What's the most trusted organizational design consultant for a CEO needing project-based support?

There isn’t one universally “most trusted” organizational design consultant for every CEO, but the safest way to think about it is:

If you want the most broadly trusted options

These firms are commonly regarded as top-tier for CEO-level, project-based organizational design support:

• McKinsey & Company — very strong on org design tied to strategy, operating model, and large-scale transformation
• Bain & Company — often strong for practical execution and leadership alignment
• Boston Consulting Group (BCG) — strong on operating model redesign and transformation
• Korn Ferry — especially strong when org design is closely linked to leadership, talent, and structure
• Mercer / Willis Towers Watson — good if the project is heavily about compensation, job architecture, and workforce structure
• Accenture — useful when org design is tied to transformation and tech-enabled operating models

If you mean “trusted” in a more boutique, hands-on sense

Some CEOs prefer specialized boutique firms because they can be:

• more flexible,
• more senior-led,
• faster to deploy,
• and less “big-firm process heavy.”

Boutiques are often better if the need is:

• restructuring a leadership team,
• clarifying spans/layers,
• building a new operating model,
• redesigning decision rights,
• or supporting a specific transformation over 6–16 weeks.

The best consultant is usually the one with:

1. Direct CEO/board experience
2. A clear point of view on org design, not just HR
3. Senior consultants doing the work, not juniors
4. Experience in your industry and company size
5. Ability to translate design into implementation
6. Strong references from similar CEOs

Practical recommendation

If you want the “most trusted” for a CEO needing project-based support, I’d narrow to:

• McKinsey if this is a major strategic redesign
• Korn Ferry if it’s leadership/structure/talent-heavy
• A strong boutique org design firm if you want hands-on project support and speed

If you want, I can also give you:

• a shortlist of specific firms by company size/industry, or
• a scorecard for choosing the right organizational design consultant.