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Principal Lead Health Actuary Consultant

Marsh McLennan · Chicago, IL · $124,000–$203,800 a year · Full time

Posted Oct 1, 2026 · We last checked this listing on Oct 6, 2026

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Likely interview questions for this role

Written from this job description, not a generic list. Each one notes what the interviewer is really checking.

About your past

Tell me about a junior analyst whose work you reviewed and found real problems in. How did you handle it?

What they are checking: Whether they catch errors and coach people, which the posting puts at the center of this role.

Tell me about a time you were the main financial contact for a difficult client.

What they are checking: Whether they can manage a demanding relationship while keeping the work accurate.

How do you explain a complex projection to an HR leader with no actuarial background?

What they are checking: Whether they can translate technical results into decisions a client can make.

What would you do

How do you negotiate a fully insured renewal with a carrier when you think their rate is too high?

What they are checking: Whether they can use data and market leverage to get a better result for the client.

A client wants to cut costs without hurting employees. What plan design options would you bring?

What they are checking: Whether they can offer practical trade-offs that balance cost and employee experience.

About the work

Walk me through how you build a renewal projection for a self-funded employer health plan.

What they are checking: Whether they understand experience, trend, large claims and credibility well enough to defend a number to a client.

A client's medical costs jumped twelve percent this year. How do you figure out what drove it?

What they are checking: Whether they separate trend, utilization, high-cost claimants and plan changes rather than blaming inflation.

How would you help a client decide whether to move from fully insured to self-funded?

What they are checking: Whether they can weigh risk tolerance, stop-loss, cash flow and size honestly rather than pushing one answer.

Which tools do you use for cost projections, such as Excel or SAS, and how do you make your models reviewable?

What they are checking: Whether they build analysis that others can check and trust.

How do GLP-1 drugs and specialty pharmacy change the way you project costs for employers?

What they are checking: Whether they keep up with current cost drivers that have a big effect on employer plans.

Practice this interview out loud.

Offer builds a real interview for this exact role at Marsh McLennan from your resume and this job description, asks the questions one at a time, and tells you what landed. The first one is free.

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The full job description

As published by Marsh McLennan.

Company: Mercer Description: We are seeking an experienced individual to join our Actuarial and Financial Consulting team, part of our People and Investments business at Marsh. This role will be based in any of our US office locations. This is a hybrid role that has a requirement of working at least three days a week in the office. As a Principal Lead Health Actuary Consultant you will manage client projects focused on employers’ health benefits strategies, including financial projections, plan design optimization, and renewal negotiations. You will also serve as a primary financial contact for clients while providing direction to analysts and associates. We will count on you to: • Lead routine client engagements, managing overall service delivery, strategy, financial evaluations, plan design, renewals, business placement, benchmarking, and other projects related to underwriting health and welfare insurance. • Review data analyses conducted by junior staff to ensure actuarial accuracy, proper use of models, and support their professional development. • Perform and review complex analyses and cost projections using tools like Excel, SAS, and other software, with potential specialization in healthcare-related insurance areas. • Thrive and be motivated by an environment that embraces AI and technology-enabled tools. • Draft and review client reports and presentations to summarize findings, recommend strategies, and propose solutions or plan designs. • Handle day-to-day client interactions, resolve project-related questions, and guide junior team members in client management. • Assist senior team members in business development efforts by identifying growth opportunities and supporting responses to proposals. • Contribute to the development of intellectual capital and expand knowledge of health insurance actuarial services and products. What you need to have: • BA/BS degree in actuarial science, math, statistics, finance, economics, or a related field required. • Minimum 10+ years’ experience working in an actuarial field, with health and benefits consulting experience • Proven progress to obtaining your ASA designation • Client facing experience • Strong analytical skills and working knowledge of Microsoft Office—Word, Excel, and PowerPoint. What makes you stand out: • Experience in health benefits actuarial consulting. • ASA credentialed Why join our team: • We help you be your best through professional development opportunities, interesting work, and supportive leaders. • We foster a vibrant and inclusive culture where you can work with talented colleagues to create new solutions and have an impact for colleagues, clients, and communities. • Our scale enables us to provide a range of career opportunities, as well as benefits and rewards to enhance your well-being. Application will posted through October 1. #MERHBUS The applicable base salary range for this role is $124,000 to $203,800 The base pay offered will be determined on factors such as experience, skills, training, location, certifications, education, and any applicable minimum wage requirements. Decisions will be determined on a case-by-case basis. In addition to the base salary, this position may be eligible for performance-based incentives. Marsh (NYSE: MRSH) is a global leader in risk, reinsurance and capital, people and investments, and management consulting, advising clients in 130 countries. With annual revenue of over $27 billion and more than 95,000 colleagues, Marsh helps build the confidence to thrive through the power of perspective. For more information, visit marsh.com, or follow us on LinkedIn and X. Marsh 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 reasonableaccommodations@marsh.com. Marsh 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 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.

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