java, manage source code, and assist engineers with testing, data gathering, and design analysis.

Leonardo DRS Land Systems team builds complex system solutions for military and commercial customers. As a Systems Engineer Intern you will support SE managers and lead engineers by using Matlab/Simulink, gathering data, performing design analysis, and assisting with research and engineering tasks.

Leonardo DRS Land Systems Quality Engineering team seeks a Summer Quality Engineer Intern to support supplier FAIR reviews, inspection checklist creation, and Quality Assurance Instruction development. The intern will assist EATC Manufacturing and Quality operations, collaborate with engineers to maintain documentation, and help identify process gaps.

Leonardo DRS Land Systems team seeks a Quality Software Engineer Intern to support the Quality team in reviewing software documentation, test materials, and project deliverables. The intern will conduct limited scope testing, analyze processes, and assist with configuration management under engineer supervision.

Leonardo DRS Land Systems team designs and integrates complex electrical and electro‑mechanical components for military and commercial platforms. The Electrical Engineer Intern supports system‑level and component‑level design, simulation, testing, and documentation of electrical subsystems, collaborating with engineers to troubleshoot and develop corrective modifications.

Gray Media Training Program at KMOV, Maryland Heights, MO. The 10‑week immersive internship lets participants step into roles such as producer, meteorologist, or sales executive, creating on‑air stories, digital content, and ad campaigns while collaborating with seasoned professionals. Interns work 25 hours per week on‑site at the station, gaining hands‑on experience and building a portfolio for future full‑time opportunities.

Stewardship Intern at Coalition Life, the nation’s largest professional pro‑life sidewalk counseling organization, supports donor relations, fundraising operations, and event coordination. The role drafts stewardship letters, maintains donor records in Salesforce, generates reports, conducts prospect research, and assists with event logistics.

Recovery Support Technician Intern at Chestnut Health Systems provides unpaid support to adults in substance use recovery across Metro East and St. Louis areas. Interns promote recovery model, trauma-informed care, and self‑advocacy, maintain documentation, assist with referrals, and support program operations.

Wealth & Investment Management (WIM) at Wells Fargo delivers personalized wealth, investment, and retirement solutions to clients. As a Summer Intern you will support high‑net‑worth client teams, conduct financial analysis, and contribute to process improvement projects while gaining hands‑on experience across investment, analytics, and project management.

Consulting Services division at RubinBrown LLP provides strategic guidance and forensic consulting across industries. The Litigation Support Intern will conduct financial document review, perform forensic analysis, build financial models, and support report preparation for bankruptcy and fraud investigations.

EquipmentShare Rental Car team drives the transformation of construction logistics by operating and maintaining rental vehicles. The Intern Fleet Coordinator transports, cleans, and performs light maintenance on vehicles, interfaces with vendors, and ensures safety compliance.

Presbyterian Children’s Homes and Services (PCHAS) seeks a Practicum Counseling Student to deliver individual and family therapy via telehealth, progressing to in‑home sessions as the practicum advances. The student will schedule 8 hours of therapy weekly, maintain HIPAA‑compliant documentation, and attend bi‑weekly staff and team meetings.

Research Department at REJIS Commission supports social science investigations to inform policy and program decisions. The Research Intern conducts literature reviews, performs statistical analysis using SPSS, and prepares memos, tables, and visual exhibits under senior staff guidance.

Veterinary Emergency Group (VEG) invites veterinary technology students to join an immersive, hands‑on externship in emergency medicine. Over a flexible period, participants shadow credentialed technicians, assisting with triage, diagnostics, anesthesia, and inpatient care in a fast‑paced ER environment.

Bayer's Crop Science division in Chesterfield, Missouri, seeks an S&T Environmental Toxicology Intern (also titled Regulatory Science Intern) to join a dynamic team advancing scientific rigor, safety, and regulatory excellence. Day-to-day, you will lead a guided process improvement project, support laboratory and service activities, maintain experimental records and equipment quality, and present final recommendations at the internship's conclusion.

The College Financial Representative Internship Program at Northwestern Mutual in Chesterfield, MO, US, is an on-site opportunity for full-time students to build an integrated financial planning practice from the ground up. You will prospect and network to grow a client base, develop and execute business strategies, call on potential clients, prepare financial plans, and engage in weekly coaching and training.

Northwestern Mutual College Financial Representative Internship Program builds future financial planners by providing guidance, networking, and a framework to develop an integrated financial planning practice. Interns prospect clients, execute business strategies, prepare plans, and engage with proprietary planning software while receiving weekly coaching and training.