Business Impact Manager: Defense and Security, Global

About the role

Oliver Wyman, a Marsh (NYSE: MRSH) business, brings deep industry insight, bold innovation, and a collaborative approach to help organizations navigate defining transformative moments. As a business of Marsh, we work with leading experts across risk, reinsurance and capital, people and investments, and management consulting. With Marsh Risk, Guy Carpenter, and Mercer, we help organizations build resilience and competitive advantages. Oliver Wyman/Marsh operates a hybrid working policy and the successful candidate will work from the office at least 60% of the time.

The Business Impact Team (BIT) supports the growth of Oliver Wyman by 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 D&S task force Leadership in managing day-to-day affairs and serves as a go-to for colleagues on task force topics. The role translates D&S vision into strategic initiatives, performance metrics, and operational plans. It supports the rollout of D&S strategy and collaborates across Marsh businesses in the growth acceleration program. 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 align with strategic goals. This is a high-visibility, high-impact role for someone with strategic thinking, rigorous analytical skills, stakeholder management, and an interest in defense, national security, and government-related clients. The initial deployment is in support of the Marsh and Oliver Wyman Defense & Security task force, but deployment may change according to business needs.

What You Will Be Doing

• Develop and leverage trusted relationships with firm leadership and teams, as well as relevant infrastructure teams
• Manage or support recurring activities important to long-term success and day-to-day running of the business
• Support strategic topics, commercial activities, business operations, and engagement/communication
• Prepare and facilitate internal meetings; track action items; manage business to-do lists; execute people management processes; ensure compliance processes
• Identify and implement improvements in strategic, commercial, or operational processes to enhance efficiency
• Show leadership within the Business Impact Team by leading internal projects and enabling fellow members through learning and development and best practice sharing
• Provide coverage where needed

This role will suit someone with:

• 4+ years of experience in professional services; experience at a leading management consulting firm is highly desirable; experience with Defense & Security or government clients is strongly preferred
• Experience dealing with confidential and business-critical issues

Skills and Attributes

• Client Service Excellence: Delivers a high-impact client service experience
• Curiosity and Market Understanding: Understands Oliver Wyman and Marsh business dynamics and the broader market context
• Project Management and Solution Development: Manages multiple projects and develops solutions to enhance performance while meeting deadlines
• Insightful Advising: Provides high-quality insights and acts as a trusted advisor to leadership
• Effective Communication: Communicates clearly with diverse audiences
• Self-Motivation and Leadership
• Relationship Building and Collaboration
• Inclusivity and Diversity Advocacy
• Culture of Improvement: Shares best practices and fosters continuous improvement
• Performance Enhancement and Coaching
• Adaptability
• Bonus: Understands dynamics of private capital or corporate mergers and acquisitions

Technical Skills

• Quantitative skills; proficiency in Microsoft Office (Excel and PowerPoint); familiarity with generative AI and productivity tools is a plus
• Strong academic credentials in Business, Economics, International Relations, Public Policy, Engineering, or Security Studies; advanced degree is advantageous but not required
• Excellent written and verbal communication skills in English; additional languages helpful but not required
• Eligibility for security clearance (or prior clearance) may be required

Why join us at Oliver Wyman

At Oliver Wyman, we lead with heart. We strive for breakthroughs by seeking diverse perspectives and finding powerful, sustainable solutions. If you share these values, be brave, and achieve the amazing with us.

• We are self-starters, motivated, energetic, and entrepreneurial
• We aim to have an impact and shape our environment, not maintain the status quo
• We value an environment where every member is encouraged to voice their opinion
• We promote equality and diversity and remove artificial barriers to opportunity
• We balance work and personal life in a project-based culture and support reasonable adjustments for disabilities

To learn more, please follow us on Facebook, LinkedIn, or Twitter: OliverWyman.

Oliver Wyman, a Marsh McLennan company (NYSE: MMC), is a management consulting firm helping clients optimize their business, improve operations, and accelerate performance. Marsh McLennan operates in 130 countries across four businesses: Marsh, Guy Carpenter, Mercer, and Oliver Wyman. For more information, visit oliverwyman.com, or follow on LinkedIn and X.

Marsh is committed to a diverse, inclusive and flexible work environment. We are an equal opportunities employer and provide reasonable adjustments for candidates with disabilities. If you require reasonable accommodations, please contact us at

Marsh is committed to hybrid work with at least three days per week in the office or onsite with clients. An anchor day may be identified for team in-person collaboration.

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