Nalco Holdings LLC Water treatment and process improvement company

• Director (past)

The Partnership for New York City, Inc. Nonprofit membership organization comprised of a select group of two hundred CEOs from top NYC-based businesses

• Board Member (past)

Sirius XM Holdings, Inc. The holding company for two satellite radio services (SDARS) operating in the United States and Canada, Sirius Satellite Radio and XM Satellite Radio. The two parent companies completed their merger (

• Board Member (past)

United Rentals

• Director (past)

Mount Sinai Medical Center Hospital in New York City

• Board Member

Leon D. Black Family Foundation Categorized as a T20: Philanthropy, Voluntarism, and Grantmaking / (Private Grantmaking Foundations)

• President/Treasurer

Board Memberships