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Mercer, a business of Marsh McLennan, is a global leader in helping clients realize investment objectives and enhance health and retirement outcomes for their people. Marsh McLennan operates in 130 countries across four businesses: Marsh, Guy Carpenter, Mercer and Oliver Wyman.

Junior Business Support Executive – hybrid role with requirement to work in the London office 3 days per week.

Part of the MMB Multinational Team, supporting global clients on insured employee benefits oversight, cost control and governance.

• Provide diary management support and organization for senior colleagues across various time‑zones.
• Provide comprehensive administrative support to colleagues, including creating / editing documents, managing expenses end‑to‑end travel.
• Manage design input to ensure materials are presented using the latest Mercer templates.
• Support business development and associated administration, e.g. using MPower, our Client Relationship Management system, and finance tasks such as complex code set‑up and billing processes to assist consultant queries.
• Volunteer for opportunities to work on new projects.
• Provide in‑person support for client meetings, including greeting guests, escorting to rooms, ensuring Wi‑Fi access, refreshments and other on‑the‑day assistance.
• Support internal and external events in collaboration with marketing and facilities to ensure successful delivery.

• Excellent communication, analytical, organisational planning and interpersonal skills.
• Detail‑oriented and creative mindset within a team environment.
• Proficiency in Outlook, Excel, PowerPoint, online survey tools and other applications.
• Inquisitive with a willingness to learn new skills/applications as required.
• Comfortable communicating with internal and external stakeholders across different seniorities, geographies and languages.

• Prior experience in a business support‑type role (although this is not essential).

• Professional development opportunities, interesting work and supportive leaders.
• A vibrant and inclusive culture with talented colleagues to create new solutions and have an impact on clients and communities.
• A range of career opportunities and benefits to enhance well‑being.

Type: Full‑time | Vacancy: 1 | Required Experience: Junior IC

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 civil partnership status disability ethnic origin family duties gender orientation or expression gender reassignment marital status nationality parental status personal or social status political affiliation race religion and beliefs sex / gender sexual orientation or expression skin colour or any other characteristic protected by applicable law. We are an equal opportunities employer. We are committed to providing reasonable adjustments in accordance with applicable law to any candidate with a disability to allow them to fully participate in the recruitment process. If you have a disability that may require reasonable adjustments please contact us at