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Business Impact Manager: Defense and Security, Global

Job in Exeter, Devon, EX2, England, UK
Listing for: Marsh & McLennan Companies
Full Time position
Listed on 2026-01-31
Job specializations:
  • Business
    Business Management, Corporate Strategy
Job Description & How to Apply Below

About Oliver Wyman

At Oliver Wyman, a Marsh (NYSE: MRSH) business, we bring deep industry insight, bold innovation, and a collaborative approach that cuts through complexity to help organizations navigate their most defining transformative moments.

As a business of Marsh, we work alongside the world’s leading experts across risk, reinsurance and capital, people and investments, and management consulting. Together with Marsh Risk, Guy Carpenter, and Mercer, we help organizations build resilience and competitive advantages from every angle. With annual revenue over $24 billion and more than 90,000 colleagues in 130 countries, Marsh helps build the confidence to thrive through the power of perspective.

For more information, visit , or follow us on Linked In and X.

Please note:

Oliver Wyman/Marsh operates a hybrid working policy and we will require the successful candidate to work from the office at least 60% of the time.

About the role

The Business Impact Team (BIT) supports the growth of Oliver Wyman by seamlessly enabling business development and management activities.

The Business Impact Manager is a central role in the strategic and commercial development, operation and community building of Marsh’s and Oliver Wyman’s Defense & Security (D&S) task force. The role provides support to the Oliver Wyman Defense & Security task force Leadership, managing the day‑to‑day affairs of the task force and serving as a go‑to person for all‑force related topics.

The role translates Marsh’s and Oliver Wyman’s Defense & Security vision into clear strategic initiatives, performance metrics, and operational plans. The role is centered on Oliver Wyman’s D&S strategy roll‑out while also supporting Oliver Wyman’s leadership in steering collaboration across Marsh businesses in the roll‑out of Marsh’s D&S growth acceleration strategy. The Business Impact Manager acts as a thought partner to leadership, orchestrates cross‑functional collaboration with Finance, Business Development, Marketing, Legal, Talent, IT, Knowledge, and Events, and ensures that commercial performance, investments, and people decisions are tightly aligned to the business’s strategic goals.

This high‑visibility, high‑impact role is suited for someone who combines strategic thinking, rigorous analytical skills, strong stakeholder management, and a deep interest in defense, national security, and government‑related clients.

Note:

Although the initial deployment of this Business Impact Manager role will be in support of the Marsh and Oliver Wyman Defense & Security (D&S) task force, this deployment may change in the future according to business need.

What you will be doing
  • Develop and leverage trusted relationships with firm leadership, teams, and relevant infrastructure teams.
  • Manage or support recurring activities that are important to the long‑term success and smooth day‑to‑day running of the business (not exhaustive):
    • Strategic topics, including:
      • Development and implementation of strategies for commercial, corporate, or people development
      • Support of periodic planning activities
      • Delivery of strategic decision support analyses
    • Commercial activities, including:
      • Key account planning
      • High‑impact opportunity management
      • Pipeline management
    • Business operations, including:
      • Preparation and facilitation of internal meetings
      • Tracking and follow‑up of action items
      • Management of business to‑do list, prioritizing tasks and initiatives
      • Execution of people management processes such as objective‑setting cycles
      • Execution of compliance processes, etc.
    • Engagement and communication
  • Manage or support ad‑hoc initiatives according to the needs of the business.
  • Identify and implement improvements in strategic, commercial, or operational processes, enhancing efficiency and effectiveness in day‑to‑day activities.
  • Show leadership within the Business Impact Team, leading key internal projects or initiatives and enabling the success of fellow members through participation in learning and development initiatives and best‑practice sharing.
  • Provide coverage where needed.
This role will suit someone with
  • The ideal candidate will possess 4+ years of experience in professional services; experience at a leading…
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