Top Internships in St. Louis, MO

Paid, full-time software engineering internship supporting customer-context data patterns, decision-engineering tools, requirements analysis, and data-platform products. Interns collaborate with department teams, participate in professional development, networking, mentorship, and cross-functional activities. Candidates must be rising seniors pursuing a bachelor’s degree, maintain at least a 3.0 GPA, and be authorized to work in the U.S. without current or future employment-based sponsorship.

Supports tax consulting teams with corporate tax returns, compliance documents, tax research, international and multistate tax planning, tax provisions, audits, and client tax models. The intern analyzes regulations, applies data analytics to identify optimization opportunities, assists with regulatory compliance strategies, and learns PwC methodologies while collaborating with experienced tax professionals.

Supports financial statement audits by reviewing financial documents, analyzing financial data, documenting audit findings, evaluating internal controls, assessing risks, and applying GAAP, GAAS, and audit methodologies. Collaborates with audit teams, conducts research, and develops foundational knowledge of financial reporting, compliance, and client service while learning from experienced auditors.

Audit Interns support financial statement audits by reviewing financial documents, analyzing financial data, documenting audit findings, evaluating internal controls, and identifying risk factors. They learn and apply GAAP, GAAS, and PwC audit methodologies while collaborating with experienced auditors and supporting client service initiatives.

Supports financial statement audits by reviewing financial documents, analyzing financial data and trends, documenting audit findings, evaluating internal controls, and applying GAAP, GAAS, and audit methodologies. Collaborates with audit teams, conducts research, assesses risk factors, and develops foundational knowledge of financial reporting, compliance, and client service.

Supports tax consulting teams with corporate tax returns, compliance documents, tax research, international and multistate planning, tax provisions, audits, and client tax models. The intern analyzes regulations, applies data analytics, assists with regulatory compliance strategies, and learns PwC methodologies while collaborating with experienced professionals.

Supports audit teams with financial assessments, auditing methodologies, compliance and governance projects, data quality validation, research, and audit reporting. The intern also assists with cloud engineering and artificial intelligence solutions that improve audit processes, while developing skills through collaboration, client support, feedback, and observation of experienced auditors.

Supports tax consulting teams with corporate tax returns, compliance documents, tax research, regulatory analysis, international and multistate tax planning, tax models, provisions, audits, and data analytics. Collaborates on client projects while learning PwC methodologies and professional practices. The role requires an accounting background, CPA exam eligibility, and strong academic performance, with opportunities to develop tax strategy, compliance, and consulting skills.

Supports AI engineering initiatives at Vantor, contributing to spatial intelligence solutions and helping develop technologies that enable customers to understand current and future conditions. The posting provides limited role-specific responsibilities but emphasizes problem-solving, innovation, collaboration, and mission-focused work. Applicants must qualify as a U.S. Person under applicable export control and ITAR requirements.

Supports AI safety, robotics, cybersecurity, Physical AI, and advanced mobility projects. Conducts research on standards, regulations, and emerging technologies; assists with safety assurance and consulting activities; develops reports, presentations, workshops, and client deliverables; and contributes to AI safety, cybersecurity, robotics, and technology capabilities.

PhD intern supporting Boeing’s Computational Fluid Dynamics group in developing and enhancing aerodynamic analysis tools. Responsibilities include adding time-dependent fluid and multidisciplinary modeling capabilities to internal CFD software, improving simulation efficiency, benchmarking current methods, and collaborating with code developers and application engineers. The role is fully onsite in St. Louis and requires knowledge of compressible flows, turbulence modeling, CFD, and numerical methods for unstructured grids.

PhD intern supporting aerospace composite materials and structures research. Responsibilities include developing engineering requirements, conducting composite material characterization and testing, evaluating advanced manufacturing technologies, performing failure analysis, supporting supplier qualification, analyzing experimental data, and preparing technical reports and presentations. The role is fully onsite in St. Louis and involves collaboration with manufacturing, design, supply chain, and suppliers.

Mission Lead Interns embed with defense customers, identify mission problems, configure and test AI workflows, troubleshoot deployments, onboard users, demonstrate mission impact, and expand customer relationships. The role requires independent execution in ambiguous environments, close coordination with Product, Engineering, Mission, Security, and Operations teams, frequent customer-site travel, and a current TS/SCI clearance.

Paid, full-time summer intern supporting billing solutions projects in the telecommunications industry. Responsibilities may include developing agentic AI offer generation, designing and analyzing operational information, communicating findings, and troubleshooting system and data issues in production. The role also includes professional development, networking, mentorship, and cross-functional internship activities.

Paid 11-week corporate internship supporting the company’s procurement technology ecosystem, including Ariba, SAP, and Fieldglass. Responsibilities include end-user support, access and security management, upgrades, testing, outage response, vendor coordination, and continuous process improvement. Interns also participate in professional development, networking, mentorship, cross-functional projects, and presentations.

Paid, full-time software engineering internship supporting the SOC Operational Intelligence team. Responsibilities include developing Python data pipelines and packages, contributing to internal web applications, supporting AI agents and bots, writing automated tests, and improving developer tooling. The intern will work on production software, ETL pipelines, operational automation, and integrations with systems such as Jira, Ivanti, and Datadog while participating in mentorship, networking, professional development, and team projects.

Paid, full-time 11-week internship supporting billing solutions and telecommunications technology initiatives. Responsibilities include using AI to improve customer experience processes, analyzing business partner operations for improvement opportunities, and translating business requirements into functional specifications for technology platforms. Interns also participate in professional development, networking, mentorship, cross-functional projects, and presentations.

Paid, full-time software engineering internship supporting workforce management, technician scheduling, and dispatch tools. Interns will build features across web applications, APIs, databases, and cloud services; use AI-assisted development and pattern analysis; and participate in the full software development lifecycle. The program also includes mentorship, professional development, networking, community service, and final presentations.

Paid, full-time software engineering internship supporting Salesforce and CSML development, system integrations, testing, troubleshooting, automation, configuration, technical documentation, and product workflow changes. The intern will contribute to backlog refinement and sprint deliverables under supervision while participating in professional development, mentorship, networking, and cohort activities.

Paid, full-time QA Analyst internship supporting software quality assurance for web and desktop applications. Responsibilities may include developing automation frameworks with Java, Playwright, Selenium, and Python; creating and executing formal test plans; and conducting quality audits across IT functions. Interns also participate in professional development, networking, mentorship, and cross-functional activities.

Paid, full-time DevOps internship involving production issue triage, health monitoring, automation development, technical problem solving, software subsystem development, and launch support. Interns also participate in mentorship, professional development, networking, community service, and cross-functional projects. Candidates must be rising seniors pursuing a bachelor's degree, maintain at least a 3.0 GPA, and have unrestricted U.S. work authorization without current or future sponsorship needs.

Paid, full-time QA Analyst internship supporting billing-system functional testing. Responsibilities include learning testing tools, developing and executing formal test plans, documenting defects, and assisting with issue resolution. Interns also participate in professional development, networking, mentorship, community service, and presentations. The role is intended for rising seniors pursuing Information Technology, Computer Science, or a related degree.

Paid, full-time 11-week internship supporting billing operations for a telecommunications company. Responsibilities include assisting customer service with billing issues, using billing operations tools, implementing platform guardrails, handling complex billing problems, and coordinating with peer and application vendor teams. The intern will also participate in professional development, networking, mentoring, and cohort activities.

Paid, full-time 11-week internship supporting the Commercial Services and Enterprise Platform team. The intern will help develop and maintain automated deployment pipelines, support CI/CD practices, manage infrastructure as code, monitor and troubleshoot cloud environments, and optimize systems for scalability, reliability, and security under the guidance of senior engineers.

Paid 11-week Test Engineer internship supporting automated smoke and regression testing, test script updates, post-mortem quality analysis, documentation, data management, test case creation, and defect identification. Interns must be rising seniors pursuing a relevant bachelor’s degree with at least a 3.0 GPA and work authorization without sponsorship.