Actuarial assistant Jobs in St Louis, MO

Description:

Oliver Wyman – Actuarial Intern (2026) – Property & Casualty

Company Overview

is a global leader in management consulting. With offices in 70 cities across 30 countries, Oliver Wyman combines deep industry knowledge with specialized expertise in strategy, operations, risk management, and organization transformation. The firm has more than 7,000 professionals around the world who work with clients to optimize their business, improve their operations and risk profile, and accelerate their organizational performance to seize the most attractive opportunities. Oliver Wyman is a business of Marsh McLennan [NYSE: MMC]. For more information, visit www.oliverwyman.com. Follow Oliver Wyman on X @OliverWyman.

The of Oliver Wyman provides customized actuarial services and strategic insight, supporting clients as they strive to exceed their business objectives. Our exceptional client and employee retention exemplify our commitment to relationships built on trust, responsiveness, and clear communication.

Job Description

Job Title: P&C Intern - 2026

Office/Regions available: Atlanta, Charlotte, Chicago, Dallas, Houston, Nashville, New York, or St. Louis

The Property & Casualty Practice is seeking to hire an Actuarial Intern for the Summer of 2026 to support our property & casualty self-insurance business. As an Actuarial Intern, you will work alongside well-known, senior level consultants and gain broad industry exposure among Oliver Wyman’s clients, which include large corporations, captive insurance companies, state regulators, and healthcare provider systems. The candidate would be expected to use analytical skills within a team environment to analyze complex problems and develop workable solutions.

Potential projects may include:

• Assist in actuarial projects with a focus on loss reserving, cash flow projections, and loss forecasting

• Compile data, develop spreadsheet exhibits, perform basic analysis, and summarize internet research

• Utilize R and R Shiny to support a business intelligence application and other tools

• Reserve analysis, cash flow projections, benchmarking, due diligence for mergers & acquisitions

In addition, all interns participate in our actuarial bootcamp which consists of a series of presentations, case studies, and mentorship sessions over a six-week period and aims to give participants a valuable and directly applicable skillset for future employment opportunities within the actuarial industry.

Skills and Attributes

• Working towards Bachelor’s or Master’s degree in Actuarial Science, Mathematics, Statistics, Finance, or a related field

• Commitment to passing actuarial exams

• Desire for rapid learning, high performance, and professional growth

• Strong written and oral communication skills

• Excellent time management skills and understanding the value of collaboration, and the ability to work effectively in a team setting

• Strong technical exposure to MS Office, specifically in Excel, VBA or R preferred

Oliver Wyman seeks to invest in its people by fostering a safe and inclusive environment, respecting and welcoming different perspectives, promoting an ownership culture, providing opportunities for individuals to develop their personal brand, and celebrating successes and rewarding performance.

For more information, please visit our website at .

About Marsh McLennan

(NYSE: MMC) is the world’s leading professional services firm in the areas of risk, strategy and people. The Company’s 83,000 colleagues advise clients in 130 countries. With annual revenue of nearly $20 billion, Marsh McLennan helps clients navigate an increasingly dynamic and complex environment through four market-leading businesses. provides data driven risk advisory services and insurance solutions to commercial and consumer clients. develops advanced risk, reinsurance and capital strategies that help clients grow profitably and pursue emerging opportunities. delivers advice and technology-driven solutions that help organizations redefine the world of work, reshape retirement and investment outcomes, and unlock health and wellbeing for a changing workforce. serves as a critical strategic, economic and brand advisor to private sector and governmental clients. For more information, visit , follow us on and or subscribe to .

Oliver Wyman, a business of Marsh McLennan (NYSE: MMC), is a management consulting firm combining deep industry knowledge with specialized expertise to help clients optimize their business, improve operations and accelerate performance. Marsh McLennan is a global leader in risk, strategy and people, advising clients in 130 countries across four businesses: Marsh, Guy Carpenter, Mercer and Oliver Wyman. With annual revenue of $24 billion and more than 90,000 colleagues, Marsh McLennan helps build the confidence to thrive through the power of perspective. For more information, visit oliverwyman.com, or follow on LinkedIn and X.Marsh McLennan is committed to embracing a diverse, inclusive and flexible work environment. We aim to attract and retain the best people and embrace diversity of age background, disability, ethnic origin, family duties, gender orientation or expression, marital status, nationality, parental status, personal or social status, political affiliation, race, religion and beliefs, sex/gender, sexual orientation or expression, skin color, veteran status (including protected veterans), or any other characteristic protected by applicable law. If you have a need that requires accommodation, please let us know by contacting Marsh McLennan is committed to hybrid work, which includes the flexibility of working remotely and the collaboration, connections and professional development benefits of working together in the office. All Marsh McLennan colleagues are expected to be in their local office or working onsite with clients at least three days per week. Office-based teams will identify at least one “anchor day” per week on which their full team will be together in person.