Last updated: September 2026
Marsh McLennan is the world's largest insurance broker, a Fortune 500 (#168) company with $27 billion in annual revenue and approximately 95,000 employees across 130+ countries. The company operates through four distinct businesses: Marsh (insurance broking and risk), Mercer (health, wealth, and career consulting), Oliver Wyman (management consulting), and Guy Carpenter / Marsh Re (reinsurance). Across these businesses, Marsh McLennan runs 101+ summer intern seats through its US&C Summer Internship Programs, ranked #16 Best Consulting Internships, #20 Best for Finance, and #20 Best for Data Analytics by Vault (2026). Glassdoor rates Marsh at 3.9/5 overall, voted a Best Place to Work in 2025, with intern interview difficulty at just 2.6/5 and average time to hire of 7 days.
Quick Facts
| Fact | Detail |
|---|---|
| Where to apply | careers.marshmclennan.com (unified portal); each subsidiary also has its own early-careers page |
| Application window (2027–28) | Most programs: fall 2026 through winter 2027 (rolling). Oliver Wyman: fall 2026 with hard deadline ~late March 2027 |
| Rolling? | Mixed: Marsh, Mercer, Guy Carpenter are effectively rolling; Oliver Wyman has a hard deadline but fills spots before it |
| Eligibility | Current juniors (most tracks); sophomores eligible for MMC Sophomore Summit; all majors considered; 3.0+ GPA for Marsh/MMA; no visa sponsorship |
| Duration | 8–11 weeks depending on subsidiary (Marsh 10 weeks, MMA 11 weeks, Oliver Wyman 8–10 weeks) |
| Compensation | Marsh $25–$27/hr; Oliver Wyman $1,900–$2,100/week; Guy Carpenter ~$24/hr; Mercer/Analytics $25–$30/hr |
| Locations | NYC, Hoboken NJ, Chicago, Boston, Houston, San Francisco, Atlanta, Nashville, Seattle, 200+ MMA offices, global |
| # Programs | 20+ distinct tracks across Marsh, Mercer, Oliver Wyman, Guy Carpenter, and MMC Corporate Finance |
Marsh McLennan runs 20+ intern tracks across four businesses, each with its own timeline and interview format. Oliver Wyman has a hard deadline (~late March); all others fill on a rolling basis. A 3.0 GPA opens the door at Marsh/MMA; Oliver Wyman is GPA-blind on paper but effectively competitive at 3.5+.
Externships are short, remote professional experience programs where you finish a real project with a real company. The Yinan Zhao Investing & Financial Modeling Externship builds exactly the financial analysis skills that Marsh McLennan's analytics, finance, and consulting tracks demand. Explore all Externships.
What Is a Marsh McLennan Internship?
A Marsh McLennan internship is a paid summer placement at the world's largest insurance broker, spanning 20+ distinct tracks across four operating businesses. At Marsh, interns work directly with senior advisors and brokers on insurance and risk management for clients ranging from small businesses to Fortune 500 companies. At Mercer, interns contribute to health benefits consulting, retirement planning, and HR analytics. Oliver Wyman places interns on strategy consulting engagements solving high-level business problems for Fortune 1000 clients. Guy Carpenter / Marsh Re focuses on reinsurance broking and analytics. MMC Corporate Finance runs specialized tracks in Finance Innovation & Technology (FIT), Rising Talent in Finance (RTiF), and the Finance Leadership Development Program (FLDP). Vault ranks the combined US&C programs #16 for consulting, #20 for finance, and #20 for data analytics. Oliver Wyman reports a 90%+ return offer rate with 70%+ acceptance.
When Do Marsh McLennan Internship Applications Open for 2027–2028?
Marsh McLennan's recruiting timeline varies significantly by subsidiary. The biggest distinction: Oliver Wyman sets a hard application deadline (~late March), while Marsh, Mercer, Guy Carpenter, and MMC Corporate Finance programs fill on a rolling basis from fall through spring. For Summer 2028, most programs will open in fall 2026. The MMA Insurance Intern is an 11-week rotational that posts in early spring. MMC Corporate Finance runs a Sophomore Summit in Manhattan that feeds directly into summer intern interviews. Across all subsidiaries, expect a HireVue or recorded video interview as the first screen, followed by one to two live behavioral interviews. Oliver Wyman adds a case interview component.
Summer 2028 cycle applications are not yet open for most subsidiaries. This is your preparation window: decide which subsidiary matches your interests, set up alerts on careers.marshmclennan.com, and build analytical and communication skills.
Marsh Early Career, Mercer, Guy Carpenter, and MMC Corporate Finance programs expected to open for Summer 2028. Oliver Wyman posts around the same time with a hard deadline. Apply as soon as your target program opens; seats fill before posted deadlines.
Interviews run on a rolling basis. Marsh and Mercer use HireVue recorded video interviews followed by one to two live behavioral rounds. Oliver Wyman adds a case interview. Glassdoor reports an average 7-day timeline from application to offer for Marsh intern roles.
Oliver Wyman hard deadline for Summer 2028 applications (projected from March 29, 2026 deadline for Summer 2027). All other programs continue filling on a rolling basis through spring. Late applicants face limited remaining seats.
8-to-11-week internships across all four businesses, June to August. Each subsidiary offers distinct project work, mentorship, and exposure. Top performers receive return offers: Oliver Wyman converts 90%+ of interns.
How to read this page: our dates come from tracking previous recruiting cycles and daily posting data. Treat them as informed estimates based on historical patterns, not confirmed dates. The company's official careers page is always the most current source. If a role is posted there, go by that, even if this page suggests the window hasn't opened yet.
Why You Must Apply the Week Applications Open
Marsh McLennan's four-business structure means there is no single deadline, but that is a trap for procrastinators. Oliver Wyman's hard deadline makes it the most time-sensitive, yet even the rolling programs at Marsh, Mercer, and Guy Carpenter fill seats progressively. Glassdoor shows the average time from application to offer for Marsh interns is just 7 days, meaning positions turn over fast. The company hires 101+ interns across US&C programs alone, but spread across 20+ tracks in dozens of offices, individual track seats are limited. Students who apply in the first two weeks a posting appears have the widest selection of tracks and locations. The Sophomore Summit is a back door into corporate finance internships, and Oliver Wyman's 90%+ return offer rate means the summer intern class is effectively the full-time hiring class.
Which Marsh McLennan Internship Programs Should You Target?
Marsh McLennan runs 20+ distinct intern and early-career tracks across its four businesses plus corporate finance. Here are the seven most prominent:
| Track | Focus | Duration | Key details |
|---|---|---|---|
| Marsh Early Career Program | Insurance broking and risk advisory; work with senior advisors on Fortune 500 client accounts | 10 weeks | $25–$27/hr; 3.0 GPA; all majors; NYC, Hoboken NJ area |
| MMA Insurance Intern | 11-week rotational across agency insurance operations | 11 weeks | 3.0 GPA; 2+ semesters of business coursework; 200+ office locations |
| Oliver Wyman Summer Intern | Strategy consulting; quantitative analysis for Fortune 1000 clients | 8–10 weeks | $1,900–$2,100/week; no GPA minimum stated; case interview required; hard deadline ~late March |
| Mercer Health Consulting Intern | Health benefits consulting, actuarial tasks, healthcare claims analysis | 10 weeks | Strong analytical skills; Excel/PowerPoint; Atlanta, NYC, Chicago |
| Guy Carpenter Risk Summer Intern | Reinsurance broking, data analysis for client submissions | 10 weeks | ~$24/hr; NYC, Atlanta, Boston, San Francisco, Seattle |
| MMC Finance Innovation & Technology (FIT) | Build solutions using RPA, ML, blockchain for finance operations | 10 weeks | Undergrads in technology and/or finance; NYC |
| MMC Sophomore Summit | 1-day Manhattan event with direct interview for summer intern positions | 1 day | Sophomores only; pipeline into RTiF and FIT programs |
Additional tracks include Mercer Career and Wealth consulting, Marsh Analytics Solutions, Marsh Climate/Sustainability, NERA economic consulting (Oliver Wyman subsidiary), Lippincott design (Oliver Wyman subsidiary), and the RTiF Internal Audit and FP&A programs. See the full slate at careers.marshmclennan.com.
What Are the Eligibility Requirements?
Eligibility varies by subsidiary, but common threads run across all programs:
• Class year: current juniors for most programs (graduating Dec 2027–Jun 2028 for the 2028 cycle). Oliver Wyman targets second-year undergraduates. The Sophomore Summit accepts sophomores.
• GPA: 3.0+ cumulative for Marsh and MMA programs. Oliver Wyman does not publish a GPA minimum but is highly selective. Mercer and Guy Carpenter emphasize analytical skills without listing a specific floor.
• Major: all majors considered at Marsh and Oliver Wyman. Mercer prefers business-related majors. MMC Corporate Finance targets technology and finance majors.
• Work authorization: permanent, unrestricted US work authorization required across all programs. No visa sponsorship. CPT and OPT are explicitly considered restricted by Marsh and Oliver Wyman.
Can International Students Apply?
No, for US positions. Marsh McLennan consistently requires permanent US work authorization without sponsorship across all subsidiary programs. CPT and OPT are explicitly excluded. This is a firm-wide policy, not subsidiary-specific. International students should look at Marsh McLennan's international offices in London, Singapore, Hong Kong, and Tokyo, which have separate recruiting processes.
What Skills Does Marsh McLennan Look For, and How Do You Build Them?
Marsh McLennan's four businesses demand different skill mixes, but a common thread runs through every JD: analytical thinking, communication, and teamwork appear in every subsidiary's intern requirements. Excel and PowerPoint proficiency are near-universal. The difference is intensity: Oliver Wyman screens for elite quantitative reasoning and case-interview ability, while Marsh values relationship-building and client-facing polish. What does this tell you? The parent company hires people who can think analytically and communicate clearly, then each subsidiary adds its own layer of specialization.
What Marsh McLennan looks for in interns
Skills across 5 Marsh McLennan intern & analyst job descriptions · 2025–2026 cycle JDs across Marsh, Mercer, Oliver Wyman, and Guy Carpenter, projecting 2027–2028
Method: analysis of JDs across Marsh Early Career, MMA, Mercer Health/Career, Oliver Wyman, and Guy Carpenter Risk intern programs.
How Is Demand for Insurance & Consulting Interns Moving Right Now?
Insurance broking & consulting intern hiring: September 2026
Across US insurance brokerage and consulting intern postings tracked this month · aggregate market data, all employers
September 2026 shows broad-based demand across insurance and consulting intern tracks. The generational talent gap in insurance means more seats and less competition relative to pure strategy consulting. Candidates with both analytical skills and genuine interest in insurance or risk have a structural advantage.
Method: aggregate analysis of US insurance and consulting intern postings, September 2026.
Build These Skills Before You Apply
And every skill in the chart maps to a remote Externship where you finish a real company project before the window opens.
| Skill (from real JDs) | JD evidence | Externship that builds it |
|---|---|---|
| Financial analysis & quantitative reasoning | Oliver Wyman: 'strong background in analytics'; Marsh: analytical thinking across all JDs; Guy Carpenter: data analysis for reinsurance submissions | Yinan Zhao Investing & Financial Modeling |
| Data visualization & business intelligence | Mercer: 'working knowledge of Excel and PowerPoint'; Marsh Analytics: data-driven risk assessment | Center for Improving Youth Justice Data Visualization |
| Strategic thinking & problem-solving | Oliver Wyman: 'initiative, intuition and creativity'; Marsh: leadership and demonstrated initiative | Corporate Strategy (Eric Ries) |
How close is the overlap? The Yinan Zhao deliverable covers financial modeling in the vocabulary Marsh McLennan's analytics and consulting tracks use daily, the CIJY project builds the data visualization and Excel skills Mercer JDs specify, and the Eric Ries strategy work trains the structured problem-solving Oliver Wyman's case interviews test.
What Is the Marsh McLennan Application and Interview Process Like?
The interview process varies by subsidiary. Marsh and MMA use behavioral-only formats; Oliver Wyman adds a case interview. Across all, expect a recorded video screen as the first step:
1. Apply through the unified portal. Start at careers.marshmclennan.com and filter by subsidiary, or go directly to each subsidiary's early-careers page. Oliver Wyman has its own application at oliverwyman.com/careers.
2. Complete the HireVue / recorded video interview. Vault: 'The hiring process was an initial submission of resumes, a HireVue, as well as two Zoom interviews.' Standard behavioral questions about motivation, teamwork, and why this subsidiary.
3. Live interview(s): one to two rounds. For Marsh/Mercer/Guy Carpenter: behavioral and motivational questions with a hiring manager. Glassdoor: 'Very casual, nearly completely behavioral.' For Oliver Wyman: conversational interview + case interview (practice cases on their interview prep page).
4. Receive your offer. Marsh intern offers arrive in an average of 7 days from application per Glassdoor. Oliver Wyman and corporate finance tracks may take longer due to more selective processes.
For Marsh/MMA tracks, the interview is approachable: Glassdoor rates it 2.6/5 difficulty with 76% positive experience. For Oliver Wyman, dedicated case prep is essential. Our HireVue question guide with a free AI mock tool covers the recorded video format used across Marsh McLennan.
What Students on Reddit Say
Marsh McLennan intern discussions appear regularly on r/internships and r/InsuranceProfessional, covering the interview process, timeline uncertainty, and subsidiary-specific experiences.
A candidate who went through the Marsh Early Career Program interview described it as behavioral-focused with standard motivational questions: 'Why Marsh? Where do you see yourself in 5 years? Tell me about a situation when you had to convince someone.' No case component, no technical questions for the broking track.
A junior-year student had a phone screen for an MMA summer internship and worried about pausing during answers. Commenters reassured that some hesitation is normal and encouraged preparing clear answers for 'Why insurance?' and 'Why MMA?' The consensus: the process is approachable if you show genuine interest.
Multiple candidates reported uncertainty about hearing back after applying to the Marsh McLennan Early Career Program, with timelines varying by region and program. One thread showed applicants waiting weeks after interviews for Client Management intern roles, suggesting the process can be slower than the 7-day Glassdoor average implies.
How Do You Stand Out at a Company With Four Businesses and 95,000 Employees?
Three moves, all executable before fall 2026. First, choose your subsidiary deliberately. Marsh McLennan is not one company; saying "I want to work at Marsh McLennan" without specifying Marsh vs. Mercer vs. Oliver Wyman vs. Guy Carpenter signals that you have not done your homework. Know what an insurance broker does (Marsh), how health benefits consulting differs from HR consulting (Mercer), what reinsurance means (Guy Carpenter), and why Oliver Wyman's strategy consulting is distinct from McKinsey or Bain. Second, prepare for the interview format your subsidiary uses. Marsh and MMA are purely behavioral; Oliver Wyman requires case prep. This is not a detail to discover during the interview. Oliver Wyman publishes practice cases on their site. Third, if you are a sophomore, apply to the Sophomore Summit. It is a one-day event in Manhattan that feeds directly into corporate finance summer intern interviews, giving you a year of lead time over students who wait until junior year to engage.
What Other Companies Should You Consider?
Marsh McLennan competes for insurance broking and consulting intern talent with a well-defined peer set:
- Willis Towers Watsonthird-largest insurance brokerage; 8–10 week internships across risk, health, retirement, and investment consultingGuide →
- HUB Internationaltop-5 North American brokerage; Vault 2026 Top Program; property & casualty, employee benefits, and specialty internshipsGuide →
- Hiltonglobal hospitality leader; competes for the same campus talent interested in operations and client-service careersGuide →
- Hyattluxury hospitality company; offers structured summer internships in revenue management, finance, and operationsGuide →
Our finance internships summer 2027 guide maps the full landscape of financial services internship opportunities.
FAQ
When do Marsh McLennan Summer 2028 internship applications open?
Most Marsh, Mercer, and Guy Carpenter programs open in fall 2026 through winter 2027 with rolling review. Oliver Wyman posts around fall 2026 with a hard deadline near late March 2027. Corporate finance programs like FIT and RTiF post in fall 2026. Check the unified careers portal starting September 2026 for the earliest openings.
What GPA do I need for a Marsh McLennan internship?
Most Marsh and MMA programs require a minimum 3.0 GPA. Oliver Wyman does not publish a GPA minimum but is highly selective, with competitive applicants typically holding 3.5 or above. Mercer and Guy Carpenter emphasize strong analytical skills without listing a specific GPA floor in their job descriptions.
Does Marsh McLennan sponsor work visas for interns?
No. Across all US intern programs, Marsh McLennan requires permanent unrestricted work authorization. The company explicitly states it does not offer visa sponsorship, and CPT and OPT are considered restricted forms of authorization. International students without a Green Card are not eligible for US internships.
What is the Marsh McLennan interview process like?
For most Marsh and Mercer roles, expect a HireVue recorded video interview followed by one or two live behavioral interviews via Zoom or in person. Oliver Wyman adds a case interview on top of conversational interviews. Glassdoor reports an average seven-day timeline from application to offer for Marsh intern roles.
How much do Marsh McLennan interns get paid?
Pay varies by subsidiary. Marsh Early Career interns earn $25 to $27 per hour. Oliver Wyman summer interns receive approximately $1,900 to $2,100 per week. Guy Carpenter interns earn around $24 per hour. Mercer and Analytics roles fall in the $25 to $30 per hour range depending on location and track.
Can sophomores apply for Marsh McLennan internships?
Yes. MMC Corporate Finance runs a dedicated Sophomore Summit, a one-day event in Manhattan where sophomores learn about the Global Finance organization and interview for summer intern positions. Most other programs target juniors, but the Sophomore Summit provides an early pipeline for rising sophomores.
Do Marsh McLennan internships lead to full-time offers?
Yes, most programs are designed as pipelines. Oliver Wyman reports a 90-plus percent return offer rate. Marsh and MMA explicitly state that exceptional interns may receive full-time offers. Guy Carpenter confirms successful interns are offered Graduate Programme spots. Corporate finance programs feed into full-time analyst roles.
Which Marsh McLennan subsidiary should I apply to?
Choose based on your interests. Marsh is for insurance broking and risk management. Mercer covers health benefits, retirement, and HR consulting. Oliver Wyman is a strategy consulting firm best suited for candidates with strong quantitative and case-interview skills. Guy Carpenter focuses on reinsurance. Corporate finance programs span all four businesses.
Marsh McLennan's four-business structure means more paths into insurance and consulting than any single-brand competitor. Spend the runway building proof: a remote Externship turns interest in risk, consulting, or financial analysis into a finished project a fall 2026 application can point at.
About the Author
Bifei Wang has spent 17 years focused on human flow and the growth of young professionals, spanning international education, career training and coaching, and recruitment process outsourcing. Over 7 years at Extern, he has had one-on-one sessions with thousands of students exploring careers in consulting, finance, tech, marketing, and data, giving him a firsthand view of how the job market has shifted for early-career professionals and what it actually takes to break in.
