Leadership at Rock Companies

A diverse corporate leadership team allows Rock Companies to excel in consistently providing their investors with superior results.

Their leadership team provides a full array of expertise and operational capabilities. Their team members have experience in engineering and design, construction management, property leasing, maintenance, accounting services, information systems and real estate law. This comprehensive base of knowledge is a primary factor in Rock Companies' ability to offer outstanding client service.


Jeff Cohen

Founder Rock Companies LLC
Vice Chairman and Minority Owner, NBA World Champion 2016 Cleveland Cavaliers


Jeff Cohen is the CEO and Founder of the Rock Companies, which includes the following family of companies: Rock Construction Company, Inc., Rock Equities LLC and Rock Management LLC. 

In June 2002, Jeff was part of a small group of investors that purchased Quicken Loans Inc. (which today consists of Quicken Loans, Rock Financial and Title Source) from Intuit Inc. Quicken Loans closed a record $220 billion in home loans in 2013. 

Jeff is the former President of JARC Properties, a non-profit organization providing housing and services to the developmentally disabled, and has served on the Board of the Jewish Federation of Metropolitan Detroit. He has also been active in the Juvenile Diabetes Foundation as well as various other charitable organizations.


Steven Rosenthal

President and Principal


Steve brings over 25 years of experience in real estate development, construction and management. 

Within Rock Companies, Steve has leadership responsibility for operations, acquisitions, underwriting and finance, and manages the establishment and implementation of governing policies and procedures companywide. In addition, he maintains functional responsibility for monitoring company budgets, cost management and top line revenue growth.  

Steve's professional memberships include the National Apartment Association and National Association of Home Builders, and he is an elected Franklin Village Council Trustee. Steve has a strong commitment to community affairs, serving on the board of the Jewish Federation of Metropolitan Detroit, an active participant in the Juvenile Diabetes Foundation and a board member of the Franklin Baseball Organization.


William (Bill) D. Leonard, Jr., CPA, MBA

Vice President of Finance


Bill Leonard joined Rock Companies in 2016 bringing over 22 years of experience in finance, accounting, and tax in a wide range of industries including real estate and construction.

Bill oversees finance, accounting, tax and HR related matters. Prior to joining Rock Companies, Bill worked for over 9 years at Olympia Development of Michigan LLC, 7 years at DaimlerChrysler Corporation, and 4 years at Price Waterhouse LLP gaining valuable finance, accounting, reporting, budgeting, management and real estate development experience.  

Bill is a CPA and member of the MACPA. Bill earned an MBA in Finance and BBA in Accounting from the University of Michigan Ross School of Business. Bill is actively involved in youth and high school baseball, serving as the Treasurer for Grosse Pointe Farms City Little League Board of Directors and as the Treasurer for the Grosse Pointe South High School Dugout Club.