There are several professional firms that provide leadership auditing and consulting services. These firms specialize in helping organizations assess and develop their leadership capabilities, improve their governance structures, and enhance their overall organizational performance.

Here are a few well-known professional firms in this space:

1. McKinsey & Company: McKinsey is a global management consulting firm that offers a range of services, including leadership development and organizational effectiveness. They work with clients to identify and develop high-potential leaders, design leadership development programs, and improve leadership effectiveness at all levels of the organization.
2. Deloitte: Deloitte is a multinational professional services network that provides audit, tax, consulting, and financial advisory services. They offer leadership assessment and development programs, executive coaching, and organizational design services to help clients optimize their leadership capabilities.
3. PricewaterhouseCoopers (PwC): PwC is one of the largest professional services networks globally, offering a wide range of services, including leadership consulting. They assist organizations in identifying and developing future leaders, designing leadership succession plans, and improving leadership effectiveness through assessments and coaching.
4. Korn Ferry: Korn Ferry is a global organizational consulting firm that specializes in leadership and talent development. They provide leadership assessment and development solutions, executive coaching, and leadership succession planning services to help organizations build a strong leadership pipeline.
5. Ernst & Young (EY): EY is a multinational professional services firm that offers a variety of services, including leadership development and advisory. They work with organizations to assess leadership capabilities, design leadership development programs, and provide strategic advice on leadership effectiveness and succession planning.

These firms typically have teams of experienced consultants and auditors who possess expertise in leadership development, organizational behavior, and strategic management. They work closely with clients to understand their specific needs and tailor their services accordingly, helping organizations enhance their leadership capabilities and drive organizational success.